do not open this test booklet until you are asked to...

DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE ASKED TO DO SO

BHARAT SANCHAR NIGAM LIMITED : BSNL - TTA 2016(A Govt. of India Enterprise)

Mock Test Paper - 1

Time Allowed: 3 hours Max. Marks: 200

Read the following instructions carefully.

1. Candidate should read and strictly observe the instructions printed in the Question Booklet as well as on the

OMR Answer Sheet.

2. Candidate should not write anything except as directed in the OMR Answer Sheet.

3. In case of any doubt, discrepancy and ambiguity in the Hindi version, the English version should be treated as

final.

4. The Question booklet has 200 questions. Each question carries one mark. There are four choices for each

question. The candidate is required to choose the most appropriate answer from the choices given and darken

the relevant bubble against the question number in the OMR Answer Sheet accordingly.

5. There will be one-fourth negative marking.

6. Use of calculator is strictly prohibited.

7. Use only black ball point pen to darken the bubble.

8. Set A, B, C or D of question booklet should be written correctly in column given in right top corner of OMR

answer sheet and appropriate bubble should be darkened by the candidate.

9. While filling the roll No. in OMR answer sheet, candidate should use the 2 digit SSA code as given in table of

instructions given overleaf of OMR Answer Sheet.

10. More than one answer bubbled will be treated as an INCORRECT response.

11. After you have completed filling all your responses hand over to the invigilator the answer Sheet. You are

PERMITTED to take away Question Booklet with you.

12. Sheets for rough work are appended in the Question Booklet at the end.

BSNL-TTA Mock Test Paper - 1

Engineering Career Tutorial2007 All Right Reserved. ECT Publications. www.iesect.in Mob. 9461673930Premier institute for preparation of GATE IES & PSUs. ECT Centre’s: Jaipur Jodhpur Ajmer Lucknow

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Choose the one which best express the meaning of thegiven word

1. SPECTATORS

(a) Listeners (b) Audience

(c) Onlookers (d) Participants

2. RESTOATION

(a) Renovation (b) Renewal

(c) Reinstatement (d) Recreation

Choose the word opposite in meaning to the givenword

3. EXODUS

(a) Restoration (b) Return

(c) Home-coming (d) Influx

4. INNOCENT

(a) Sinful (b) Guilty

(c) Deadly (d) Corruption

PART I : GENERAL AWARENESS – 20 MARKS

Sentence Completion

5. ……by people’s perception it seems that democracy hassucceeded in India.

(a) following (b) going

(c) Making (d) Planned

6. I am given to …….that you are going abroad.

(a) learn (b) think

(c) predict (d) understand

One Word Substitution

7. To mediate between two parties in a dispute

(a) Interfere (b) Interact

(c) Interrupt (d) Intercede

8. The branch of medical science which deals with theproblems of the old

(a) Oncology (b) Geriatrics

(c) Obstetrics (d) Endocrinology

9. ,Q ,Q lh iw.kZ :i

(a) fons'kh foÙk fuxe(b) fQYe foÙk fuxe(c) QqVc‚y QsMjs'ku dkmafly(d) mijksä esa ls dksbZ

10. Hkkjr ds fQYe vkSj Vhoh laLFkku dgkW fLFkr gS

(a) iq.ks ¼egkjk"Vª½ (b) jktdksV ¼xqtjkr½(c) fiaijh ¼egkjk"Vª½ (d) isjEcwj ¼rfeyukMq½

11. 'We the people' çfl) iqLrd fdlus fy[kk

(a) Vh ,u dkSy (b) tgkaxhj jruth nknkHkkbZ VkVk(c) [kq'koar flag (d) ukuh iky[khokyk

12. 20 vxLr ds :i esa euk;k tkrk gS

(a) i`Foh fnol (b) ln~Hkkouk fnol(c) rEckdw fu"ks/k fnol (d) buesa ls dksbZ ugha

13. fo"kk.kq foKku ds jk"Vªh; laLFkku dgka fLFkr gS\

(a) iq.ks (b) fnYyh(c) dksydkrk (d) eækl

9. FFC stands for(a) Foreign Finance Corporation(b) Film Finance Corporation(c) Federation of Football Council(d) None of the above

10. Film and TV institute of India is located at(a) Pune (Maharashtra) (b) Rajkot (Gujarat)(c) Pimpri (Maharashtra) (d) Perambur (Tamilnadu)

11. Who wrote the famous book - 'We the people'?(a) T.N.Kaul (b) J.R.D. Tata

(c) Khushwant Singh (d) Nani Palkhivala

12. 20th August is celebrated as(a) Earth Day (b) Sadbhavana Divas(c) No Tobacco Day (d) None of these

13. Where is the National Institute of Virology situated?(a) Pune (b) Delhi(c) Kolkata (d) Madras

3Engineering Career Tutorial 2007 All Right Reserved. ECT Publications. www.iesect.in Mob. 9461673930Premier institute for preparation of GATE IES & PSUs. ECT Centre’s: Bajaj Nagar Pratapnagar Kukas Ajmer

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BSNL-TTA Mock Test Paper - 114. Hkkjr ds fdl jkT; esa ou dk lcls cM+k {ks= gSA

(a) v#.kkpy çns'k (b) gfj;k.kk

(c) e/; çns'k (d) vle

15. '.INI' foLrkj fdl rjg dh Qkby ds fy, vke rkSj ij lanfHkZr djrk gS\

(a) Nfo Qkby

(b) flLVe Qkby

(c) gkbijVsDLV lacaf/kr Qkby

(d) Nfo jax feyku çksQkby Qkby

16. AM dk D;k eryc gS\

(a) ,atsyks ekjdksuh (b) bZlk ea>yk

(c) vk;ke e‚Mîwyu (d) ,Eih;j

17. fuEu esa ls dkSu lk isafly esa bLrseky fd;k tkrk gS\

(a) xzsQkbV (b) flfydu

(c) ydM+h dk dks;yk (d) Q‚LQksjl

18. vtqZu iqjLdkj fdl o"kZ esa LFkkfir fd;k x;k

(a) 1965 (b) 1961

(c) 1963 (d) 1957

19. æks.kkpk;Z iqjLdkj fdlds fy, fn;k tkrk gS ---\

(a) f[kykfM+;ksa (b) dksp

(c) vaik;jksa (d) [ksy laikndksa

20. ‘dFkdyh’ yksd u`R; fdl jkT; esa çpfyr gS\

(a) dukZVd (b) mM+hlk

(c) dsjy (d) ef.kiqj

Hkkx&II : tujy lkekU; vfHk;kaf=dh; & 90 vad

21. eku ysa A

= 2i – 3j – 6k vkSj B

= –2i – 2j – k rc

B AA B

i j d k ç { kis . k

i j d k ç { kis . kcjkcj gS

(a) 73

(b) 3

(c) 4 (d) buesa ls dksbZ ugha

22. vxj A

= i + 2j – 3k vkSj B

= 3i – j + 2k rks osDVj A B

vkSj

A B

ds chp ds dks.k gS

(a) 4

(b)3

(c) 2

(d) buesa ls dksbZ ugha

14. The state having a largest area of forest cover in India is

(a) Arunachal Pradesh (b) Haryana

(c) Madhya Pradesh (d) Assam

15. '.INI' extension refers usually to what kind of file?

(a) Image file

(b) System file

(c) Hypertext related file

(d) Image Color Matching Profile file

16. What does AM mean?

(a) Angelo marconi (b) Anno median

(c) Amplitude modulation (d) Amperes

17. Which of the following is used in pencils?

(a) Graphite (b) Silicon

(c) Charcoal (d) Phosphorous

18. The Arjuna Awards were instituted in the year

(a) 1965 (b) 1961

(c) 1963 (d) 1957

19. The 'Dronacharya Award' is given to...?

(a) Sportsmen (b) Coaches

(c) Umpires (d) Sports Editors

20. 'Kathakali' is a folk dance prevalent in which state?

(a) Karnataka (b) Orissa

(c) Kerala (d) Manipur

PART II : GENERAL ENGINEERING – 90 MARKS

21. Let A

= 2i – 3j – 6k and B

= –2i – 2j – k then the value of

The projection of A on BThe projection of B on A

is equal to

(a) 73

(b) 2

(c) 4 (d) None of these

22. If A

= i + 2j – 3k and B

= 3i – j + 2k, then the angle

between the vector A B

and A B

is

(a) 4

(b) 3

(c) 2

(d) None of these



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23. ;fn B

= 2i + 6j + 3k ij A

= i + j + 4k dh vfn'k ç{ksi.k 4

bdkb;ksa gS rks cjkcj gS

(a) 5 (b) 3

(c) 1 (d) - 5

24. eSfVªDl mRikn 1 22 4 5 2 3

3 5

cjkcj gS

(a)36

9

(b)369

(c) 369


25. vxj A ,d oxZ eSfVªDl gS] rks TA A gS

(a) frjNk&lefer eSfVªDl (b) lefer eSfVªDl

(c) fod.kZ eSfVªDl (d) buesa ls dksbZ ugha

26. vxj A = 1 22 1

rks adj A cjkcj gS

(a) 1 2 (b) 1 22 1

(c)2 11 1

¼d½ 1 22 1

27. vxj A ,d foy{k.k eSfVªDl gS] rks adj A gS

(a) xSj foy{k.k (b) foy{k.k

(c) lefer (d) ifjHkkf"kr ugha

28. vxj ex + ey = ex+y, rks mlds ckn dk ewY; dydx

, (1, 1) ij gS

(a) 0 (b) –1


29. ;fn f(x) = logx(lnx) rks f (x) at x = e gS

(a) 1e

(b) e

(c) 1e

¼d½ 0

23. If the scalar projection of A

= i + j + 4k on B

= 2i + 6j +3k is 4 units then is equal to

(a) 5 (b) 3

(c) 1 (d) –5

24. The matrix product 1 22 4 5 2 3

3 5

equals

(a)36

9

(b) 369

(c) 369

(d) None of these

25. If A is a square matrix, then TA A is a

(a) skew-symmetric matrix (b) symmetric matrix

(c) diagonal matrix (d) None of these

26. If A = 1 22 1

, then adj A is equal to

(a) 1 2 (b) 1 22 1

(c)2 11 1

(d) 1 22 1

27. If A is a singular matrix, then adj A is

(a) non-singular (b) singular

(c) symmetric (d) not defined

28. If ex + ey = ex+y, then the value of dydx

at (1, 1) is

(a) 0 (b) –1


29. If f(x) = logx(lnx) then f (x) at x = e is

(a) 1e

(b) e

(c)1e

(d) 0


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30. vxj x y 4 gS] rks y = 1 ij dxdy

gS]

(a) –1 (b) –3


31. sec(tan–1x) dk foHksnd xq.kkad gS

(a) 2

x1 x

(b) 2

11 x

(c) 2x 1 x (d) 2

x1 x

32. vxj 2x + 2y = 2x+y, rks x = y = 1ij dydx

dk eku gS

(a) 0 (b) –1

(c) 1 (d) 2

33. x2 + y2 = 25 }kjk fcanq (10, 0) ij cuk;k x;k dks.k gS

(a) 6

(b) 4

(c) 2

¼d½ 3

34. n

dx dxx(x 1) cjkcj gS

(a) n

n

1 xlog cn x 1

(b) n

n

1 x 1log cn x

(c) n

n

xlog cx 1


35.5 1/ 5

6

(x x ) dxx

cjkcj gS

(a) 6 / 5

4

5 1 1 C24 x

(b) 6 / 5

4

5 11 C24 x

(c) 6/5

4

5 1 1 C24 x


36. lehdj.k dk lek/kku 2

2x2

d y e isdx

(a)2xe4

(b)2xe cx d

4

(c) 2x 21 e cx d4

¼d½ 2x1 e cx d4

30. If x y 4 , then dxdy

at y = 1, is

(a) –1 (b) –3


31. Differential coefficient of sec(tan–1x) is

(a) 2

x1 x

(b) 2

11 x

(c) 2x 1 x (d) 2

x1 x

32. If 2x + 2y = 2x+y, then the value of dydx

at x = y = 1 is

(a) 0 (b) –1

(c) 1 (d) 2

33. The angle subtended by x2 + y2 = 25 at the point (10, 0) is

(a) 6

(b) 4

(c) 2

(d) 3

34. n

dx dxx(x 1) is equal to

(a)n

n

1 xlog cn x 1

(b) n

n

1 x 1log cn x

(c)n

n

xlog cx 1

(d) None of these

35.5 1/ 5

6

(x x ) dxx

is equal to

(a)6 / 5

4

5 1 1 C24 x

(b) 6 / 5

4

5 11 C24 x

(c)6/5

4

5 1 1 C24 x

(d) None of these

36. The solution of the equation 2

2x2

d y e isdx

(a)2xe4

(b) 2xe cx d

4

(c) 2x 21 e cx d4

(d) 2x1 e cx d4



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37. varj lehdj.k dk ,d lek/kku

2dy dyx y 0 isdx dx

(a) y = 2 (b) y = 2x(c) y = 2x – 4 (d) y = 2x2 – 4

38. varj lehdj.k dh fMxzh

43 4

3 4

d y dy d yx 4log isdx dx dx

(a) 1 (b) 3


39.225

19 1ii

ds ewY;

(a) 4 ¼b½ – 4

(c) 2 (d) – 2

40.2 21 i 1 i

1 i 1 i

gS

(a) 2i (b) – 2i

(c) – 2 (d) 2

41. P fofdj.k ncko dk çfrfuf/kRo djrk gS] C çdk'k dh xfr dk çfrfuf/kRo

djrs gSa vkSj Q fofdj.k ÅtkZ çfr lsdaM ,d bdkbZ {ks=] rc xSj 'kwU; iw.kkaZdksa

x, y vkSj z ,slh gS fd PxQyCz vk;kejfgr djrk gS

(a) x = 1, y = 1, z = –1 (b) x = 1, y = –1, z = 1

(c) x = –1, y = 1, z = 1 ¼d½ x = 1, y = 1, z = 1

42. eqä varfj{k ds permittivity dh bdkbZ] 0 gS

(a) coulomb/newton-metre(b) newton-metre2/coulomb2

(c) coulomb2/newton-metre2

(d) columnb2/(newton-metre)2

43. ,d ygj cuk gSS

(a) gok v.kqvksa (b) daiu(c) le;≤ ij xfr;ksa (d) nksyuksa

44. fuEu esa ls ,d ds chp lcls vf/kd ÅtkZ gS\

(a) Cyw çdk'k (b) xzhu çdk'k

(c) yky cÙkh (d) ihyk çdk'k

45. vius ?kVd jaxksa esa çdk'k dh caVokjs ds :i esa tkuk tkrk gS

(a) ifjyf{kr çdk'k (b) QSyko

(c) ik'kZ~o myVk (d) i`FkDdj.k

37. A solution of the differential equation

2dy dyx y 0 isdx dx

(a) y = 2 (b) y = 2x

(c) y = 2x – 4 (d) y = 2x2 – 4

38. The degree of the differential equation43 4

3 4

d y dy d yx 4log isdx dx dx

(a) 1 (b) 3


39. The value of 225

19 1ii

is

(a) 4 (b) – 4

(c) 2 (d) – 2

40.2 21 i 1 i

1 i 1 i

is

(a) 2i (b) – 2i(c) – 2 (d) 2

41. If P represents radiation pressure, C represent speed oflight and Q represents radiation energy striking a unit areaper second, then non-zero integers x, y and z such that

PxQyCz is dimensionless are

(a) x = 1, y = 1, z = –1 (b) x = 1, y = –1, z = 1

(c) x = –1, y = 1, z = 1 (d) x = 1, y = 1, z = 142. The unit of permittivity of free space, 0 is

(a) coulomb/newton-metre(b) newton-metre2/coulomb2

(c) coulomb2/newton-metre2

(d) columnb2/(newton-metre)2

43. A wave is made up of(a) air molecules (b) vibrations(c) periodic motions (d) oscillations

44. Which one among the following has the highest energy?(a) Blue light (b) Green light(c) Red light (d) Yellow light

45. Splitting of light into its constituent colors is known as(a) Reflected light (b) Dispersion(c) Lateral Inversion (d) Separation


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BSNL-TTA Mock Test Paper - 146. çdk'k rjaxksa fxykl dks gok ls xqtjrh gSa tc] pj çHkkfor gSa

(a) rjaxnS/kZ~;] vko`fÙk vkSj osx

(b) osx vkSj vko`fÙk

(c) osoysaFk vkSj vko`fÙk

(d) osoysaFk vkSj osx

47. vk;ke vkSj vko`fÙk ds nks egRoiw.kZ xq.k gSa

(a) Å"ek (b) cy

(c) /ofu (d) çdk'k

48. /ofu dks NksM+dj ,d ek/;e ds ek/;e ls ;k=k dj ldrs gSa

(a) xSlksa (b) Bksl

(c) rjy inkFkZ (d) oSD;we

49. çdk'k dh fdj.k 60 fMxzh ds dks.k ij ,d fxykl IysV ij ?kVuk gSA dkap dk

viorZukad D;k gksxk ;fn ifjyf{kr gksrk gS vkSj viofrZr fdj.kksa ,d nwljs ls

lh/kk dj jgs gSa &

(a) 3 (b) 3/2

(c) 3/2 ` (d) 1/2

50. l?ku ek/;e esa çdk'k fdj.kksa ;k Nfo ds >qdus ds :i esa dgk tkrk gS

(a) çfrfcac (b) Opacation

(c) viorZu (d) ok"iksRltZu

51. tSls ygj izpkj djrh gS

(a) ygj rhozrk ,d Iysu oso ds fy, fujarj cuh gqbZ gS

(b) ygj rhozrk ,d xksykdkj ygj ds fy, lzksr ls nwjh ds oxZ ds çfrykse ds:i esa de gks tkrh gSA

(c) xksykdkj ds Åij xksykdkj ygj dh dqy rhozrk

(d) mijksDr lHkh

52. ,d ygj xfr y = A sin (kx – t), y çfrfuf/kRo dj ldrs gSa

(a) fctyh ds {ks= (b) pqacdh; {ks=

(c) foLFkkiu (d) mijksDr lHkh

53. ,d c<+kdj fLVªax esa ,d ;k=k dh ygj lehdj.k }kjk of.kZr gS

y = A sin(kx – t) vf/kdre d.k osx gS

(a) A (b) / k

(c) d / dk (d) x /

46. When light waves pass from air to glass the variablesaffected are_____

(a) Wavelength, frequency and velocity

(b) Velocity and frequency

(c) Wavelength and frequency

(d) Wavelength and velocity

47. Amplitude and frequency are two important properties of

(a) Heat (b) Force

(c) Sound (d) Light

48. Sound can travel through a medium except

(a) gases (b) solids

(c) liquids (d) Vacuum

49. A ray of light is incident on a glass plate at an angle of 60°.What would be the refractive index of glass if reflectedand refracted rays are perpendicular to each other –

(a) 3 (b) 3/2

(c) 3/2 (d) 1/2

50. Bending of light rays or image in denser medium is termed

as

(a) Reflection (b) Opacation

(c) Refraction (d) Transpiration

51. As a wave propagates

(a) the wave intensity remains constant for a plane wave

(b) the wave intensity decreases as the inverse of thesquare of the distance from the source for a sphericalwave

(c) total intensity of the spherical wave over the spherical

(d) All of these

52. In a wave motion y = A sin (kx – t), y can represent

(a) electric field (b) magnetic field

(c) displacement (d) All of these

53. A travelling wave in a stretched string is described by theequation y = A sin (kx – t). The maximum particle velocityis

(a) A (b) / k

(c) d / dk (d) x /



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54. ,d ystj esaA

(a) mRlkfgr ijek.kqvksa fofdj.k ystj ds fy, ckgjh }kjk QksV‚uksa Qsaduk djus

ds fy, çsfjr dj jgs gSa

(b) ystj mRltZu ds fy, laØe.k tehu jkT; ds fy, lh/ks gSa

(c) jkT; gS tks ystj mRltZu dks tUe ns vkerkSj ij cgqr vfLFkj dgk x;k

gS fd rsth ls {k; gSa

(d) jkT; esa tks ,d ijek.kq 'kq: esa mRlkfgr gS ds chp dHkh ugha nks jkT;ksadks çsfjr mRltZu esa 'kkfey dj jgs gS

55. ,d ystj che esa QksV‚uksa ÅtkZ] rjax nS/kZ~;] /#ohdj.k dh fn'kk] vkSj pj.k

leku gS] D;ksafd &

(a) çR;sd ,d mRltZu gS fd fdlh vU; ds }kjk çsfjr gS esa mRiknu fd;k gS

(b) lHkh ,d gh ijek.kq ls vkrs gSa

(c) lasing lkexzh dsoy nks DokaVe jkT;ksa gS

(d) lHkh dks leku :i ls QksV‚uksa] D;k muds lzksr gSa dksbZ QdZ ugha iM+rk

56. nucleon çfr ck/;dkjh ÅtkZ

(a) lHkh fo[kaMu dh ?kVukvksa ds fy, c<+ tkrh gS

(b) dqN ds fy, c<+ tkrh gS] ysfdu lHkh ugha] fo[kaMu dh ?kVukvksa

(c) lHkh fo[kaMu dh ?kVukvksa ds fy, de gks tkrh gS

(d) ds fy, dqN de gks tkrh gS] ysfdu lHkh ugha] fo[kaMu dh ?kVukvksa

57. ;wjsfu;e U;wVª‚u ceckjh dk ,d ifj.kke ds :i esa fo[kaMu dh çfØ;k ls xqtjrk

gS] ÅtkZ tkjh dh otg ls gS \

(a) ;wjsfu;e ds v‚Dlhdj.k

(b) ca/ku ÅtkZ esa deh

(c) ;wjsfu;e ukfHkd dh jsfM;ks/kfeZrk

(d) fo[kaMu mRiknksa dh jsfM;ks/kfeZrk

58. tc 236U fo[kaMu VqdM+s dj jgs gSa

(a) ges'kk 140Xe vkSj 94Sr (b) ges'kk leku

(c) dHkh ugha 140Xe vkSj 94Sr (d) mijksä esa ls dksbZ Hkh

59. fuEu esa ls dkSu lk ,d ijek.kq fo[kaMu fj,DVj esa t:jr ugha gS\

(a) lapkyd (b) Rojd

(c) 'khryd (d) fu;a=.k midj.k

60. ÅtkZ lw;Z }kjk mRikfnr ds vf/kdka'k dh otg ls gSA

(a) ijek.kq fo[kaMu (b) ijek.kq lay;u

(c) jklk;fud çfrfØ;k (d) xq#Rokd"kZ.k iru

54. In a LASER:

(a) excited atoms are stimulated to emit photons byradiation external to the LASER

(b) the transitions for LASER emission are directly to theground state

(c) the state which give rise to LASER emission are usuallyvery unstable states that decay rapidly

(d) the state in which an atom is initially excited is neverbetween two states that are involved in the stimulatedemission

55. Photons in a LASER beam have the same energy,wavelength, polarization direction, and phase because:

(a) each is produced in an emission that is stimulated byanother

(b) all come from the same atom

(c) the lasing material has only two quantum states

(d) all photons are alike, no matter what their source

56. The binding energy per nucleon:

(a) increases for all fission events

(b) increases for some, but not all, fission events

(c) decreases for all fission events

(d) decreases for some, but not all, fission events

57. When uranium undergoes fission as a result of neutronbombardment, the energy released is due to:

(a) oxidation of the uranium

(b) a reduction in binding energy

(c) radioactivity of the uranium nucleus

(d) radioactivity of the fission products

58. When 236U fissions the fragments are:

(a) always 140Xe and 94Sr (b) always identical

(c) never 140Xe and 94Sr (d) none of the above

59. Which one of the following is NOT needed in a nuclearfission reactor?

(a) Moderator (b) Accelerator

(c) Coolant (d) Control device

60. Most of the energy produced by the Sun is due to:

(a) nuclear fission (b) nuclear fusion

(c) chemical reaction (d) gravitational collapse


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BSNL-TTA Mock Test Paper - 161. f}vk/kkjh ¼Binary½ la[;k (1000001)2 ds xzs dksM cjkcj gS

(a) 1100001 (b) 1100011

(c) 1000011 (d) 110101

62. fuEufyf[kr dksM esa ls dkSu lk ,d Weighted dksM gS\

(a) Excess- 3 code (b) Shift-counter cod

(c) Gray code (d) 5111 code

63. fuEu esa ls dkSu lk Error correcting code gS&

(a) EBCDIC (b) xzs

(c) gSfeax (d) ASCII

64. ,d la;kstu lfdZV buiqV ,] ch vkSj lh andits d'ehj uD'kk gS ds :i esa

fn[kk;k gSA lfdZV ds mRiknu }kjk fn;k tkrk gS

1 11

ABC

0001

00 01 11 10

1

(a) A 'B AB' C (b) A 'B AB' C '

(c) A 'B'C ' ¼d½ A B C

65. fuEu esa ls dkSu lk cwfy;u igpku dh nksgjh :i gS

(a) AB + AC = AC + AC

(b) (A + B)(A + C) = AB + AC

¼c½ (A + B) (A + C) = (A + C) (A B)

(d) AB + AC = AB + AC + BC66. nks buiqV NAND xsV dh U;wure la[;k nks fuos'k OR xsV ds lekjksg esa

çn'kZu djus ds fy, ç;ksx fd;k tkrk gS

(a) ,d (b) nks

(c) rhu (d) pkj

67. uhps c;ku ij fopkj djsa

I. vxj ,d OR xsV ls mRiknu rjax viuh tkudkjh esa ls ,d esa rjax ds

:i esa ,d gh gS] vU; buiqV LFkk;h :i ls de fd;k tk jgk gSAeSa rks ,d

;k QkVd ls mRiknu rjax viuh tkudkjh

II. vxj ,d OR xsV ls mRiknu rjax ges'kk mPp gS] vius buiqV esa ls ,d

LFkk;h :i ls mPp vk;ksftr dh tk jgh gSA c;ku gS] tks ges'kk lp gS

(a) nksuksa I vkSj II (b) dsoy I

(c) dsoy II (d) mijksä esa ls dksbZ Hkh ugha

61. The gray code equivalent of binary number (1000001)2is:

(a) 1100001 (b) 1100011

(c) 1000011 (d) 110101

62. Which of the following codes is a weighted code?

(a) Excess- 3 code (b) Shift-counter code

(c) Gray code (d) 5111 code

63. Which of the following is error-correcting code?

(a) EBCDIC (b) GRAY

(c) Hamming (d) ASCII

64. A combination circuit has input A, B and C andits K map

is as shown. The output of the circuit is given by:

1 11

ABC

0001

00 01 11 10

1

(a) A 'B AB' C (b) A 'B AB' C '

(c) A 'B'C ' (d) A B C

65. Which of the following is the dual form of the BooleanIdentity:

(a) AB + AC = AC + AC(b) (A + B)(A + C) = AB + AC

(c) (A + B) (A + C) = (A + C) (A B)

(d) AB + AC = AB + AC + BC66. The minimum number of two input NAND gate used to

perform the function of two inputs OR gate:(a) one (b) two(c) three (d) four

67. Consider the statement below:I. If the output waveform from an OR gate is the sameas the waveform at one of its inputs, the other input isbeing held permanently LOW.II. If the output waveform from an OR gate is alwaysHIGH, one of its input is being held permanently HIGH.The statement, which is always TRUE is:(a) both I & II (b) only I(c) only II (d) None of above



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68. Find the output Y :

Y

A 1

1

(a) 0 (b) 1(c) A (d) A

69. An n-bit parallel adder consists of:(a) n/2 full adders (b) In half adders(c) n full adders (d) (n + 1) full adders

70. Another name of data selector is:(a) decoder (b) encoder(c) multipliexer (d) none of these

71. The flip-flop used in shift register are generally:(a) SR flip-flop (b) JK flip-flop(c) D flip-flop (d) T flip-flop

72. The circuit given below is a

QA

BQ

(a) J-K Flip-flop (b) Johnson’s counter(c) R-S latch (d) None of the above

73. Which of the following logic gates dissipates minimumpower ?(a) RTL (b) TTL(c) MOS (d) ECL

74. The number of comparators in a 4-bit flash ADC is(a) 4 (b) 5(c) 15 (d) 16

75. The voltage comparator shown in fig. can be used in theanalog-to-digital conversion as

Vo

V1

V2

(a) a 1-bit quantizer (b) a 2-bit quantizer(c) a 4-bit quantizer (d) a 8-bit quantizer

68. mRiknu Y [kkstsa

Y

A 1

1

(a) 0 (b) 1

(c) A (d) A69. ,d ,u&fcV lekukarj ;kstd ds gksrs gSa:

(a) n/2 iw.kZ ,Mj (b) vk/kks ;kstd

(c) n iw.kZ ,Mj (d) (n + 1) iw.kZ ,Mj

70. MsVk p;udrkZ dk nwljk uke gS:

(a) fMdksMj (b) ,udksMj

(c) multiplieÛer (d) buesa ls dksbZ ugha

71. f¶yi ¶y‚i cnyko jftLVj esa bLrseky vke rkSj ij dj jgs gSa:

(a) ,lvkj f¶yi ¶y‚i (b) tsds f¶yi ¶y‚i

(c) Mh f¶yi ¶y‚i (d) Vh f¶yi ¶y‚i

72. lfdZV uhps fn, x, ,d gS

QA

BQ

(a) J-K f¶yi ¶y‚i (b) t‚ulu dkmaVj

(c) vkj ,l dqaMh (d) mijksä esa ls dksbZ Hkh

73. fuEufyf[kr logic gates ds dkSu lk de ls de fctyh dissipates djrk gS\

(a) RTL (b) TTL

(c) MOS (d) ECL

74. ,d 4 fcV ¶yS'k ,Mhlh esa comparators dh la[;k

(a) 4 (b) 5

(c) 15 (d) 16

75. oksYVst rqyfu= Nfo esa fn[kk;k x;k gSA ds :i esa ,uky‚x ls fMftVy

:ikarj.k esa bLrseky fd;k tk ldrk gS

Vo

V1

V2

(a) 1-fcV çek=d (b) ,d 2&fcV çek=d

(c) ,d 4 fcV çek=d (d) ,d 8- fcV çek=d


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BSNL-TTA Mock Test Paper - 176. Magnetism of a magnet can be destroyed by

(a) heating(b) hammering(c) by inductive action of another magnet(d) by all above methods

77. Main causes of noisy solenoid are

(a) strong tendency of fan out of laminations at the endcaused by repulsion among magnetic lines of force

(b) uneven bearing surface, caused by dirt or uneven wearbetween moving and stationary parts

(c) both (a) & (b)

(d) none of the above

78. For which of the following materials the saturation valueis the highest ?(a) Ferromagnetic materials(b) Paramagnetic materials(c) Diamagnetic materials(d) Ferrites

79. What will be the current passing through the ring shapedair cored coil when number of turns is 800 and ampereturns are 3200 ?(a) 2 (b) 4(c) 6 (d) 8

80. The direction of magnetic lines of force is(a) from south pole to north pole(b) from north pole to south pole(c) from one end of the magnet to another(d) none of the above

81. A material which is slightly repelled by a magnetic field isknown as(a) ferromagnetic material(b) diamagnetic material(c) paramagnetic material(d) conducting material

82. Which of the following is a vector quantity ?(a) Relative permeability(b) Magnetic field intensity(c) Flux density(d) Magnetic potential

76. ,d pqacd dh pqacdRo lHkh mi;qZä fof/k;ksa }kjk

¼a½ rki

(b) Vad.k

(c) fdlh pqEcd dh izsjd dk;Zokgh ls u"V fd;k tk ldrk gS

(d) mijksDr lHkh fof/k;k¡

77. noisy solenoid ds eq[; dkj.kksa esa&

¼a½ pqacdh; cy js[kkvksa ds fod"kZ.k }kjk ysehus'ku ds lhjs ij nzM Qsu

vkmV izo`fÙk

(b) fLFkj vkSj xfr'khy Hkkxksa ds chp /kwy f?klko ds dkj.k vfu;fer

ch;fjax lrg

(c) ¼a½ vkSj ¼b½ nksuksa


78. fuEufyf[kr lkexzh dh ftlds fy, lar`fIr ewY; lcls T;knk gS\

(a) ferromagnetic lkexzh

¼b½ lepqacd lkexzh

(c) çfr&pqacdh; lkexzh

(d) QsjkbV~l\

79. ,d NYyk ds vkdkj dk gok cored rkj ds ek/;e ls cgus okyk djUVD;k gks tk,xk tc ?kqekoksa dh la[;k 800 gS vkSj ,Eih;j ?kqekoksa dh la[;k

3200 gSa\

(a) 2 (b) 4

(c) 6 (d) 8

80. cy ds pqacdh; ykbuksa dh fn'kk gS

(a) mÙkjh /#o ds nf{k.k /#o ls

(b) nf{k.k /#o ds fy, mÙkjh /#o ls

¼c½ nwljs ds fy, pqacd ds ,d Nksj ls

(d) bues ls dksbZ Hkh ugha

81. ,d lkexzh gS tks FkksM+k ,d pqacdh; {ks= }kjk repelled gS ds :iesa

¼a½ ferromagnetic lkexzh

(b) çfr&pqacdh; æO;

(c) lepqacd lkexzh

(d) dk vk;kstu lkexzh esa tkuk tkrk gS

82. buesa ls ,d lfn'k ek=k gS\

¼a½ lkis{k ikjxE;rk

(b) pqacdh; {ks= dh rhozrk

(c) çokg ?kuRo

(d) pqacdh; laHkkfor



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83. Two infinitely long parallel conductors in vacuum andseparated 1 metre between centers . A current of 1 ampereflows in each conductor, produce on each other a force of(a) 2 x 1(T2 N/m) (b) 2 x KT3 N/m(c) 2 x 10"5 N/m (d) 2x 1(T7 N/m)

84. The diameter of the nucleus of an atom is of the order of

(a) 10 –31 m (b) 10–25 m

(c) 10–21 m (d) 10–14m

85. The mass of proton is roughly how many times the mass ofan electron?(a) 184,000 (b) 184,00(c) 1840 (d) 184.

86. The charge on an electron is known to be1.6 x 10–19 coulomb. In a circuit the current flowing is 1 A.How many electrons will be flowing through the circuit ina second?

(a) 1.6 x 10–19 (b) 1.6 x 10–19

(c) 0.625 x 10–19 (d) 0.625 x 10–12

87. Two bulbs marked 200 watt-250 volts and 100 watt-250volts are joined in series to 250 volts supply. Powerconsumed in circuit is(a) 33 watt (b) 67 watt(c) 100 watt (d) 300 watt.

88. Ampere second could be the unit of(a) power (b) conductance(c) energy (d) charge

89. One kilowatt hour of electrical energy is the same as(a) 36 x 105 watts (b) 36 x 10s ergs(c) 36 x 105 joules (d) 36 x 105 B.T.U.

90. An electric current of 5 A is same as(a) 5 J / C (b) 5 V / C(c) 5 C / sec (d) 5 C / sec

91. Hall effect can be used to determine :(a) Carrier concentration of semiconductor(b) Whether semiconductor is of p-type or n-type(c) Conductivity & Mobility

(d) All of the above

83. nks 'kwU; esa vlhe yacs lekukarj daMDVj fdlh Hkh dsaæksa ds chp 1 ehVjvyx> rks 1 ,Eih;j /kkjk cgrh gSA çR;sd daMDVj] ,d nwljs ij

¼a½ 2 x 1(T2 N/m) ¼b½ 2 x KT3 N/m(c) 2 x 10"5 N/m (d) 2x 1(T7 N/m)

84. ,d ijek.kq ds ukfHkd dk O;kl

(a) 10 –31 m (b) 10–25 m

(c) 10–21 m (d) 10–14m

85. çksV‚u ds æO;eku dk eksVs rkSj ij fdruh ckj ,d bysDVª‚u dh cM+s

iSekus ij gS\

(a) 184,000 (b) 184,00

(c) 1840 (d) 184

86. ,d bysDVª‚u ij vkjksi 1.6 x 10–19 coulomb Coulomb gksus dsfy, tkuk tkrk gSA ,d lfdZV esa orZeku esa cgus 1 A mPp gSA fdrus

bysDVª‚uksa ,d nwljs esa lfdZV ds ek/;e ls cg gksxk\

(a) 1.6 x 10–19 (b) 1.6 x 10–19

(c) 0.625 x 10–19 (d) 0.625 x 10–12

87. nks cYc 200 okV&250 oksYV vkSj 100 okV&250 oksYV fpfàr 250 oksYVdh vkiwfrZ J`a[kyk esa 'kkfey gks x, gSaA ikoj lfdZV esa HkLe

(a) 33 okV (b) 67 okV

(c) 100 okV (d) 300 okV

88. ,Eih;j nwljs ds

(a) ikoj (b) pkydrk

(c) ÅtkZ (d) çHkkjh bdkbZ gks ldrk gS

89. fo|qr ÅtkZ ds ,d fdyksokV ?kaVs ds :i esa

(a) 36 x 105 okV (b) 36 x 10s ergs

(c) 36 x 105 joules (d) 36 x 105 B.T.U.

90. 5 A ds ,d fo|qr çokg ds :i esa

(a) 5 J / C (b) 5 V / C

¼c½ 5 C / sec ¼d½ 5 C / sec

91. g‚y çHkko dks fu/kkZfjr djus ds fy, bLrseky fd;k tk ldrk gSA

(a) v/kZpkyd ds okgd ,dkxzrk

(b) v/kZpkyd ih çdkj ;k ,u&çdkj

(c) pkydrk vkSj xfr'khyrk

(d) mijksä lHkh dk gS ;k ugha:


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BSNL-TTA Mock Test Paper - 192. Mksuj v'kq)rk ijek.kq ubZ esa ,d v/kZpkyd ifj.kke gS:

(a) O;kid ÅtkZ cSaM

(b) ladh.kZ ÅtkZ cSaM

(c) cl pkyu Lrj

(d) flQZ valance ds Lrj ls Åij vlrr ÅtkZ ds Lrj ls uhps vygnk

ÅtkZ dk Lrj

93. ,u çdkj v/kZpkyd ds fy, n = ND vkSj p = ni2 / ND, ] Nsn

,dkxzrk Nsn esa ls dqN otg ls vkarfjd ewY; ls uhps fxj tk,xk

(a) iqu% xzkgh v'kfq) dks iznku djuk

(b) iqu% nkrk v'kfq) dks iznku djuk

(c) dkyiuhd :i ls fØLVy ls ckgj fudyuk

(d) bysDVª‚uksa ds lkFk recombine gksuk

93. deh lekbZ] nksuksa rjQ yxkrkj Mksfiax ds lkFk ,d vkdfLed ih ,u taD'ku

dh CT fjolZ iwokZxzg ds lkFk cnyrk jgrk gS] VR ds :i esa

(a) T RC V (b) 1T RC V

(c) 12

T RC V

¼d½13

T RC V

95. lekukarj esa tqM+s nks Mk;ksM dk ,d la;kstu gS tc ,d ,dy Mk;ksM dh rqyuk

esa

(a) esa nks ckj f'k[kj myVk voltages ds ewY; lkeuk dj ldrs gSa

(b) vf/kdre vkxs orZeku

(c) ,d cM+k fjlko orZeku

(d) ds nks ckj ewY; esa nks ckj oksYVst esa dVkSrh dk ewY;

96. ,d tsuj Mk;ksM fdl fl)kUr ij dk;Z djrk gSA

(a) ds taD'ku esa pktZ okgd ds Vusfyax fl)kar ij dke djrk gSA

(b) FkeksZ vk;fud mRltZu

(c) taD'ku Hkj esa pktZ okgd dk çlkjA

(d) taD'ku Hkj esa pktZ okgd dk lap;A

97. ,d bUQzk&jsM ,ybZMh vkerkSj ij

(a) Ge (b) Si

¼c½ Ga As (d) Ga As P

98. ,d BJT, ICO = 2µA. esaA ;g ns[krs gq, ICEO ds ewY; ds }kjk

fn;k tkrk gS

(a) 2µA (b) 99µA

(c) 198µA (d) 200µA

92. Donor impurity atom is a semiconductor result in new:(a) Wide energy band(b) Narrow energy band(c) Discrete energy level just below conduction level(d) Discrete energy level just above valance level

93. For then n-type semiconductor with n = ND andp = ni

2 / ND, the hole concentration will fall below theintrinsic value beacuse some of the holes(a) Drop back to acceptor impurity states

(b) Drop to donor impurity states

(c) Virtually leave the crystal

(d) Recombine with the electrons

94. The depletion capacitance, CT of an abrupt p-n junctionwith constant doping on either side varies with reversebias,VR, as :

(a) T RC V (b) 1T RC V

(c) 12

T RC V

(d) 13

T RC V

95. A combination of two diodes connected in parallel whencompared to a single diode can withstand(a) Twice the value of peak inverse voltages(b) Twice the value of maximum forward current(c) A larger leakage current(d) Twice the value of cut in voltage

96. A zener diode works on the principle of(a) Tunneling of change carriers across the junction.(b) Thermo ionic emission.(c) Diffusion of charge carriers across the junction.(d) Accumulation of charge carriers across the junction.

97. An infra-red LED is usually fabricated from(a) Ge (b) Si(c) Ga As (d) Ga As P

98. In a BJT, ICO = 2µA. Given the value of ICEO is given by :

(a) 2µA (b) 99µA

(c) 198µA (d) 200µA



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99. ,d BJT ds vk/kkj iqulaZ;kstu esa o`f)

(a) the common emitter dc current gain

(b) the breakdown voltage CEOBV(c) the unity-gain cut-off frequency Tf

(d) the transconductance mg

100. FET esa] ço/kZu dkjd gS:

(a) gm (b) rd

(c) m

d

gr ¼d½ m dg r

101. ,d flfyd‚u fu;af=r djusokyk ds vkxs vo#) {ks= esa] ,llhvkj gS

(a) In the off – state (b) In the on - state(c) Reverse Biased (d) At the point of breakdown

102. ,d vkbZlh /kkrq /kkrq:i ds fy, vke rkSj ij bLrseky esa çLrko

(a) Cu (b) Fe

(c) Zn (d) Al

103. 2A dh ,d vk/kk ygj 'kq) lefer oxZ rjax orZeku n vkj,e,l ewY;

gS&

(a) 2 A (b) 1A

(c) 1 A2 ¼d½ 3 A

104. ,d vke emitter ,EiyhQk;j ds emitter esa ,d vojks/k dk ifjp;

fLFkj Mh-lh esa cnyko ds f[kykQ v‚ijsfVax fcanq:

(a) dsoy rkieku

(b) dsoy VªkUtsLVªj ds ij

(c) nksuksa rkieku vkSj ij


105. emitter çfrjks/k RE ds lkFk ,d vke emitter ,EiyhQk;j ds buiqVçfrck/kk dk vuqekfur ewY;

(a) ie 1 Eh A R (b) ie fe Eh 1 h R

(c) ieh ¼d½ fe E1 h R

106. fuEufyf[kr foU;kl esa ls fdlls vf/kdre xsg fojFk xq.ku vf/kdre çnku

djrk gS \

(a) common-base amplifier(b) cascode amplifier(c) differential amplifier(d) cascade amplifier

99. An increase in the base recombination of a BJT willincrease

(a) the common emitter dc current gain

(b) the breakdown voltage CEOBV(c) the unity-gain cut-off frequency Tf

(d) the transconductance mg

100. In FET, amplification factor is :(a) gm (b) rd

(c) m

d

gr (d) m dg r

101. In the forward blocking region of a silicon controlledrectifier, the SCR is(a) In the off – state (b) In the on - state(c) Reverse Biased (d) At the point of breakdown

102. In an IC metal used normally for metallization propose is(a) Cu (b) Fe(c) Zn (d) Al

103. The RMS value of a half-wave rectifier symmetrical squarewave current of 2A is :

(a) 2 A (b) 1A

(c) 1 A2 (d) 3 A

104. Introducing a resistor in the emitter of a common emitteramplifier stabilizes the d.c. operating point against variationsin :(a) Only the temperature(b) Only the of transistor(c) Both the temperature and (d) None of these

105. The approximate value of input impedance of a commonemitter amplifier with emitter resistance RE is given by

(a) ie 1 Eh A R (b) ie fe Eh 1 h R

(c) ieh (d) fe E1 h R

106. Which of following configuration provides m a x i m u mgain – bandwidth product ?(a) common-base amplifier(b) cascode amplifier(c) differential amplifier(d) cascade amplifier


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BSNL-TTA Mock Test Paper - 1107. ,d ls'ku& amp fn, x, fp= esa fn[kk;k x;kA

iR

FR

oViV

(a) voltage-series feedback(b) voltage-shunt feedback(c) current-shunt feedback(d) current-series feedback

108. izSfDVdy vkWflysVj esa |A| dk eku gksrk gS

(a) ,d ls FkksM+k de

(b) ,d ds cjkcj

(c) 'kwU; cjkcj

(d) ,d ls FkksM+k vf/kd

109. ,d ,EiyhQk;j DB esa ;g ykHk gksxk 50 lky dh ,d 'kfä ds ykHk

(a) 17dB (b) 31dB

(c) 34dB (d) 68dB

110. ,d vkbfM;y OP-AMP ,d vkbfM;y

(a) oksYVst fu;af=r fo|qr lzksr

(b) oksYVst fu;af=r oksYVst lzksr

(c) fo|qr fu;af=r fo|qr lzksr

(d) fo|qr fu;af=r oksYVst lzksr

PART III : SPECIALIZATION – 90 MARKS

111. iai HkaMkj.k iufctyh la;a= esa fctyh dh e'khu tujsVj vkSj eksVj ds :i

esa ckjh&ckjh ls dke djus ds fy, cuk;k x;k gSA tujsVj dh n{krk esa ,d

gh fo|qr 'kfä Lrj ij dke dj jgs gS fd eksVj ds :i esa

(a) eksVj ls vf/kd

(b) eksVj ds leku

(c) eksVj ls de

(d) eksVj ls de ;k T;knk gksrk gS tks e'khu ds izdkj ij fuHkZj djrkgSA

112. ftl ij fuEufyf[kr pØ dk ,d ,d vk/kqfud Hkki fctyh la;a= dke djrk

gS\

(a) dkuksZV pØ (b) Rankine pØ

(c) vksVks pØ (d) csy&dksyeSu pØ

107. An OP-AMP shown in the given Fig. has :

iR

FR

oViV

(a) voltage-series feedback(b) voltage-shunt feedback(c) current-shunt feedback(d) current-series feedback

108. In a practical oscillator |A| is :(a) slightly less than 1

(b) equal to 1

(c) equal to 0

(d) slightly greater than 1

109. An amplifier has a power gain of 50. This gain in dB willbe :(a) 17dB (b) 31dB(c) 34dB (d) 68dB

110. An ideal OP-AMP is an ideal :(a) voltage controlled current source(b) voltage controlled voltage source(c) current controlled current source(d) current controlled voltage source

PART III : SPECIALIZATION – 90 MARKS

111. In pump storage hydropower plant, the electrical machineis made to work alternately as generator and motor. Theefficiency of the generator working at the same electricalpower level is

(a) Greater than that as motor

(b) Equal to that as motor

(c) Less than that as motor

(d) Greater or less than that as motor depending on thetype of the machine

112. On which one of the following cycles does a modern steampower plant work?

(a) Carnot cycle (b) Rankine cycle

(c) Otto cycle (d) Bell-Coleman cycle



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113. ,d ikoj LVs'ku dk IykaV yksM QSDVj

(a) ds ÅtkZ jk'ku vf/kdre ÅtkZ dh gS fd

(b) ihd yksM

(c) ihd yksM

(d) ds fy, U;wure yksM djus ds fy, vkSlr yksM mRiUu fd;k tk ldrk

Fkk djus ds fy, mRiUu ds :i esa ifjHkkf"kr fd;k x;k gS U;wure vkSlr

yksM djus ds fy, yksM

114. gkbMªks ikoj LVs'kuksa esa D;k dgk tkrk gS flQZ lsou ls Åij ikuh ds c<+s

gq, 'kjhj gS vkSj ,d fofu;eu tyk'k; ds :i esa ç;ksx fd;k tkrk gS\

(a) Spillways (b) Forebay

(c) Reservoir (d) Penstock

115. ,d fuf'pr var çkIr djus vkSj ,d ikjs"k.k ç.kkyh esa var oksYVst Hkst

jgk gS] D;k dj jgk gS yxkrkj fctyh dk fBdkuk gS\

(a) ,d lh/kh js[kk (b) ,d nh?kZo`Ùk

(c) ,d ijoy; (d) ,d pØ

116. tc yacs vksojgsM ykbuksa ij QsjkUrh çHkko dk vuqHko fd;k gS\

(a) ykbu gYds ls Hkjh gqbZ gS

(b) ykbu Hkkjh yksM fd;k tkrk gS

(c) ykbu iwjh rjg Hkjh gqbZ gS

(d) ikoj QSDVj ,drk gS

117. lHkh vuqØe ,d fctyh O;oLFkk esa QkWYV fcanq ij cjkcj gSa]

rks QkWYV ,d

(a) rhu pj.k QkWYV gS

(b) ykbu ls xzkm.M dk QkWYV

(c) ykbu ls ykbu dk QkWYV

(d) Mcy ykbu ls xzkm.M dk QkWYV

118. dkSu lk dusD'ku ds çdkj ds LVkj MsYVk dh lqj{kk ds fy, orZeku VªkalQ‚eZj

ds fy, dk;Zjr gS tqM+k 3 pj.k VªkalQkeZj\

(a) MsYVk MsYVk (b) LVkj&LVkj

(c) LVkj MsYVk (d) MsYVk&LVkj

119. CB ds ilanhnk çdkj vfrfjä mPp oksYVst ,lh flLVe esa LFkkfir gksus

ds fy, D;k gS\

(a) Fkksd rsy çdkj CB

(b) ,;j CykLV CB

(c) oSD;we CB

(d) lYQj gsDlk¶yksjkbM CB

113. A power station’s plant load factor is defined as the rationof

(a) The energy generated to that of maximum energy thatcould have been generated

(b) Average load to peak load

(c) Minimum load to peak load

(d) Minimum load to average load

114. In hydro power stations, what is an enlarged body of waterjust above the intake and used as a regulating reservoir,called?(a) Spillways (b) Forebay(c) Reservoir (d) Penstock

115. For a fixed receiving end and sending end voltage in atransmission system, what is the locus of the constantpower?(a) A straight line (b) An ellipse(c) A parabola (d) A circle

116. When is the Ferranti effect on long overhead linesexperienced?(a) The line is lightly loaded(b) The line is heavily loaded(c) The line is fully loaded(d) The power factor is unity

117. If all the sequence voltages at the fault point in a powersystem are equal, then the fault is a(a) Three-phase fault(b) Line to ground fault(c) Line to line fault(d) Double line to ground fault

118. Which type of connection is employed for currenttransformers for the protection of star-delta connected 3-phase transformer?(a) Delta-delta (b) Star-star(c) Star-delta (d) Delta-star

119. What is the preferred type of CB to be installed in extrahigh voltage ac system?(a) Bulk oil type CB(b) Air blast CB(c) Vacuum CB(d) Sulphur hexafluoride CB


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BSNL-TTA Mock Test Paper - 1120. tks ds fy, eksVlZ ds fuEufyf[kr çdkj ls ,d gS] fLFkjrk ds fy, cjkcj&{ks=

dlkSVh ij ykxw gksrk gS\

(a) rhu pj.k rqY;dkfyd eksVj

(b) rhu pj.k çsj.k eksVj

(c) Mh-lh J`a[kyk eksVj

(d) Mh-lh- ds ;kSfxd eksVj

121. gkbZ oksYVst D.C. Vªkalfe'ku ds fy,

(a) Current harmonics on A.C.side and voltageharmonics on D.C.side

(b) Voltage harmonics on A.C. side and currentharmonics on D.C. side

(c) Voltage harmonics on both A.C. side and D.C.sides

(d) Current harmonics on both A.C. and D.C. sides

122. tc ,d thyristor ds dSFkksM vkSj vf/kd ldkjkRed gS fd blds ,uksM

(a) lHkh taD'kuksa fjolZ i{kikrh

(b) ckgjh taD'ku gSa fjolZ i{kikrh vkSj e/; ,d vkxs >qdk gqvk gS

(c) ckgjh taD'ku dj jgs gSa vkxs >qdk vkSj e/; ,d fjolZ gS cuk gS

i{kikrh

(d) lHkh taD'kuksa vkxs jgs gSa

123. ,d ,dy pj.k nks iYl duoVZj vi;kZIr lejs[k.k ds lkFk ,d vkj ,y

yksM f[kykrh gS ysfdu pkyu fujarj gSA yksM lfdZV ds çfrjks/k c<+ tkrh

gS] rks

(a) yksM djUV ds fjIy dUVsUV ,d gh jgsxkA

(b) yksM djUV dh fjIy dUVsUV esa deh gksxhA

(c) yksM djUV esa fjIy dUVsUV dh o`f) gksxh A

(d) ogk¡ fjIy dUVsUV esa o`f) ds dkj.k vlarr pkyu dh laHkkouk gSA

124. vkns'k esa ,d duoVZj VªkalQkeZj ds fMtkbu dks vklku cukus ds fy,] ,d

nksgjh duoVZj esa nks dUoVZlZ dk mi;ksx dj tksM+k tkuk pkfg,:

(a) J`a[kyk dusD'ku

(b) Ø‚l [kaM

(c) Mk;jsDV fojks/kh lekukarj dusD'ku

(d) fojks/kh lekukarj dusD'ku

120. For which one of the following types of motors, is the equal-area criterion for stability applicable?(a) Three-phase synchronous motor(b) Three-phase induction motor(c) D.C. series motor(d) D.C. compound motor

121. High voltage transmission requires filters for

(a) Current harmonics on A.C.side and voltage harmonicson D.C.side

(b) Voltage harmonics on A.C. side and current harmonicson D.C. side

(c) Voltage harmonics on both A.C. side and D.C.sides

(d) Current harmonics on both A.C. and D.C. sides

122. When cathode of a thyristor is made more positive that itsanode

(a) all the junctions are reverse biased

(b) outer junctions are reverse biased and central one isforward biased

(c) outer junction are forward biased and central one isreverse biased

(d) all the junctions are forward

123. A single-phase two pulse converter feeds an R-L load withinsufficient smoothing but the conduction is continuous.If the resistance of the load circuit is increased, then

(a) the rippes content of the load current will remain thesame.

(b) the ripple content of the load current will decrease.

(c) the ripple content of the load current will increase.

(d) there is possibility of discontinuous conduction due toan increase in the ripple content.

124. In order to simplify the design of a converter transformer,the two converters in a dual converter should be connectedusing:(a) Series connection(b) Cross section(c) Direct anti-parallel connection(d) Anti-parallel connection



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125. ,d buoVZj çsj.k eksVj ds lapkyu dks eksVfjax ls iquZ;ksZth LFkkukarfjr cszsfdax

esa dSls ifjofrZr fd;k tk ldrk gSA

(a) fjoZflax ¶tsl flDoSUl

(b) bUoVZj oksYVst ?kVkdj

(c) bUoVZj vko`fÙk ?kVkdj

(d) bUoVZj vko`fÙk c<+kdj

126. vko`r fMVsDVj D;k gSA

(a) rqY;dkfyd fMVsDVj

(b) vrqY;dkfyd fMVsDVj

(c) mRikn demodulator

(d) coherent fMVsDVj gS

127. Vhoh çlkj.k esa /ofu ladsr fdl izdkj ekWM~;wVsy gksrk gSA

(a) SSB (b) VSB

(c) FM (d) DSB-S

128. Mk;oflZVh fjlsI'ku iz;ksx fd;k tkrk gS

(a) fjlhoj laosnu'khyrk dks c<+kus esa

(b) fjlhoj laosnu'khyrk dks lq/kkjus esa

(c) eUnu ds vi{kh.ku izHkko dks dkcw djus ds fy,

(d) fjlhoj detuning ds vi{kh.ku izHkko dks dkcw djus ds fy,

129. OgkbZV ukWbt dh o.kZØeh; ?kuROk D;k gSA

(a) vko`fÙk ds lkFk cnyrk jgrk gS

(b) fujarj jgrk gS

(c) cSaMfoM~Fk ds lkFk cnyrh gS

(d) finite

130. ,d ihlh,e ç.kkyh esa çR;sd Lrj quantisation 8 fcV esa budksfMax gSAquantisation 'kksj vuqikr djus ds fy, ladsr ds cjkcj gS

(a) 37 dB (b) 48 dB

(c) 64 dB (d) 256 dB

131. dksM gS tks lerk tkap ds fy, çnku djrk gS

(a) Baudot (b) ASCII

(c) EBCDIC (d) Excess-3

132. lwph& I dks lwph& II ¼ç;kstu½ ds lkFk ¼digitial lapkj ç.kkyh esa rduhddksfMax½ vkSj lwfp;ksa ds uhps fn, x, dksM dk ç;ksx dj lgh mÙkj dk p;u:

List I List IIA. Huffman code 1. vfrjsd ds vUewyu

B. Error correcting code 2. chV jsV de dj nsrk gSA

C. NRZ-coding 3. ykbZu ds fy, lapkfjr ladsr ds vuqdwy

D. Delta modulation 4. pSuy dksfMax

125. The operation of an inverter fed induction motor can beshifted from motoring to regenerative braking by(a) reversing phase sequence(b) reducing inverter voltage(c) decreasing inverter frequency(d) increasing inverter frequency

126. The envelop detector is a/an(a) synchronous detector(b) asynchronous detector(c) product demodulator(d) coherent detector

127. The sound signal in TV broadcast is modulated in(a) SSB (b) VSB(c) FM (d) DSB-SC

128. Diversity reception is used to(a) increase receiver sensitivity(b) improve receive selectivity(c) overcome degrading effect of fading(d) overcome degrading effect of receiver detuning.

129. The spectral density of white noise(a) varies with frequency

(b) is constant

(c) varies with bandwidth

(d) is finite

130. In a PCM system each quantisation level is encoded into8 bits. The signal to quantisation noise ratio is equal to

(a) 37 dB (b) 48 dB

(c) 64 dB (d) 256 dB

131. The code which provides for parity check is

(a) Baudot (b) ASCII

(c) EBCDIC (d) Excess-3

132. Match List I (Coding Technique in Digitial communicationSystems) with List II (Purpose) and select the correctanswer using the code given below the lists :

List I List II

A. Huffman code 1. Elimination of redundancy

B. Error correcting code 2. Reduces bit rate

C. NRZ-coding 3. Adapts the transmitted

signal to the lineD. Delta modulation 4. Channel coding


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BSNL-TTA Mock Test Paper - 1Code :

A B C D

(a) 1 2 3 4(b) 3 4 1 2

(c) 1 4 3 2

(d) 3 2 1 4

133. fuEufyf[kr esa ls dkSu lfdZV esa ls ,d ,d fn'kk esa igqapkrk nks lans'k ,d

lkFk

(a) Duplex (b) Diplex

(c) Simplex (d)Quadruplex

134. ifji= ygj xkbM ds tks eksM ifji= le:irk gS\

(a) TE11 (b) TE11 and TE21

(c) TE01 (d) TE01 and TM01

135. ,d Vh-vkj- ¼VªkalehVj fjlhoj½ Vîwc gS

(a) de fctyh dk ladsr gS vkSj mPp ds fy, de uqdlku

(b) de fctyh dk ladsr gS vkSj mPp Lrj ds ladsr ds fy, de uqdlku

ds fy, mPp uqdlku

(c) nksuksa fuEu Lrj vkSj mPp Lrj ds ladsrksa ds fy, de uqdlku

(d) nksuksa fuEu Lrj vkSj mPp Lrj ds ladsrksa ds fy, mPp uqdlku

136. ,d nks canjxkg usVodZ esa] ,p&ekudksa ds lanHkZ esa gkyr ikjLifjdrk gS: &

(a) h12 = h21 (b) h11 = h22

(c) h12 = – h21 (d) h11 = – h22

137. 2&canjxkg usVodZ uhps fn, x, lfdZV esa fn[kk;k x;k gS ,d vkSj

2&canjxkg usVodZ gS ftlds lkFk lekukarj esa tqM+k gqvk gS

11 22 12 21y y y y Y

gV1

V1

lexz usVodZ ds &parameters tks fuEu esa ls ,d dks larq"V djuk gksxk\

(a) 11y Y g (b) 12y Y g

(c) 21y Y g ¼d½ 22y Y g

Code :

A B C D(a) 1 2 3 4(b) 3 4 1 2

(c) 1 4 3 2

(d) 3 2 1 4

133. Which one of the following circuits transmits two messagessimultaneously in one direction

(a) Duplex (b) Diplex

(c) Simplex (d) Quadruplex

134. Which modes of circular wave guides have circular

symmetry?

(a) TE11 (b)TE11 and TE21

(b) TE01 (b) TE01 and TM01

135. A TR (transmitter receiver) tube has

(a) low loss for low power signals and high

(b) high loss for low power signals and low loss for high

level signal

(c) low loss for both low level and high level signals

(d) high loss for both low level and high level signals

136. In a two port network, the condition reciprocity in termsof h-parameters is:-

(a) h12 = h21 (b) h11 = h22(c) h12 = – h21 (d) h11 = – h22

137. The 2-portnetwork shown in the circuit given below isconnected in parallel with another 2-port network whichhas 11 22 12 21y y y y Y

gV1

V1

The -parameters of the composite network will satisfywhich one of the following?(a) 11y Y g (b) 12y Y g

(c) 21y Y g (d) 22y Y g



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138. çfrjks/k vkj] vf/k"Bkiu ,y] lekbZ lh vkSj çokgdÙo th okys ,d ykbu

dh fo'ks"krk çfrck/kk D;k gS\

(a) R j LG j C (b)

G j CR j L

(c) GR j LC

¼d½ 2

2 1R LC

139. leku yEckbZ dh 440 kV ykbu ds fy, vkos'k /kkjk 220 kV ykbu ls

vf/kd gksrh gSA dFku&

(a) lR; gSa (b) vlR; gSa

(c) lR; ;k vlR; gSaa (d) buesa ls dksbZ ugha

140 nks leku igys ds vkns'k dks uqdlku ikl fQYVj cascaded jgs gSa ;fn

xSj&lgHkkxh] rks lexz fQYVj dh bdkbZ dne çfrfØ;k gksxh

(a) Critically damped (b) Under-damped

(c) Over-damped (d) Oscillatory

141. ,d ljy djusokyk ds oksYVst gLrkarj.k lekjksg gS

(a) ,d ifjfer 'kwU; vkSj vuar ij ,d iksy

(b) ,d ifjfer 'kwU; vkSj ewy esa ,d iksy

(c) ewy esa ,d 'kwU; vkSj ,d ifjfer iksy

(d) bfUQfuVh esa ,d 'kwU; vkSj ,d ifjfer iksy

142. yackbZ 37.5 lseh ds lapj.k ykbu gS] tks 'kwU; çfrjks/k esa lekIr gksrk gSA

bl ykbu 1 xhxkgVZ~t dk ,d lzksr gS tks 50 W. D;k ykbu ds buiqVçfrck/kk ds :i esa lzksr ls ns[kk gS dh ,d vkarfjd çfrck/kk ls ckgj

fudy tk jgk gS\

(a) 50W (b) Zero W

(c) 100 W (d) vuar W

143- nh vkadM+k iksy&'kwU; ,l foeku esa ,d fQYVj ds iSVuZ ls irk pyrk gSA

fQYVj ,d gS&

××

×

××

×

jn

n

n

s–plane

(a) cSaM mUewyu fQYVj (b) cSaM ikl fQYVj

(c) de ikl fQYVj (d) mPp ikl fQYVj

138. What is the characteristic impedance 0Z of a linehaving resistance R, inductance L, capacitance C andconductance G?

(a)R j LG j C (b)

G j CR j L

(c)GR j LC

(d) 2

2 1R LC

139. The charging current of a 440 kV line is more than thanof a 220 kV line of the same length(a) True (b) False(c) Either true or false (d) None of the above

140. If two identical first order loss-pass filters are cascadednon-interactively, then the unit step response of thecomposite filter will be(a) Critically damped (b) Under-damped(c) Over-damped (d) Oscillatory

141. Voltage transfer function of a simple integrator has(a) A finite zero and a pole at infinity(b) A finite zero and a pole at the origin(c) A zero at the origin and a finite pole(d) A zero at infinity and a finite pole

142. Consider the transmission line of length 37.5 cm, which is

terminated into zero resistance. This line is being exited by a

source of 1 GHz which has an internal impedance of 50 W.

What is the input impedance of the line as seen by the source?

(a) 50W (b) Zero W(c) 100 W (d) Infinite W

143. The given figure shows the pole-zero pattern of a filter inthe s-plane. The filter is a:

××

×

××

×

jn

n

n

s–plane

(a) Band elimination filter (b) Band-pass filter(c) Low-pass filter (d) High-pass filter


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BSNL-TTA Mock Test Paper - 1144- R, L, C vkSj G Øe'k% çfrjks/k] vf/k"Bkiu] lekbZ vkSj ,d lapj.k ykbu

ds çokgdÙo gS] rks fo:i.k de lapj.k ykbu ds fy, 'krZ

(a) (b) RC = LG

(c) (d)

145- ,d rks ,d nwljs Øe gLrkarj.k lekjksg ,Q ¼,l½ ds va'k ,d fLFkj gS]

rks fQYVj gS

(a) cSaM ikl fQYVj (b) cSaM jksd fQYVj

(c) mPp ikl fQYVj (d) de ikl fQYVj

146. fuEufyf[kr esa ls ,d fctyh ds de ikl

(a) RCS

1 RCS (b) 1

1 RCS

(c) RC

1 RCS (d) S

1 RCS

147- ,d lefer tkyh fQYVj] dh ç—fr vkSj tgka ds ikl cSaM esa vkSj J`a[kyk

gkFk ds reactances vkSj fod.kZ gkFk çfrfuf/kRo dh tkyh dh gS

(a) ,d gh gLrk{kj

(b) foijhr gLrk{kj

(c) ,d gh ladsr gS vkSj cjkcj ifjek.k

(d) euekus <ax ls gLrk{kj dh

148- 8 fcV dk ,d laxzg dgk tkrk gS

(a) ckbV (b) 'kCn

(c) fjd‚MZ (d) nibble

149- vkjksgh Øe ;k ,d MsVk inkuqØe gS

(a) bit - bytes - fields - record - file - database

(b) bit - bytes - record - field - file - database

(c) bytes - bit- field - record - file - database

(d) bytes -bit - record - field - file - database

150- fdrus irk ykbuksa 2048 x 4 eseksjh fpi esa çR;sd Le`fr LFkkuksa dks

lacksf/kr djus dh t:jr gS\

(a) 10 (b) 1 1

(c) 8 (d) 12

151. ,d daI;wVj çksxzke gS fd ,d le; esa e'khu Hkk"kk esa ,d iwjs dk;ZØe

/kekZUrfjr dgk tkrk gS

(a) nqHkkf"k;k (b) flE;qysVj

(c) ladyd (d) dekaMj

144. If R, L, C and G are the resistance, inductance, capacitanceand conductance of a transmission line respectively, thenthe condition for distortion less transmission line is

(a) (b) RC = LG

(c) (d)

145. If the numerator of a second-order transfer function F(s)is a constant, then the filter is a

(a) Band-pass filter (b) Band-stop filter

(c) High-pass filter (d) Low-pass filter

146. Which one of the following is the transfer function of anelectrical low-pass filter using and elements?

(a) RCS

1 RCS (b) 1

1 RCS

(c) RC

1 RCS (d) S

1 RCS

147. In the pass band of a symmetric lattice filter, the nature ofand where and represent the reactances of the seriesarm and the diagonal arm of the lattice is of

(a) The same sign

(b) The opposite sign

(c) The same sign and equal magnitude

(d) Of arbitrary sign

148. A collection of 8 bits is called

a byte (b) word

(c) record (d) nibble

149. The ascending order or a data Hierarchy is

(a) bit - bytes - fields - record - file - database

(b) bit - bytes - record - field - file - database

(c) bytes - bit- field - record - file - database

(d) bytes -bit - record - field - file - database

150. How many address lines are needed to address eachmemory locations in a 2048 x 4 memory chip?

(a) 10 (b) 11

(c) 8 (d) 12

151.A computer program that converts an entire program intomachine language at one time is called a/an

(a) interpreter (b) simulator

(c) compiler (d) commander



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152- rRdky esa ladk;Z dks lacksf/kr fd;k x;k gS

(a) lhih;w jftLVj esa

(b) vksih dksM dks bUVª sa'ku ds ckn

(c) eSeksjh esa

(d) LVsd esa

153- ekbØksçkslslj 8085 rd LFkku dk irk dj ldrs

(a) 32K (b) 128K

(c) 64K (d) 1M

154. microcomputer s ds vf/kdka'k ds ALU vkSj fu;a=.k bdkbZ la;qä vkSj

,d flfyd‚u fpi ij fuekZ.k dj jgs gSa bls D;k dgrs gS\

(a) monochip (b) ekbØksçkslslj

(c) ALU (d) fu;a=.k foHkkx

155- tc miusedk ds var esa RET vuqns'k fu"ikfnr gksrk gS ]

(a) tkudkjh dks tgkW LVsd esa iniatialized fd;k tkrk gS mls LVsd lwpddks lkSai fn;k gS

(b) vkjbZVh bUVªs'klu dk eSeksjh irk izksxzke dkmaVj dks lkSai fn;k gS

(c) LVsV ds 'kh"kZ nks LFkkuksa esa laxzghr nks MsVk ckbV~l izksxzke dkmUVj dkslkSSi fn;k tkrk gSA

(d) <sj ds 'kh"kZ nks LFkkuksa esa laxzghr nks MsVk ckbV~l LVsd lwpd dks lkSifn;k tkrk gS

156- ,d microporgram sequencer dkjZokbZ djrs gS

(a) read (b) execute

(c) read and write (d) read and execute

157- Interrupts tks ,d I/O Mªkbo dh vksj ls 'kq: dj jgs gSa

(a) vanj dk (b) ckgjh

(c) l‚¶Vos;j (d) Åij ds lHkh

158. lHkh daI;wVjksa dk çkslslj] pkgs lw{e] y?kq ;k esuÝse gksuh pkfg,

(a) ALU (b) çkjafHkd HkaMkj.k

(c) fu;a=.k foHkkx (d) Åij ds lHkh

159- CPU esa fu;a=.k bdkbZ ds dk;Z D;k gS\

(a) çkFkfed HkaMkj.k djus ds fy, MsVk LFkkukarfjr djus ds fy,

(b) nqdku dk;ZØe vuqns'k

(c) rdZ dkjZokbZ djus ds fy,

(d) dk;ZØe vuqns'k fMdksM djus ds fy,

152. In immediate addressing the operand is placed

(a) in the CPU register(b) after OP code in the instruction(c) in memory

(d) in stack

153. Microprocessor 8085 can address location upto

(a) 32K (b) 128K

(c) 64K (d) 1M

154. The ALU and control unit of most of the microcomputersare combined and manufacture on a single silicon chip.What is it called?

(a) monochip (b) microprocessor

(c) ALU (d) control unit

155. When the RET instruction at the end of subroutine isexecuted,

(a) the information where the stack is iniatialized istransferred to the stack pointer

(b) the memory address of the RET instruction istransferred to the program counter

(c) two data bytes stored in the top two locations of thestack are transferred to the program counter

(d) two data bytes stored in the top two locations of thestack are transferred to the stack pointer

156. A microporgram is sequencer perform the operation

(a) read (b) execute

(c) read and write (d) read and execute

157. Interrupts which are initiated by an I/O drive are

(a) internal (b) external

(c) software (d) all of above

158. Processors of all computers, whether micro, mini ormainframe must have

(a) ALU (b) Primary Storage

(c) Control unit (d) All of above

159. What is the control unit’s function in the CPU?

(a) To transfer data to primary storage

(b) to store program instruction

(c) to perform logic operations

(d) to decode program instruction


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BSNL-TTA Mock Test Paper - 1160- D;k ,d lefiZr daI;wVj dk eryc gS\

(a) tks ,d O;fä }kjk ç;ksx fd;k tkrk gS dsoy

(b) ,d vkSj flQZ ,d gh dke dks lkSaik gS tks

(c) tks l‚¶Vos;j esa ls ,d rjg dk gksrk gS

(d) vuqç;ksx l‚¶Vos;j ds fy, gh gksrh gS tks

161. lcls vke dks lacksf/kr ,d lhih;w }kjk fu;ksftr rduhd gS

(a) rRdky (b) çR;{k

(c) vçR;{k (d) Åij ds lHkh

162- ikbiykbu dks ykxw

(a) QSt ykus ds funsZ'k

(b) MhdkWM funsZ'k

(c) ladk;Z dh x.kuk

(d) Åij ds lHkh

163- pkj vkdkj dh Le`fr fpIl mudk irk clksa dks ,d lkFk tqM+k gqvk gSA bl

ç.kkyh ds vkdkj dk gks tk,xkA

(a) 64 4 (b)16 16

(c) 32 8 ¼d½ 256 1

164- ,d ekbØksçkslslj ALU gS

(a) vkSj ,d ,dy fpi ij fu;a=.k bdkbZ

(b) vkSj ,d ,dy fpi ij Le`fr

(c) jftLVj bdkbZ vkSj ,d ,dy fpi ij vkbZ / vks fMokbl

(d) jftLVj bdkbZ vkSj ,d ,dy fpi ij fu;a=.k bdkbZA

165- ,d ekbØksçkslslj ds vk/kkj ij ,d ,u&fcV ekbØksçkslslj dgk tkrk gS

(a) jftLVj yackbZ

(b) vkarfjd MsVk cl ds vkdkj

(c) ckgjh MsVk cl ds vkdkj


166- ekbØks çkslslj vkSj Le`fr ds chp rqY;dkyu }kjk fd;k tkrk gS

(a) INTR (b) register

(c) ALE (d) buesa ls dksbZ ugha

167- ,d ekbØksçkslslj ds cqfu;knh rRo gSa

(a) ALU] Le`fr

(b) ALU] fu;a=.k bdkbZ

(c) ALU] Le`fr] I/O fMokbl

(d) ALU] fu;a=.k bdkbZ] Le`fr

160. What is meant by a dedicated computer?

(a) which is used by one person only

(b) which is assigned to one and only one task

(c) which does one kind of software

(d) which is meant for application software only

161. The most common addressing techniques employed by aCPU is

(a) immediate (b) direct

(c) indirect (d) all of the above

162. Pipeline implement

(a) fetch instruction

(b) decode instruction

(c) calculate operand

(d) all of above

163. Four memory chips of size have their address busesconnected together. This system will be of size.(a) 64 4 (b) 16 16

(c) 32 8 (d) 256 1

164. A microprocessor is ALU

(a) and control unit on a single chip

(b) and memory on a single chip

(c) Register unit and I/O device on a single chip

(d) Register unit and control unit on a single chip.

165. A microprocessor is called an n-bit microprocessor

depending on

(a) Register length

(b) Size of internal data bus

(c) Size of external data bus

(d) None of these

166. The synchronization between micro-processor and memoryis done by

(a) INTR (b) register

(c) ALE (d) None of these

167. The basic elements of a microprocessor are

(a) ALU, memory

(b) ALU, control unit

(c) ALU, memory, I/O device

(d) ALU, control unit, memory



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168. In microprocessor architecture, flag indicates

(a) The number of microprocessor.

(b) The name of the manufacturer.

(c) The internal status of the CPU.

(d) The bit-size of the microprocessor.

169. The computer program which converts statements writtenin high level language to object code is known as:

(a) Assembler

(b) Operating System

(c) Object-oriented software

(d) None of the above

170. Flag bits in arithmetic unit provide:

(a) Status type information

(b) Repeatability

(c) Facilities for rechecks

(d) All of the above

171. An address is used by the CPU to specify location in:

(a) Memory (b) Program counter

(c) Accumulator (d) Stack pointer

172. The data bus in 8080A/8085 microprocessor is a group of:

(a) Eight bidirectional lines that are used to transfer 8 -bits between the microprocessor and its I/O andmemory.

(b) Eight lines used to transfer data among the registers.

(c) Eight unidirectional lines that are used for I/O devices.

(d) Sixteen bidirectional lines that are used for data transferbetween the microprocessor and memory.

173. What is incorrect for 8085?

(a) 8085 generates a RD signal when it has to performread operation.

(b) 8085 generates a WR signal when it has to performwrite operation

(c) 8085 generates RD and WR signal together when ithas to perform read and write operation simultaneously

(d) None of above

174. Microcontroller must have atleast:

(a) microprocessor, memory, I/O

(b) microprocessor, I/O on a chip

(c) microprocessor, memory on a chip

(d) microprocessor, I/O, memory on a chip

168- ekbØksçkslslj okLrqdyk esa] /ot bafxr djrk gS

(a) ekbØksçkslslj dh la[;kA

(b) fuekZrk dk ukeA

(c) lhih;w dh vkarfjd fLFkfrA

(d) ekbØksçkslslj dk lk vkdkjA

169- daI;wVj çksxzke gS tks mPp Lrj dh Hkk"kk dksM vkifÙk djus esa fyf[kr c;ku

/kekZUrfjr ds :i esa tkuk tkrk gS:

(a) vlsacyj

(b) v‚ijsfVax flLVe

(c) oLrq mUeq[k l‚¶Vos;j

(d) mijksä esa ls dksbZ

170. xf.kr bdkbZ esa >aMk fcV~l çnku djrs gSa

(a) fLFkfr çdkj dh tkudkjh

(b) Repeatability

(c) rechecks lqfo/kk

(d) mijksä lHkh

171- ,d Hkk"k.k esa LFkku fufnZ"V djus ds fy, lhih;w }kjk bLrseky fd;k tkrk

gS

(a) eseksjh (b) dk;ZØe dkmaVj

(c) lapk;d (d) lwpd <sj

172. 8080A / 8085 ekbØksçkslslj esa MsVk cl dk ,d lewg gS&

(a) vkB f}fn'k ykbuksa gS fd 8 gLrkarj.k djus ds fy, bLrseky dj jgS gSa &

ekbØksçkslslj vkSj blds fy, eSa I/Os vkSj Le`fr ds chp fcV~lA

(b) vkB ykbuksa jftLVjksa ds chp MkVk gLrkarj.k djus ds fy, ç;ksx fd;k tkrk gSA

(c) vkB fn'kkghu ykbuksa gS fd eSa I/Os midj.kksa ds fy, mi;ksx fd;k tkrk gSA

(d) lksyg f}fn'k ykbuksa gS fd ekbØksçkslslj vkSj Le`fr ds chp MkVk gLrkarj.k ds fy,

mi;ksx fd;k tkrk gSA

173- D;k 8085 ds fy, lgh ugha gS\

(a) 8085 ds fy, ,d ladsr gS tc ;g RD dkjZokbZ djus ds fy, gS

mRiUu djrk gSA

(b) 8085 ds fy, ,d ladsr mRiUu djrk gS tc bls WR s dkjZokbZ djus

ds fy, gS

(c) 8085 mRiUu djrk gS vkSj ,d lkFk ladsr tc ;g RD vkSj WR,d lkFk fy[k fn;k gS

(d) mijksä esa ls dksbZ

174- Microcontroller de ls de gksuk pkfg,

(a) ekbØksçkslslj] Le`fr] I/O

(b) ekbØksçkslslj] I/O ,d fpi ij gs

(c) ekbØksçkslslj] ,d fpi ij Le`fr

(d) ekbØksçkslslj] I/O] ,d fpi ij Le`fr


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BSNL-TTA Mock Test Paper - 1175. If the unit step response of a system is a unit impulse

function. Then the transfer function of such a system willbe :(a) 1 (b) 1/s(c) s (d) 1/s2

176. Basic properties of SFG:(a) SFG is application to linear system only(b) The algebraic equations must in the form of cause the

effect relationship.(c) Nodes are arranged from left to right in a sequence.(d) All of these

177. A system is critically dampe(d) Now if the gain of thesystem is increased the system will be have as:(a) over damped (b) under damped(c) oscillatory (d) critically damped

178. Consider a unity feedback function

KG(s)s(s 1)

The steady state error of the system due to a velocityinput is :(a) zero (b) K(c) 1/K (d) infinite

179. The system having the characteristic equation will be stablefor :(a) K > 6 (b) 0 < K < 6(c) 6 < K < 10 (d) 0 < K < 10

180. A control system has

k(s 1)G(s)H(s)s(s 3)(s 4)

The root locus of the system can lies on the real axis:(a) between s = – 1 & s = – 3(b) between s = 0 & s = – 4(c) between s = – 3 & s = – 4(d) towards left of s = – 4

181. If the open loop transfer function is a ratio of a numeratorpolynomial of degree ‘m’ and a denominator polynomial ofdegree ‘n’, then the integar (n – m) represents the numberof :(a) Breakaway points(b) Unstable poles(c) Separate root loci(d) Asymptotes

175- vxj ,d ç.kkyh dh bdkbZ dne çfrfØ;k ,d bdkbZ ds vkosx lekjksg gSA

fQj ,d ,slh ç.kkyh ds gLrkarj.k lekjksg gks tk,xk&

(a) 1 (b) 1 / s

(c) s (d) 1/s2

176. SFG dk ewy xq.k

(a) SFG jSf[kd O;oLFkk ds mi;ksx ds fy,

(b) chth; lehdj.ksa izHkkoh lEcU/k ds dkj.k ds :i esa gksuh pkfg,

(c) uksM~l ck¡;s ls nk¡;s ,d Øe esa O;ofLFkr gksrs gSa

(d) mijksDr lHkh

177- ,d ç.kkyh xaHkhj :i ls damped gSA vc vxj bl ç.kkyh ds ykHk esa

o`f) gqbZ gS ç.kkyh ds :i esa fd;k tk,xk

(a) over damped (b) under damped

(c) oscillatory (d) critically damped

178. ,d ,drk çfrfØ;k lekjksg ij fopkj djsa

KG(s)s(s 1)

,d osx buiqV ds dkj.k ç.kkyh ds fLFkj jkT; =qfV gS

(a) 'kwU; (b) K

(c) 1 / K (d) vuar

179- ç.kkyh fo'ks"krk lehdj.k gksus ds fy, fLFkj gks tk,xk:

(a) K > 6 (b) 0 < K < 6

(c) 6 < K < 10 (d) 0 < K < 10

180- ,d fu;a=.k ç.kkyh gS

k(s 1)G(s)H(s)s(s 3)(s 4)

flLVe dj ldrs gSa dh tM+ fBdkuk okLrfod /kqjh ij fLFkr gS:

(a) s = – 1 & s = – 3 ds chp

(b) s = 0 & s = – 4 ds chp

(c) s = – 3 & s = – 4 ds chp

(d) s = – 4 dh ckbZa vksj

181- fMxzh ‘m’ dk ,d va'k cgqin vkSj fMxzh ‘n’] rks integar (n – m)ds ,d foHkktd cgqin dk vuqikr [kqyk ywi gLrkarj.k lekjksg gS rks dh

la[;k dk çfrfuf/kRo djrk gS:

(a) Breakaway points

(b) Unstable poles

(c) Separate root loci

(d) Asymptotes



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26

182. Nyquist criterion can determine the :

(a) closes loop stability with the help of plot for closedloop transfer function of the system.

(b) closed loop stability with the help of plot for open looptransfer function of the system.

(c) open loop stability with the help of open loop transferfunction of the system.

(d) open loop stability with the help of closed loop transferfunction of the system.

183. Sinusoidal oscillators are:(a) stable (b) marginally stable(c) unstable (d) conditionally stable

184. The effect adding poles and zero can be determined quicklyby :(a) Nicholas chart (b) Nyquist plot(c) Bode plot (d) Root locus

185. The gain of a system is 10 at same frequency. In terms ofdB it is equal to :(a) 0 (b) 1(c) 20 (d) 100

186. The transfer function of a compensating network is of theform

1 Ts1 Ts

If this is a phase lead by network the value of shouldbe:(a) exactly equal to 0 (b) between 0 and 1(c) exactly equal to 1 (d) greater than 1

187. When phase lag compensation is used in a system gaincrossover frequency. Band widthand un-damped frequencyare respectively :(a) increased, increased, increased(b) increased, increased, decreased(c) increased, decreased, decreased(d) decreased, decreased, decreased

188. Purely mechanical instruments cannot be used for dynamicmeasurements because they have:(a) high inertia (b) large time constant.(c) higher response time. (d) all of the above

182- Nyquist dlkSVh fu/kkZfjr dj ldrs gSa:

(a) ç.kkyh ds can ywi gLrkarj.k lekjksg ds fy, lkft'k dh enn ls ik'kfLFkjrk can dj nsrk gSA

(b) ç.kkyh dk [kqyk ywi gLrkarj.k lekjksg ds fy, lkft'k dh enn lsik'k fLFkjrk can dj fn;kA

(c) ç.kkyh dk [kqyk ywi gLrkarj.k lekjksg dh enn ls [kqyk ywi fLFkjrkA

(d) ç.kkyh ds can ywi gLrkarj.k lekjksg dh enn ls [kqyk ywi fLFkjrkA

183- Sinusoidal oscillator gSa

(a) fLFkj (b) ekewyh :i ls fLFkj

(c) vfLFkj (d) l'krZ fLFkj

184. çHkko tksM+us MaMs vkSj 'kwU; ls tYnh ls fu/kkZfjr fd;k tk ldrk gS:

(a) fudksyl pkVZ (b) Nyquist lkft'k

(c) cksMs lkft'k (d) :V fBdkuk

185- ,d ç.kkyh dk ykHk ,d gh vko`fÙk ij 10 gSA Mhch ds lanHkZ esa ;g djusds fy, cjkcj gS

(a) 0 (b) 1

(c) 20 (d) 100

186- ,d çfrdkjh usVodZ ds gLrkarj.k lekjksg QkeZ dh gS

1 Ts1 Ts

;fn ;g usVodZ ds }kjk ,d pj.k dk usr`Ro gS ds ewY; gksuk pkfg,:

(a) fcYdqy 0 ds cjkcj (b) 0 vkSj 1 ds chp

(c) okLro esa 1 ds cjkcj (d) ls vf/kd gS 1

187- tc pj.k varjky eqvkotk ,d ç.kkyh ykHk varjjk"Vªh; vko`fÙk esa ç;ksx

fd;k tkrk gSA cSaM widthand la;qä jk"Vª ds damped vko`fÙk Øe'k%

bl çdkj gS

(a) esa o`f)] o`f)] o`f) gqbZ gS

(b) esa o`f) gqbZ gS] o`f) gqbZ gS] esa deh vkbZ

(c) esa o`f) gqbZ gS] de] esa deh vkbZ gS

(d) esa deh vkbZ gS] deh vkbZ gS] esa deh vkbZ

188. fo'kq) :i ls ;kaf=d midj.kksa xfr'khy eki ds fy, bLrseky ugha fd;k tk

ldrk D;ksafd os gsS

(a) mPp tM+rk (b) cM+s le; yxkrkjA

(c) mPp çfrfØ;k le; (d) mijksä lHkh


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BSNL-TTA Mock Test Paper - 1189. The measurement value of a capacitor is 100 mF. The

true value of the capacitor is 110 mF. The percentagerelative error is(a) 9.99% (b) 9.09%(c) 10.0% (d) 4.76%

190. Maxwell’s Inductance-capacitance bridge is used formeasurement of inductance of :(a) low Q coils (b) medium Q coils(c) high Q coils (d) low and medium Q coils

191. Torque/Weight ratio of an instrument indicates(a) Selectivity (b) Accuracy(c) Fidelity (d) Sensitivity

192. Horizontally mounted moving iron instruments employ(a) Eddy current damping(b) Air friction damping(c) Fluid friction damping(d) Electromagnetic damping

193. If a dynamometer type wattmeter is connected in an accircuit, the power indicated by the wattmeter will beq(a) voltage ampere product(b) average power(c) peak power(d) instantaneous power

194. In a CRT the focusing anode is located(a) between pre-accelerating and accelerating anodes(b) after accelerating anodes(c) before pre-accelerating anode(d) none of the above

195. Optical encoder used to the measurement of speed of shaftuses:(a) Gray code (b) Binary code(c) Octal code (d) a-numeric code

196. Thermocouple transducer is used for(a) pressure measurement(b) gal-flow measurement(c) velocity and vibration measurement(d) temperature measurement

197. Insulation resistance of a cable is usually measured withthe help of(a) Digital multimeter (b) Abometer(c) Megger (d) Kelvin bridge

189. ,d la/kkfj= dh eki ewY; 100 ,e,Q gSA la/kkfj= dk lgh ewY; 110 ,e,QgSA çfr'kr ds lkis{k =qfV gS

(a) 9.99% (b) 9.09%

(c) 10.0% (d) 4.76%

190- eSDlosy ds vf/k"Bkiu&lekbZ iqy ds vf/k"Bkiu dh eki ds fy, ç;ksx fd;k

tkrk gS

(a) de Q d‚;y (b) e/;e Q d‚;y

(c) mPp Q d‚;y (d) de vkSj e/;e Q d‚;yaaaaa

191. ,d lk/ku ds Vksd / otu vuqikr dks bafxr djrk gS

(a) p;ukRedrk (b) 'kq)rk

(c) fQMsfyVh (d) laosnu'khyrk

192. {kSfrt pyrh ?kqM+lokj yksgs ds midj.kksa dks jkstxkj

(a) ,M+h orZeku fHkxksuk

(b) ok;q ?k"kZ.k fHkxksuk

(c) æo ?k"kZ.k fHkxksuk

(d) fo|qr pqEcdh; fHkxksuk

193- ,d 'kfä ukius dk ;a= çdkj okVehVj ,d ,lh lfdZV esa tqM+k gqvk gS ]

rks fctyh okVehVj }kjk n'kkZ;k tk,xk

(a) oksYVst ,Eih;j mRikn

(b) vkSlr fctyh

(c) f'k[kj fctyh

(d) rkRdkfyd fctyh

194- ,d CRT esa /;ku dsafær dj ,uksM fLFkr gS

(a) ds chp iwoZ esa rsth vkSj ,uksM esa rsth

(b) ,uksM esa rsth ds ckn

(c) ls igys iwoZ esa rsth ,uksM

(d) mijksä esa ls dksbZ Hkh

195- v‚fIVdy 'kk¶V dk mi;ksx djrk gS dh xfr dh eki ds fy, bLrseky fd;k

,udksMj

(a) xzs dksM (b) ckbujh dksM

(c) v"Vk/kkjh dksM (d) ,d&U;wesfjd dksM

196- Thermocouple VªkalMîwlj ds fy, ç;ksx fd;k tkrk gS

(a) ncko eki

(b) yM+dh&çokg eki

(c) osx vkSj daiu eki

(d) rkieku eki

197. ,d dscy ds bUlqys'ku çfrjks/k vkerkSj ij dh enn ls ekik tkrk gS]

(a) fMftVy eYVhehVj (b) Abometer

(c) esxj (d) dsfYou iqy



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28

198. ,d Wheatstone iqy esa tkuk tkrk çfrjks/k ± 0.1% ds Hkhrj djusds fy, lgh gSaA lVhdrk tks djus ds fy, ,d vKkr çfrjks/k ekik tk ldrk

gS

(a) 0.4% (b) 0.3%

(c) 0.2% (d) 0.1%

199. mPp oksYVst ij voltmeters lkFk xq.kd dk mi;ksx djus dk uqdlku dj

jgs gSa

(a) xq.kdksa dh fctyh dh [kir cM+s oksYVst ij cM+k gks tkrk gSA

(b) mPp oksYVst ij xq.kdksa ds vkns'k dSisflfVo /kkjkvksa dks jksdus ds fy,

ifjjf{kr fd;k tkuk gSA

(c) iSekb'k lfdZV fctyh lfdZV ls fo|qr ugha gSA

(d) mijksä lHkh

200. Potentiometer ds ekudhdj.k Øe esa fd;k tkrk gS rkfd og

(a) accurate

(b) precise

(c) accurate and direct reading

(d) accurate and precise

198. In a Wheatstone bridge, the known resistance are correctto within ± 0.1%. The accuracy to which an unknownresistance can be measured is(a) 0.4% (b) 0.3%(c) 0.2% (d) 0.1%

199. The disadvantage of using multiplier with voltmeters athigh voltages are :

(a) The power consumption of multipliers becomes largeat large voltages.

(b) The multipliers at high voltages have to be shielded inorder to prevent capacitive currents.

(c) The metering circuit is not electrically from the powercircuit.

(d) all of the above

200. Standardization of potentiometers is done in order that, theybecome(a) accurate

(b) precise

(c) accurate and direct reading

(d) accurate and precise


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1 c 2 a 3 d 4 b 5 b

6 d 7 d 8 b 9 b 10 a

11 d 12 b 13 a 14 c 15 b

16 c 17 a 18 b 19 b 20 c

21 a 22 c 23 a 24 a 25 b

26 d 27 b 28 b 29 a 30 b

31 a 32 b 33 d 34 a 35 c

36 b 37 c 38 d 39 b 40 c

41 b 42 c 43 c 44 a 45 b

46 d 47 c 48 d 49 a 50 c

51 d 52 d 53 a 54 d 55 a

56 a 57 b 58 d 59 b 60 b

61 a 62 d 63 c 64 d 65 b

66 c 67 a 68 a 69 c 70 c

71 c 72 c 73 c 74 c 75 a

76 d 77 c 78 d 79 b 80 b

81 b 82 b 83 d 84 d 85 c

86 c 87 b 88 d 89 c 90 c

91 d 92 c 93 d 94 c 95 b

96 a 97 c 98 d 99 b 100 d

101 a 102 d 103 a 104 a 105 b

106 b 107 b 108 d 109 a 110 b

111 a 112 b 113 b 114 c 115 d

116 a 117 d 118 d 119 b 120 a

121 d 122 b 123 d 124 c 125 c

126 b 127 c 128 c 129 b 130 b

131 b 132 c 133 b 134 d 135 a

136 c 137 c 138 a 139 a 140 a

141 d 142 d 143 b 144 b 145 d

146 b 147 b 148 a 149 a 150 b

151 c 152 b 153 c 154 b 155 c

156 d 157 b 158 d 159 d 160 b

161 d 162 d 163 a 164 d 165 a

166 c 167 b 168 c 169 d 170 a

171 a 172 a 173 c 174 d 175 a

176 d 177 b 178 c 179 a 180 c

181 d 182 b 183 b 184 c 185 c

186 d 187 d 188 d 189 b 190 b

191 d 192 b 193 b 194 a 195 a

196 d 197 c 198 b 199 d 200 c

A nswer Key



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30

21. (a)

A = 2i - 3j - 6k

B = -2i - 2j - k

Then,

ˆa .bˆb.a =

projection of A on Bprojection of B on A

=

ba.bab.a

= ab =

73

22. (c)

Given

A = i + 2j - 3k

B = 3i - j + 2k

Then, Let

X = (A B) = 4i + j - k

Y = (A B) = -2i + 3j - 5k

cos = 2 2

X.YX . Y

= 0

= 1cos 0 = 2

23. (a)

Given,

A = i + j + 4k

B = 2i + 6j + 3kSclar projection = 4

=A.BA . B

=2 2 2 2 2 2

2 6 121 4 . 2 6 3

4 = 2

2 187 17

On solving we get,

24. (a)

1 22 4 5 2 3

3 5

= 12 4(2) 5( 3) 2(5)

3

= 12 3

3

=

36

9

26. (d)

A = 1 22 1

adj.A = 1 22 1

28. (b)

Given

ex + ey = ex + y

Differentiating both side,

ex + ey dydx

= ex + y. dy1dx

At (1, 0)

dydx

= 1 2

2 1

e ee e

= -1

29. (a)

f(x) = xlog (lnx)

'f (x) = 1

ln x .1x

Solution


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BSNL-TTA Mock Test Paper - 1At, x = e

'f (x) = 1

ln e.1e

= 1e

30. (b)

x y 4

Differentiating we get, 1 1 dy 0

dx2 x 2 y

dydx

= 1 2 y

2 x

At, y = 1

x = 2(4 y) = 9

dydx

= 1 .2 1

2 9

= 13

dydx

= -3

32. (b)

2x + 2y = 2x + y

x x log 2[ 2 e ]

x log 2 ylog 2 (x y) log 2e e e

On differentiating we get,

dydx

= -1

39. (b)

22519 1i

i

= 2

1( i).(i)

= 1

40. (c)

2 21 i 1 i1 i 1 i

= 2 22 21 (1 i) (1 i)

4

= 2 21 (2i) ( 2i)4

= 2 2(i ) ( i) = -2

61. (a)

Binary number (1000001)2

1 1 0 0 0 0 1

1 0 0 0 0 0 1Gray Code:

64. (d)

00 01 11 10

0

1

ABC

1

1

1

1K - Map:

Output = A BC A BC A BC ABC

= A B C

65. (b)

Dual form of Boolean Identity

Option (a): AB AC (A B)(A C)

Option (b): (A B)(A C) AB AC

Only option (b) satisfies the duality property.

68. (a)

Given figure,

Y

A 1

1

1

2 3

Output = [(A 1) 1] A

= [[(A(0) A(1)] 1] A = [A 1] A

= [A(0) A(1)] A = A A = A A A A = 0



R

32

79. (b)

Current passing = Ampere turns

Number of turns

= 3400800

= 4

109. (a)

Power gain = 50

Gain in dB = 10log (power gain)

= 10log50 = 16.98 = 17dB

179. (a)

Given, s4 + 4s2 + s + 6 + k = 0

180 (c)

Given, G(s) = k(s 1)

s(s 3)(s 4)

Root locus lies on real axis,

s(s + 3)(s + 4) = 0

s = 0 or -3 or -4

lies between s = -3 and s = -4

189. (b)

True value = 110mF

Measured value = 100mF

% Relative error,

= True value measured value 100%

True value

= 110 100 100%

110

= 10 100

110 = 9.09%

198. (b)

In a wheatstone bridge, there are 4 resistance, amongthem 3 are known. Let known resistance be R1, R2, R3

do not open this test booklet until you are asked to...

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