electronics engineering coaching materials section 1

7/25/2019 Electronics Engineering Coaching Materials SECTION 1

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ANS. ICON

11. #he memory area for programs with highest priority.

ANS. $ORE"ROUND

12. rewritten standard le$handling programs are called _____.

ANS. UTILITIES

1. #he signal that the computer is awaiting a command from the user!

ANS. PROMPT

1". N3S refers to!

ANS. OPERATIN" S#STEM $OR A NET%ORK

1%. DA stands for!

ANS. PERSONAL DATA ASSISTANT

1'. An imaging techni)ue used to measure the magnetic elds produced byelectrical acti,ity in the brain.

ANS. MA"NETOENCEPALO"RAP

1(. hat sensor is used in magnetoencephalograph/

ANS. SUPERCONDUCTIN" &UANTUM INTER$ERENCE

1+. &ain program in the operating system.

ANS. KERNEL

1-. hich of the following splices is N3# butted/

ANS. KNOTTED TAP 'OINT

20. hat nonmetallic material is most commonly used to protect wires andcables/

ANS. $IBROUS BRAID


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21. hen a wire is insulated with glass braid or asbestos and re)uiresstripping4 which of the following tools should not be used/

ANS. OT(BLADE %IRE STRIPPER

22. hen you solder electrical connector splices4 and terminal lugs4 whattype of solder should you use/

ANS. )*+,* SOLDER

2. hen noninsulated splices and terminal lugs are insulated4 what type5sinsulation are most commonly used/

ANS. RUBBER TAPE AND EAT SRINKABLE TUBIN"

2". hen a estern 6nion splice is used to connect two wires4 why should

the twisted ends of the wires be pressed down as close as possible to thestraight portion of the wire/

ANS. TO PRE!ENT TE %IRES $ROM PUNCTURIN" TE TAPECO!ERIN"

2%. hat types of insulation are best suited for use in a high$temperatureen,ironment/

ANS. $EP- E.TRUDED POL#TETRA$LUOROET#LENE AND SILICONERUBBER

2'. hat should be done with the remo,able tip of a soldering gun after itbecomes pitted/

ANS. $ILE TE TIP SMOOT AND RETIN IT

2(. 7or a gyro to be uni,ersally mounted4 it &6S# ha,e a total of how manygimbals4 if any/

ANS. T%O

2+. A position ser,o system e*hibits a series of o,er tra,els. #his condition isknown by which of the following terms/

ANS. UNTIN"

2-. 7or a ser,o system to operate smoothly and e8ciently4 it must ha,ebalance between which of the following factors/


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ANS. AMPLI$ICATION AND DAMPIN"

0. #he operating of an accelerometer is based on what physical property/

ANS. INERTIA

1. Amount of precession of a 9 is proportional to what input factor/

ANS. RATE O$ "#RO CASE ROTATION

2. hat does the arrow on a synchro schematic symbol indicate/

ANS. TE AN"ULAR POSITION O$ TE ROTOR

. :n a properly operating ser,o system4 what is the phase relationshipbetween the reference ,oltages to the error detector and the demodulator/

ANS. IN PASE ONL#

". Synchro capacitors are used to pro,ide which of the followingcharacteristics in a synchro system/

ANS. IMPRO!ED ACCURAC#

%. &ultispeed synchro systems ha,e what of the following ad,antages o,er

single speed synchro systems/

ANS. "REATER ACCURAC#

'. During synchro alignment4 what is the purpose of the coarse setting/

ANS. TO ENSURE A SETTIN" O$ /ERO DE"REES RATER TAN I0*DE"REES

(. #he ,oltage used to pre,ent false synchroni;ation is known by whatterm/

ANS. STICKO$$ !OLTA"E

+. :f you nd that a synchro has bad bearings4 which of the following actionsshould you take/

ANS. REPLACE TE S#NCRO


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-. :n what ma*imum number of directions is a rate gyro free to process/

ANS. T%O

"0. ulse$counting accelerometers are designed for use only with what type

of e)uipment/

ANS. DI"ITAL COMPUTERS

"1.


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ANS. MO!EMENT O$ TE SOLDERED PARTS DURIN" TE COOLIN"PROCESS

"-. hen a wire is soldered to a connector4 why should the wire be strippedappro*imately 1>2 inch longer than the depth of the solder barrel/

ANS. TO PRE!ENT BURNIN" TE %IRE INSULATION

%0. hy should a small wattage soldering iron N3# be used to solder largeconductors/

ANS. TE IRON MAINTAIN A SATIS$ACTOR# SOLDERIN"TEMPERATURE %ILE "I!IN" UP EAT TO TE CONDUCTOR

%1. hen electrical and electronic components are soldered4 what type of?u* must be used/

ANS. ROSIN

%2. hat is the most e8cient soldering temperature/

ANS. *2$

%. #he current gain in a common$collector circuit is called _____.

ANS. "AMMA

%". A method for checking transistor is cumbersome when more than onetransistor is bad in a circuit/

ANS. SUBSTITUTION METOD

%%. A breakdown theory that e*plains the action that take place in a hea,ily

doped N$=unction with a re,erse bias of less than % ,olts.

ANS. /ENER E$$ECT

%'. #he arrow in a &3S7@# indicates a _____.

ANS. SUBSTRATE


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%(. hat pro,ides a timing signaling in a digital e)uipment/

ANS. CLOCK

%+. A faulty transistor would be identied as what le,el of packaging/

ANS. LE!EL *

%-. hat is the preferred tool to use to strip of aluminum wire/

ANS. KNI$E

'0. #he ability of a gyro to maintain a position in space is referred to by whatterm/

ANS. PRECESSION

'1. A de,ice that allows the depositing of material in selected areas of asemiconductor substrate4 but not in others is known as a_________.

ANS. %A$ER MASK

'2. Letters and number stamped on body of an : ser,e to pro,ide which ofthe following types of information/

ANS. USE

'. @lectrostatic charges may de,elop as high as which of the following,oltages/

ANS. 3-*** !OLTS

'". Damage to some electronic components can occur at what minimumelectrostatic potential/

ANS. 3 !OLTS

'%. #he most comple* to produce and di8cult to repair printed circuit boards

are those made using which of the following methods/

ANS. LA#ER(BUILD UP

''. hat is the minimum number of synchro de,ices needed for a simplesynchro transmission system/

ANS. T%O


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'(. #he ,alue of ,oltage or current at one particular instant of time.

ANS. INSTANTANEOUS

'+. hat type of lter is used to block the passage of current for a narrow

band of fre)uency while allowing current to ?ow at all fre)uencies abo,e orbelow this band/

ANS. BAND RE'ECT $ILTER

'-. :f you are looking for both good ,oltage gain and high input resistance4you must use a _____.

ANS. COMMON(SOURCE AMPLI$IER

(0. hat term is used to describe electronic systems that are made up of

e*tremely small parts or elements/

ANS. MICROELECTRONICS

(1. N =unctions are protected from contamination during the fabricationprocess by which of the following materials/

ANS. O.IDE

(2. #o deposit highly 9 substrate4 which of the following methods is used/

ANS. !ACUUM E!APORATION

(. :n : production4 gold or aluminum bonding wires are used for which ofthe following purposes/

ANS. TO CONNECT TE CIP TO TE PACKA"E LEADS

(". An assembly of microcircuits or a combination of microcircuits anddiscrete components is referred to as a __________.

ANS. MICROCIRCUIT MODULE

(%. #est e)uipment that continuously monitors performance andautomatically isolates faults to remo,able assemblies is what category ofe)uipment/

ANS. ON(LINE


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('. hich of the following alloys will melt directly to li)uid and ha,e noplastic or semili)uid state/

ANS. EUTECTIC ALLO#

((. A conformal coating is considered thin if it is less than what thickness/

ANS. *4*5 INC

(+. hat ma*imum number of logic gates should be e*pected in a large$scale integration circuit/

ANS. 5-***

(-. rotecti,e materials applied to electronic assemblies to pre,ent damagecaused by corrosion4 moisture4 and stress are called ________.

ANS. CON$ORMAL COATIN"S

+0. utting and peeling is an easy method of remo,ing which of the followingtypes of coatings/

ANS. SILICONE

+1. hat are the appro,ed methods of conformal coating remo,al/

ANS. MECANICAL- TERMAL 6 CEMICAL

+2. #urret4 fork4 and hook terminals are e*amples of what type oftermination/

ANS. ABO!E(TE(BOARD

+. hat total number of degrees of bend are BaC fully clinched leads and BbCsemi$clinched leads/

ANS. 7A8 9* 7B8 ,

+". Stirring the lead during desoldering pre,ents which of the followingunwanted results/

ANS. S%EAT 'OINTS


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+%. &ost damage to printed circuit boards occur at which of the followingtimes/

ANS. DURIN" COMPONENT REMO!AL

+'. hen remo,ing solder with a solder wick4 where should the wick beplaced in relation to the solder =oint and the iron/

ANS. BET%EEN TE 'OINT AND TE IRON

+(. isual inspection of a completed repair is conducted to e,aluate which ofthe following aspects of the repair/

ANS. %ORKMANSIP &UALIT#

++. lug$in D:s are susceptible to loosening because of which of the

following causes/

ANS. !IBRATION

+-. 7or the remo,al of imbedded #3s in which of the following are free4 whichof the following methods is recommended/

ANS. PUS OUT "ENTL#

-0. hen a #3 or a D: is replaced on a printed circuit board4 what type oftermination is normally used/

ANS. TROU"(TE(BOARD

-1. Eeating the leads and lifting them up with twee;ers is the preferredmethod of remo,ing which of the following components/

ANS. $LAT PACKS

-2. hat is the rst step in the repair of burned or scorched boards/

ANS. REMO!IN" ALL DISCOLORED MATERIAL

-. #he force between a magnet and a piece of ferromagnetic metal that hasnot been magneti;ed!

ANS. IS NE!ER REPULSI!E

-". hat signicant ad,antage4 in some applications4 of a toroidal coil o,er asolenoid is!


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ANS. TE MA"NETIC $LU. IN A TOROID IS PRACTICALL# ALL %ITINTE CORE

-%. hat is the unit of current/

ANS. AMPERE

-'. hat is the unit of resistance/

ANS. OM

-(. hat is the unit of charge/

ANS. COULOMB

-+. hat is the lightest element/

ANS. #DRO"EN

--. hat is the ma*imum output ,oltage rate of change of an op$amp/

ANS. SLE% RATE

100. A con,erter that changes ac$,oltage to another ac$,oltage le,el.

ANS. AC(CON!ERTER

101. hich one is N3# a factor aFecting resistance/

ANS. MASS

102. 3utput of 1 if all inputs are 0.

ANS. NOR "ATE

10. 3utput of 0 if all inputs are 0.

ANS. OR "ATE

10". 3utput of 1 if all inputs are 1.

ANS. AND "ATE

10%. An adder which can add up two binary digits but will not produce acarry.


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ANS. &UARTER ADDER

10'.


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11'. #he most popular op$amp packages are metal can4 +$pin D:4 and theS. hich of these corresponds to #3$--/

ANS. METAL CAN

11(. #he minimum amount of current needed for an SG to conductcontinuously.

ANS. OLDIN" CURRENT

11+. #he ,oltage across the anode BAC and cathode BHC terminals of an SGwhen conducting.

ANS. OLDIN" !OLTA"E

11-. onning each program to certain dened limits in memory is called

_____.

ANS. MEMOR# PROTECTION

120. #ransient suppression minimi;es the chance of _____.

ANS. DIODE $AILURE

121. :n 3#A4 transconductance is control by _____.

ANS. BIAS CURRENT

122. hat inductor is used at fre)uency -% &E;/

ANS. AIR CORE

12. Gegulator that dissipates less power and less heat.

ANS. S%ITCIN" RE"ULATOR

12". 9 oscilloscope

ANS. TRI""ER OLD O$$

12%. Set of programs that are between applications software and hardware.

ANS. OPERATIN" PRO"RAM


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12'. :nstrumentation ampliers are used in _____.

ANS. I"NOISE EN!IRONMENT

12(. hat type of indicating instrument is installed in the stator circuit of

synchro system/

ANS. AN O!ERLOAD INDICATOR

12+. ______ is the process making a material Ipassi,eJ in relation to anothermaterial prior to using the materials together.

ANS. PASSI!ATION

12-. 9 higher fre)uency 9

ANS. RADIO $RE&UENC# BRID"E

10. :t sometimes known as &a*well$ein bridge. 9

ANS. MA.%ELL BRID"E

11. Self$inductance 9 capacitance and resistance9

ANS. O%EN BRID"E

12. A graph of thermodynamic properties of moist air at a constant

pressure4 such as wet$bulb temperature and dry$bulb temperature.

ANS. PS#CROMETRIC CART

1. #he liberation or absorption 9 when an electric current ?ows from awarmer to a cooler part of a conductor is called _____.

ANS. TOMSON E$$ECT

1". hich of the following terms describes the rst remainder whencon,erted to decimal numbers to other bases/

ANS. LSD

1%. hat causes the process called =unction recombination to occur when Nand materials are =oined together/


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ANS. TE DI$$USION O$ ELECTRONS AND OLES MO!IN" ACROSSTE 'UCTION INTO TE T%O MATERIALS

1'. hich of the following will apply to a mo,ing coil instrument/

ANS. E!EN SCALE MEASURIN" DC

1(. hich of the following will apply to a mo,ing coil rectier instrument/

ANS. E!EN SCALE MEASURIN" AC

1+. hich of the following will apply to a mo,ing iron instrument/

ANS. UNE!EN SCALE MEASURIN" AC AND DC

1-. A method of cur,e tting using linear polynomials hea,ily employed in

mathematics particularly numerical analysis and numerous applicationsincluding computer graphics.

ANS. LINEAR INTERPOLATION

1"0. #he ,oltage across the anode and cathode terminals of the SG whenconducting.

ANS. OLDIN" !OLTA"E

1"1. hat are e*amples of acceptor impurities/

ANS TRI!ALENT IMPURITIES

1"2. hat are e*amples of tri,alent impurities/

ANS. BORON - "ALLIUM- INDIUM

1". #he ma*imum output ,oltage swing of an op$amp/

ANS. ;!SAT TO !SAT

1"". #he current needed at the input of an 3Amp to operate it normally.

ANS. INPUT BIAS CURRENT

1"%. #he most e*tensi,ely used semiconductor.

ANS. SILICON


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1"'. hat current ?ow in a semiconductor is due to the applied electric eld/

ANS. DRI$T CURRENT

1"(. #he purpose of installing thyrectors.

ANS. TO PROTECT TE CIRCUITS $ROM I" !OLTA"E SUR"ES

1"+. onning each program to certain dened limits in memory is called______.

ANS. MEMOR# PROTECTION

1"-. #ransient suppression minimi;es the chance of _____.

ANS. DIODE $AILURE

1%0. :n 3#A transconductance is controlled by_____.

ANS. BIAS CURRENT

1%1. hat inductor is used at fre)uencies of -% &EK.

ANS. AIR CORE

1%2. Gegulator that dissipates less power and less heat.

ANS. S%ITCIN" RE"ULATOR

1%. eriod of time which the oscilloscope cannot trigger.

ANS. TRI""ER OLD O$$

1%". A good form of inductor at 7&

ANS. AIR CORE

1%%. Set of programs that lies between application software and the

computer hardware.

ANS. OPERATIN" PRO"RAM

1%'. :nstrumentation ampliers are used in_____.

ANS. I" NOISE EN!IRONMENT


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1%(. hat type of indicating de,ice is usually installed in the stator circuit ofa tor)ue synchro system.

ANS. AN O!ERLOAD INDICATOR

1%+. ____ is the process of making a material Ipassi,eJ in relation to anothermaterial prior to using the material together.

ANS. PASSI!ATION

1%-. :n the conte*t of corrosion4 _____ is the spontaneous formation of a hardnon reacti,e surface lm that inhibits further corrosion. #his layer is usuallyan o*ide or nitride that is a few molecules thick.

ANS. PASSI!ATION

1'0. #wo conductors with insulator between them is called_____.

ANS. CONDENSER 7OLD NAME8+ CAPACITOR 7NE% NAME8

1'1. hemical reactions that release energy are called e*othermic reactions____ is an e*ample of e*othermic reaction.

ANS. $REE/IN"

1'2. #his bridge is often used in laboratories to measure both capacitancesand inducti,e circuits at higher fre)uencies.

ANS. RADIO $RE&UENC# BRID"E

1'. :s sometimes called &a*well M wien bridge and is used to measure anunknown inductance with a standard capacitance.

ANS. MA.%ELL BRID"E

1'". A four arm alternating current bridge used to measure self inductance in

terms of capacitance and resistance bridge balance is independent offre)uency.

ANS. O%EN BRID"E

1'%. A graph of the thermodynamic properties of moist air at a constantpressure4 such as wet bulb temperature and dry bulb temperature.


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ANS. PS#CROMETRIC CART

1''. #he liberation or absorption of heat when an electric current ?ows froma warmer to a cooler part of a conductor is called ______.

ANS. TOMSON E$$ECT

1'(. A certain condition wherein a nucleon can be stimulated to emit a ,erysharply dened beams of gamma rays.

ANS. MOSSBAUER E$$ECT

1'+. hich of the following type of test e)uipment is classied as oF$lineautomatic test e)uipment.

ANS. !ERSATILE A!IONIC SOP TEST 7!AST8

1'-. hich of the following terms describing the rst remainder whencon,erting decimal number to other bases.

ANS. LSD

1(0. Eow do you connect a ,oltmeter in a circuit/

ANS. IN PARALLEL

1(1. Eow do you increase the range of a ,oltmeter/

ANS. INSERT A I" RESISTANCE IN SERIES %IT TE METER

1(2. As a rule of thumb4 power rectier can operate satisfactorily with frontto back ratio or the back to front ratio of.

ANS. 1* TO 1

1(. As a rule of thumb4 signal diode can operate satisfactorily with front toback ratio or the back to front ratio of.

ANS. 3** TO 1

1(". hat maintains a more constant speed under ,arying load conditionsthan a series motor.

ANS. SUNT MOTOR


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1(%. A lter which allows a narrow band of fre)uencies to pass through thecircuit and re=ects or attenuates fre)uencies which are either higher or lowerthan the desired fre)uency.

ANS. BANDPASS $ILTER

1('. A circuit that is used to block the passage of current for a narrow bandof fre)uencies4 while allowing current to ?ow at all fre)uencies abo,e orbelow the this band. #his type of lter is also known as a band suppression orband re=ect.

ANS. BANDSTOP $ILTER

1((. hat theorem is used in sol,ing electrical circuits with se,eral ,oltagesources/

ANS. SUPERPOSITION

1(+. hat is the process of determining the magnitude of something interms of a recogni;ed standard/

ANS. MEASUREMENT

1(-. A ,ariable positi,e regulator.

ANS. 31

electronics engineering coaching materials section 1

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