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Professional Training and Consultation

API 653PREPARATORY COURSE

Daily Exams

26'h upto 31st August 2006AI-Khobar, Saudi Arabia

MR. HASAN ATIYAH HASAN ALGHAMDISABle

Saudi Arabia

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Profes sional Training and Co nsultationAPI 65 3 Prepar atory

26'" upt o 31 11 Augu st 2006, AI- Khobar, KSA.Page 1 of 13

FINAL EXAM (CLOSED)

Instructions:Choose only one answer, which you think is most appropriate.Use the attached answer sheet in answering the following questions.

1. The complete or partial removal and replacement of more than12 inches of a vertical weld joining shell plates is considered a:

(a) minor alteration ;

(c) major alteration;

(b) minor repair;

(d) major repair.

2. A single film technique was used to make a radiograph using aCobalt-50 source. The minimum permitted density in the area ofinterest is :

f:f~:

a.b.c.d.

4 .01.82.01.3

3. Cathodic protection is ach ieved by directing the flow of currentfrom:

(

a.b.c.d.

A cathode to anodeAn anode to cathodeBoth installations are acceptableNeither of a and b

GS}

4. is a change from previous operating conditionsinvol v ing different properties of the stored product such asspecific gravity or corrosiv ity and / or different service conditionsof temperature and / or pressure:

(a ) Re- rating; (b) Change in service;(c) Repair ; (d) Reconstruction

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API 653 Preparatory

26"' upto 3 1" Augu st 200 6, AI- Khob ar , KSA.Page 2 of 13

FINAL EXA M (CLOSED)

5. Describe how a liquid penetrant examination should beperformed in order to detect discontinuities which are open tothe surface.

a. Clean the part, apply the developer, apply the penetrant,remove excess penetrant, inspect the part, clean the part

b. Clean t he part, apply penetrant, remove excess penetrant,apply the developer, inspect the part, clean the part

c. Clean the part, apply the developer, apply the penetrant,inspect the part, remove excess penetrant, clean the part

d. Clean the part, apply the developer, apply the penetrant,inspect the part, clea n the part

6. A rad iographic t echnique in wh ich radiation passed through twowalls and both t he walls are viewed on the same radiograph(double wall , double image - ellipse) the limitation for the outsidediameter is :

a . 3-1/2"b. 2"c. 4"d. Any diameter poss ible

7 . - I nformation needed when determining the hat e of corrosion:

a. Original th ickness or last inspection thicknessb. Current thicknessc. Length of t ime in serviced. All the above

8. The ma ximum acceptable undercutting for base metal inreconst ructed tank for horizonta l welds is:

(a) 1/64"; (b ) 1/ 32"; (c) 1/16"; (d) 1/8"

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API 65 3 Preparatory

26 th uotc 3 1"l August 2006, At- k hc bar, !<SA.Page 3 of 13

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FINAL EXAM (CLOSED)

9. Tank was inspected in 1985 and the thickness was observed tobe 0.32 inch. The thickness observed during inspection in 1995was 0.30 inch. What is corrosion rate?

a. 2 mpyb. 20 mpyc. 0.2 mpyd. 1 mpy

10 . If remaining corrosion allowance (RCA) at present is 0.05 inch,the next thickness inspecti on due for above tank sha ll not belater than:

'0i;

a.b.c.d.

10 years15 years6 years12.5 years

11. A corroded area of a tank bottom plate is repaired by weldingoverlay. There is no change in the rating and no change is madeon the nameplate. Which of the following is the correct term todescribe t his process?

(

a.b.c.d.

ReconstructionRepairAlterationNone of the above

12 . The ma ximum interval bet ween internal inspections shall notexceed __ yea rs when corros ion rate is known:

(a) 10; (b) 20; (c) 5 ; (d) 15.

13 . Hot taps are not permitted under which of the followingconditions?

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FINAL EXAM (CLOSED)

a. On plates requ iring PWHT.b. On ultrasonically sound platec. On tanks with dia. more than 80 feet.d. None of the above.

14. A tank of 160 ft diameter is to be checked for shell settlement.Minimum number of equally spaced settlement points to bechecked will be:

a . 16b. 20c. 24d. 12

15. For a tank made by reconstruction, under what circumstancesmaya new shell-to-bottom weld be exempt from hydrostatictesting?

(

a.

b.

c.

d.

When the root pass has been visually inspected andthe final weld is fully examined, visually andrad iographically.Reconstructed tank is never exempted fromhydrostatic testing. ,When the root pass has been visually inspected andthe final weld is fully examined, visually and byvacuum box.When the welding method has been reviewed andapproved by an engineer experienced in tank designin accordance with API Standard 650.

L!W~.%f1.;'-,:,...

16 . In atmospheric conditions, bottom coatings may be applied if thesteel temperature is:

a. 2°F above t he dew pointb. 5°F below the dew point.c. 10°F above the dew point.

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API 65 3 Prep ara tory

26th uptn 3 11t Aug us t 2006, AI- Khobar, KSA.

Page 5 of 13

FINAL EXAM (CLOSED)

d. At the dew point.

17. Procedure qualiflcation for welding during repair of tanks is donein accordance with:

a. AWS 01.1b. API 1104c. ASME Sect ion IXd. All of the above

18. Widely scattered pits may be ignored under the followingcondit ions

~"

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a.b.

c.

d.

Where the service fluid is corrosive or hard to hold.If sum of pit lengths along any 8" vertical line does notexceed 2"When no pit has dept h which resu lts in the minimumthickness being less than one-half the minimum acceptablethickness of the shell plate exclusive of corrosion allowanceband c

19. For ve rification of radiographic sensitivity and imagequali ty, wh ich of the fol lowing are used:

( a.b.c.d.

CassettesPenetrametersCamerasColl imators

£?:~~~!"

20. Internal corrosion in the vapour space above liquid level occursdue to:

a. Hydrogen Sulphide vapourb. Water vapourc. Oxygend. Any combination of the above three

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Page 6 of 13

FINAL EXAM (CLOSED)

21. API 650: Appendix M provides requirements for Tanks designedto operate at the following range of temperatures:

a. Exceeding 260°Cb. Above 90° - 260°Cc. Below 90°Cd. Below OOC

22. For a reconstructed tank as per API 653 Verticality (out-ofplumbness) of top of the shell shall not exceed ,

a. 1/300 of total tank heightb. 1/250 of total tank heightc. 1/400 of total tank heightd. None of the above

23. When lin ing is applied to bottom on inside of tank, the liningshall extend up the shell.

a. 6" minb. 12" minc. 18" mind. 3" min

24. Hot tap can be performed on:

a. Vapour space in the shellb. On the roofc. In the shell below liquid leveld. Anywhere on the tank

25. A radiograph was having density near the penetrameter equal to3.0. Hence the acceptable density range of the radiograph is:

a. 1.7to4b. 2.55 to 3.9c. 2.0 to 4.0

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26 lh upto 3 1" August 2006. AI- Khobar. KSA.

Page 7 of 13

FINAL EXAM (CLOSED)

d. None of the above

26. The examiner for conduct ing magnetic particle testing on thetank welds shall be :

a. Qualified as per ASNT Leve l II or IIIb. Able to read Jagger-2c. Qualified as per ASME Sec. Vd. None of the above

27. I n atmospheric cond itions, grit blasting can be done attemperatu re of at least:

~~~:.

a.b.c.d.

2°F above the dew point.5°F below the dew point5°F above the dew pointAt the dew point

28. How many equal ly spaced measurements are required for thethickness averaging technique?(a)2 (b)S (c) 4 (d)3

How many spe cimens must be used for impact tests f rom asingle t est coupon or t est location?

(

29 .

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

30. Hydrostatic tests sha ll be held forreconstruct ed tank .

hours for the

(a) 2 (b) 8 (c) 24 (d) 72

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31. In a rad iographic film of a weld, how is back scatterchecked?

(a) By use of a penetrameter(b) By f ilm density

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261h upt c 31"1 August 2006. AI-Kho bar, K$A.Page 8 of 13

FINAL EXAM (CLOSED)

(c) Using lead letter "6"(d) All of the above

32. In general, if shell thickness does not exceed __ inch, it doesnot require further assessment for brittle fracture:

(a) 0.25 (b) 0.75 (c) 1.00 (d) 0.50

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33 . Potential for brittle fracture exists for tanks constructedaccording to:

(a) API 650 - 7th edition

(b) API 650 - latest edition

(c) API 650 - 4th edition

(d) None of the above

34 . Three types of external inspections are :

(a) Scheduled, routine and llquld penetrant

(b) Scheduled, routine and UT thickness

(c) Scheduled out of service, routine and UT thickness

(d) Unsched uled , routine and liquid penetrant

35 . Welders qualifications shall expire as they do not weld:

(a) Within a given process for a 6 month period

(b) Using a given procedure for a 6 month period;

(c) On a tank for 6 months;

(d) For a 3 month period.

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API 65 3 Prepar atory26 111 upto 3 111Aug ust 2006. Al- Khob ar, KSA.

Page90r 13

FINAL EXAM (CLOSED)

36. What are penetrameters used for:

(a) A penetrameter is used for radiographic technique inthat it serves as an image quality indicator

(b) It indicates the magnetic properties of the materials

(c) To check penetrant quality in PT inspection

(d) To check weld penetration during welding

37 . Unless otherwise agreed to by the purchaser, what is theminimum nominal width of a shell plate?

.:,:-~~~&'

(a) 36 inches

(c) 72 inches

(b) 48 inches

(d) 96 inches

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38. "Each vertical weld must be rad iographed (either spot or fullradiography) for the bottom shell course (i.e ., course no. 1) forall tanks constructed to current API 650 Basic Standard." Thisstatement is:

a. False

b. True

c. Whether any radiog raphy is requ ired or not dependson shell thickness.

d. Depends on tank design Engineer's opinion

39. Accord ing to ASME Sec. IX, welding filler metals are grouped intogroupings (based on their usability ) as :

(a) P-numbers (b) F-numbers

(c) Z-numbers (d) ASTM spec.

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261h upt u 3 111 August 2006. Al- Khobar. KSA.

Page 10 of 13

FINAL EXAM (CLOSED)

40. When reviewing a rad iograph, a light image of the letter B canbe seen on the fil m with dark background .

(a) This is cause for rejection

(b) This is not cause for rejection

(c) Th is is the same as a light letter B

(d) An unusual safety hazard existed during theexposure

41. Which of the following penetrant system is generally consideredleast sensitive?

"~~:~9'.:-· ·<'~U.:' ~-$

a.

b.

c.

d.

Water-washable - v isible dye

Solvent removable - visible dye

Water-washable - fluorescent dye

Post-emulsification - visible dye

42. The nondestructive exam ination method to be used for aparticular inspection should be determined by the:

a. Availability of certified NDE examiners

~ b. Length of time since the last inspect ion

c. Age of th e component to be inspected

d. Type, location, and orientation of t he expected flaws

43 . Out of the following four options in LPT, most sensitive resultscan be obtained by :

a. Visible penet rant - water washable

b. Flu roscent penetrant - post emulsifying type

c. Visible - solvent removable type

d. Visib le - post emulsify ing type:; : :;'~ t,

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FINAL EXAM (CLOSED)

44 . A PQR was qualified in 5G position using a new welder. Butproduct ion weld ing is to be done in 2G position . Which of thefollowing are app licable as a minimum?

a. Both procedure and welder shall be re-qualified in 2Gposition .

b. The qualified procedure can be used ,only welder needs tobe re-qualified

c. The we lder is qualified, but the procedure needs requa lification

d. Both procedure and welder need not be re-qualified .

45. Minimum thickness evaluation may be conducted by ?

g~~";:'"~~~

a.b.c.b.

Use of an external micrometer on lyUltrasonic testingD.P. CheckNone of above

46. For procedure qualification documentation:

(

a.

b.c.

d.

WPS gives the procedure test data and results ofte nsile/bend testPQR gives ranges qualified by procedure t est .PQR gives procedure test data and WPS gives rangesqualifiedWPS and PQR both give test data and ranges qualified

47. Identify corre ct statement from following:

a. Tensile test for procedure qua lification is passed only if base

metal failu re occurs at or above Specified Minimum Tensile

Strength (SMTS) of base metal

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26 '" up to 3 111 Aug ust 2006. Al- Khobar. !<SA.Page 12 of 13

FI NAL EXAM (CLOSED)

b. Tensile test for procedure qualification is passed only if base

metal failure occurs above SMTS of base metal

c. Tensile test for procedure qualification is passed even if weld

metal failure occurs above 95% of SMTS of base metal

d. None of the above

48. When using radiographs to qualify we lder, the acceptancestandards used are found in:

~~1;

..:~.""

a.b.c.d.

ASME Section VASME Section IXASME Section VIIIThe referencing code

~

49. An RBI assessment can be used to alter the internal inspect ionstrategy provided:

a) RBI is performed considering likelihood of failure andconsequence of failure.

b) The RBI is fully documented.c) A third party conducts the RBI.d) Both " a" and " b" above

50. You are reviewing a WPQ for a welder. The test results indicatethe fol lowing:

a. Satisfactory side bendb. Face bend satisfactoryc. Visual satisfactory

Will th ese tests qualify the welder?

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FINAL EXAM (CLOSED)

a. Yesb. No, because bend tests are not correct type.c. Not enough information givend. No, because radiography is essential for welder

qualification

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Page 1 of 1

FINAL EXAM (CLOSED)Answer Key

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Answer': .< . ,~!'~ '~"'~',:,,~;'1~"~

Q. Answer Reference Q. Reference, :1, .;,-' ,., ....-1 D API 653, 12.3.1.2 (b) 26 B API 650 6.2.32 C ASME V T-282.1 27 C API 652, 7.43 B API 65 1, 4 .4.1 28 B API 653 4 .3 .2.1 (e)

4 B API 653 , 3.7 29 C API 650, 2.2.8.3 -5 B ASME V T-600 30 C API 653 12.3.1.16 A ASME V, Tc271.2 (b) 31 C ASME V, T-284 "";1' ;' ; .,~

7 D API 575 7.6 32 D API 653 Flo. 5-28 B API 653 10.4.2 .5 33 C API 653, 5.3.2 . ~ ~.'

9 A API 653 3.8 34 B API 653 6.310 D API 653 6.3 .3.2 (b) 35 A ASME IX, QW 322:1 (a)11 B API 653, 3.15 36 A ASMEV12 B API 653, 6.4.2.1 37 C ., API 650 . 3.6.1213 A API 653 9. 14 .1.1 38 B API 650 6 .114 A API 653, 12.5.1.2 39 B ASME IX OW,,~ 431i...•15 B API 653, 12.3 .1.1 (a) 40 A ASME V, T-28416 C API 652, -8 .3 41 A ASMEV, Art. 6'i1 ':"-' ..17 C API 653 11.1.1 42 D General Knowledae18 D API 653, 4. 3 .2 .2 43 B ASME V, Gen. Knowledge

19 B ASMEV Art. 2 44 B ASME IX, Table QW-461.9

20 D API 575 5.2.2 4 5 B General Know ledge21 B API 650, 1.1.17 4 6 C ASME IX, OW - 200 .222 D API 653 10.5 .2 .1 47 D ASME IX OW := 153cr, .23 C API 652 6.4 48 B ASME IX, OW - 191.224 C API653 9.14.1.2 49 D . APL653 6'~43 '~:: ~ ....25 C ASME V Art. 2 50 B ASME IX, QW - 452

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Page 1 of 8

FINAL EXAM (OPEN)Instructions:Choose only one answer, which you th ink is most appropriate.Use the attached answer sheet in answering the following questions.

1. Exclusive of corrosion allowance, what is the minimum nominalthickness for all new construction bottom plates?

a. 1/2 inchb. 1/4 inchc. 3/16 inchd. 5/8 inch

2. For shell horizontal joints, how many additional radiographs shallbe taken for each 50 feet of horizontal joint, (not including thoserequ ired as per API 650) for welds made in existing plates duringthe repa ir?

a. 1b. 2c. 3d. 4

3. The recommended minimum development time (penetranttesting) allowed for a material made of high temperature alloyis:

a. 5 minb. 10 minc. 7 mind. 60 min

4. Select suitable hole type (source side) penetrameter forfollowing weld joint:

Weld reinf. =118" thk

7/8"thk

Backing strip = 3116" thk

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Page 2 of 8

FINAL EXAM (OPEN)

a) No. 20b) No. 25c) No. 30d) None of the above

5. If type of penetrameter is Q.1 is changed to wire type whatshall be the wire designation (wire decimeter in inch)

a. 0.025 (No. 10)b. 0.016 (No.8)c. 0.032 (No. 11)d. None of the above

6. For steel plates and weld to be checked LPI, what shall be thepenetration t ime for penetrant

a. 10 min for weld, 5 min for plateb. 5 min for bothc. 10 min for bothd. 5 min for weld, 10 min fo r plate

7. After applying the dry developer the examiner checked fou rwelds for surface defects after following period, weld A- after 5minute, weld B after 10 minute, weld C was checked after 30minutes and weld Dafter 65 minutes which of the weld werechecked wrongly

a. Weld A and Bb. Weld C and Dc. Weld D onlyd. Weld A and D

8. Following combination of base metal and welding electrode wasqualified by a certa in PQR... impact testing is not required.

Base Metal =SA 285 GrC Plates, 314" th kWelding electrode = AWS E 6015

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FINAL EXAM (OPEN)

This PQR will qualify which of the following combination of basemetal- weld ing electrodes.

a. 1" thk SA 515Gr 60 plates, E 6013 electrodesb. 1 3f4 " rhk SA 285 GrC plates, E 6013 electrodesc. 1 Y4 thk plates SA 516Gr70, E 7018 electrodesd. None of the above

9. For MT examinat ion by prod techniques the spacing betweenprods shall be between

a. 4 inch to 12 inchb. 4 inch to 10 inchc. 3 inch to 10 inchd. 3 inch to 8 inch

10. For a tank with 130 ft diameter thickness of top course workedout was td=5mm tt=4mm. What will be minimum nominalt hickness provided for this course according to API 650 for anew tan k?

a. 3/16" (5mm)b. 1/4" (6mm)c. 5/16" (8m m)d. None of the above

11. For a tan k with diameter 100ft was found to have thicknessreduction in a localized area. Minimum thickness observed (t2)was 1 inch. What will be the critical vertical length of for thearea?

a. 40 inchesb. 37 inchesc. 45 inchesd. None of the above

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FINAL EXAM (OPEN)12. On a tank roof plate two corroded areas was observed at

locations A and B for location A, average thickness = 0.085inches, area = 105 in2

Location B, average thickness = 0.095 inches, Area = 105 in2your decision will be:

a. Both A and B are within limitsb. Location A is OK, location B is art of limitsc. Both A and B are out of limitsd. Location B in OK, location A is out of limits

13. Hot tap connection is to be made on tank with followingdescription shell plate thickness = 314 inch. Design temperature= 30°F the plates were not tested for impact testing, (Consr.Code API 650-1974) . What will be the maximum size of tappingconnection?

a. 8 inches NPSb. 6 inches NPSc. 10 inches NPSd. 4 inches NPS

14. A replacement plate to be used on a shell th ickness of 5/8 inch,on the second course of the ta nk. Thickness of firs t course andth ird course is also 5/8 inch . Following 3 plates are availablewhich one is most suitable to be used as replacement plate.

a. Plate thickness = 314"b. Plate thickness = 5/8"c. Plate th ickness = 1/2"d. Plate th ickn ess = 1"

15. A tank is having remaining corrosion allowance of 2.5mm andcorrosion rate of the shell is O.lmm per year. What will beinspection int erval for next ultrasonic thickness inspection fromouts ide of the tank?

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FINAL EXAM (OPEN)

a. 15 Yearsb. 12.5 Yearsc. 10 Yearsd. 5 Years

16. Typica l corroded areas on a shell plate are exhibited below infigure 1 with measured thickness in inches ind icated on thesketch . The uri-corroded thickness of the shell plate is 0.750inches and C.A is 0.125"

Figure 1

AREA "A".65

0.66

0.72

0.54

0.750 .72

0.75

AREA "B"

AREA " C"

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FINAL EXAM (OPEN)

The total length of a arrow line drawn is 8 inches. The length of theline in each of the corroded areas A, 6 and Care 1.5", 0.8" and 0.5inches respectively.

Comment on the acceptability of the corroded condition.

a. The pitting can be ignored as a case of widely scatteredpitting as both pitting depth and dimensions are withinlim its

b. Not acceptable as size are not OK, total length of the pitdimensions is more than permitted

c. The pitting can be ignored as a case of widely scatteredpitting since depth are OK

d. The pitting cannot be ignored as a case of widely scatteredpitting since depth are not OK

17. Two plates samp le A and 6 were tested for longitudinal impacttesting. Following were results observed. They belonged toGroup No. I as per API 650:

Results of impact test for sample A were 18ft Ib, 8ft Ib, 16ft lb.Results on sample '6': 12ft Ib, 14ft Ib, 20 ft. Ib

Your assessment will be:

a. sample A and 6 both OKb. sample A and B both to be re-testedc. samp le 6 is OK, A shall be re-testedd. sample a is OK, 6 shall be re-tested

18. For replacement to an existing 0.25" thick shell plate of an AST,another plate of 0.25" thickness to ASTM A36 is used. Whatshould be the minimum clear distance between the outer edgesof the adjacent but t welds of vertical and horizontal joints,respect ively?

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FI NAL EXAM (OPEN)

a. 10" & 6"b. 6" & 3"c. 8 " & 4 "d. 12" & 6"

19. Repair of a 5/8" thick shell , using lapped (lap welded) patchplate of 1/8" thick was carried out, without informing theOwner. Such a repai r is not acceptable as per API standard653, because:

a. Owner had not specified use of patch plate repairsb. Lap patch plate of less than 3/16" is not permittedc. Lap patch plate repair on shell thickness more than

above Y2" is not permittedd. All of above

20. As per API Standard 650, the offset between vertical seams ofadjacent shells shal l be a min imum distance of:

,\

a.

b.

c.

d.

5 t , where 't' is the plate thickness of th icker shellcourse at the offset4t, where 't' is the plate thickness of thicker shell courseat the offset3 t , where ' t ' is the plate thickness of t hicker she llcourse at the offset2 t, where 't' is the plate thickness of thicker shellcourse at the offset

21. When butt welded annular bottom plates are used, in an ASTbuilt to API Standard 650, their width from inside of the shellshall be at least:

a. 900 mmb. 300 mmc. 600 mmd. None of the above

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FINAL EXAM (OPEN)

22. Misalignment in a completed 20 mm thick vertical seam of anAST built to API Standard 650 shall be more than:

a. 2 mmb. 1.5 mmc. 0.8 mmd. 3 mm

23 . Out of roundness measured as deviation from radiusmeasured 1 foot above the bottom corner weld of alSO ftdiameter AST built to API Standard 650, shall not exceed:

a. 1" (25 mm)b. V2 " (12.7 mm)c. 3/4 " (19 mm)d. 1-1/4" (32 mm)

24 . Local deviations from theoretical shape of an abovegroundstorage tan k (AST), built to API Standard 650, specifically" Peaking" at vertical joints or " Banding" at horizontal weldjoints as measured over an appropriate sweepboard of 36" shallnot exceed:

a. 19 mm (3/4")b. 13 mm (1/2")c. 16 mm (5/8")d. 1/8 mm (3")

25. An AST has remaining corrosion allowance of 3.2 mm. Theknown rate of corrosion of shell is 200 microns per year. As perAPI Sta ndard 653, when should the external v isual inspect ionby an Authorized Inspector shall be carried out at an intervalnot exceeding:

a. 5 yea rsb. 8 yearsc. 4 yearsd. 15 years

------------------------- End -------------- -----------

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FINAL EXAM (OPEN)Answer Key

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Q. No. I Answer I" I ~. ", o~"""« L =;., ~Refer~nce .;;?.... ~"e' ,::' :; ,"

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21 1 e l l API 650. 3.1.5.422 1 A , 1 'I API' 650'" ~. 5 2 3 1~-" .... ' -~ "'", '.;.

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Page 1 of5

DAILY EXAM 5 (CLOSED)

Note: Encircle the letter of only one alternative which you think is most appropriate,

1. Guided bend test represents :

a, Ductility of weldb. Strength of weldc. Soundness of weldd. Both soundness and ductility of weld

2, All positions of groove welds are qualified by

a, pipe positions lG and 5Gb. pipe positions 2G and 5Gc. pipe position 6G onlyd. band c

3. According to ASME Sec, IX, A welder for SMAW can bequalified by following minimum tests:

a. 1 tensile and 2 bend testsb. 2 bend tests onlyc. 2 tensile tests and 1 bend testsd. 1 tensile and 1 rad iography

4. Procedure Qualification Record is a document which can berevised time to time.

a, Trueb, FalseCo Depends on company policyd. Depends on client of the company

5. Use of Radiography is made for :

a, Performance qualification only,b. Procedure qualification onlyc. Both a and b

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d. Use of Radiography is not permitted by.ASME Sec. IX.

6. Procedure Qualification is done by:

a. 1 Tensile and 2 bend testsb. 1 tensile and 1radiographyc. 1 bend test and 1 radiographyd. 2 Tensile and 4 bend tests

7. Which of the following represent grouping of weld-metals inASME IX?

a. P - Nosb. F - Nosc. S - Nosd. A - Nos

8. For A 516 gr 60 (SMTS = 60000 psi) material, following resultswere obtained for two tensile test specimens in PQRqualification.

Specimen T1: failed in B.M. at 57AOO psi

Specimen T2: failed in weld metal, at 59,500 psiYour assessment is:

a. PQR test is ok since both are within acceptance criteriab. PQR test is rejected as both T1 and T2 are not within

acceptance criteriac. PQR in rejected because T1 is ok but T2 has failedd. PQR in rejected because T1 is fai led thoughT2 is ok

9. Based on a measured corrosion of 0.006" annually and using acorrosion allowance of 0.120", what is the interval for the nextUT thickness measurements on shell are required for AST?

(a) 10 years

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(b) 6.5 years(c) 20 years(d) 15 years

10. Per API 650, calculation of shell thickness by the 1-foot methodcannot be used for tanks :

(a) Under 200 ft. in diameter

(b ) Over 200 ft. in diameter

(c) Under 150 ft. in diameter

(d) Of any size

11. Impressed current system results in following advantagescompared to Galvanic System.

a. Can be used for large structures

b. Maintenance cost is lower

c. Installation is cheaper and easier

d. No external power supp ly required

12. Power source for impressed current system sha ll be checked atintervals not exceeding:

a. Annually

b. Six months

c. Two mo nths

d. Five yea rs

13. Thick fil m lining means thickness:

a. Greater t han 10 mils

b. Equal or greater t han 20 mils

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Page 40f5


c. Greater than 20 mils

d. Equal or greater than 10 mils

14. Sand blasting and painting operations shall not be performed ifhumidity exceeds:

a. 90%

b. 80%

c. 85%

d. 95%

15. Which of the following statement is correct?

a. Soil resistivity is a measure of resistance offered by soil todrill ing operation for oil exploration and it has noconnection with corrosivity of soil.

b. Lower soil resistivity indicates less corrosive soil.c. Soil resistivity has nothing to do with corrosive ness of soil

because soil corrosion depends on the amount of corrosivechem icals present in the soil .

d. Higher soil resistivity indicates less corrosive soil.

16. The preferred method for inspecting non-metallic coating is:

a. Visual inspection onlyb. Holiday detectionc. M.P. checkd. D.P. check

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17. The accuracy of a piece of magnetizing equipment that isequipped with an ammeter shall be verified:

a. Each yearb. Each two yearsc. When possibled. Every 6 months

18 . It is decided to carryout a surface NDT for austenitic 5.5. welds.Choose a best combination.

a. Penetrant testing with Halogen free developerb. Penetrant testing with any aqueous developerc. Magnetic particle testing with wet particles .d. Magnetic particle testing with dry particles

19. In ultrasonic testing, for thickness measurement on corrodedsurface, use:

a. CRT read outb. Digital read outc. Any of aboved. None of above

20 . For which of the following can yoke technique be used?

a. Sub-surface cracksb. Surface cracksc. Both a and bd. For none of a and b

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Page 1 of 1

DAILY EXAM 5 (CLOSED)Answer Key

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3 B ASME Sec. IX Table OW - 452.14 B ASME Sec. IX OW - 200:2 (c)

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L~ ~

9 A API 653 6.3 .3 .2 (b)10 B API 650, 3.6.3 .1 ~ ~- _. ....11 A API 651 6.3.312 C API 651 11.3.3.1 ':--. ,\,~

13 C API 652 6.114 B API 652 7.4 and 8.3 -" , -15 D API 651 Table 116 B API 575. 7.4.7 - ~ ~ '" " ·.i'~ ,17 A ASME Sec. V T-76118 A ASME Sec. V, T-641 --,19 A ASME Sec. V SE - 797 Para. 820 B ASME Sec. V T - 776.1 ito"'! .--21 --------- ,---------------------------------------------------------22232425

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Frof::;ssiona.! Tra ining and Consu ltat io nAPI 653 Preparatory

2 6 th up to 3 1st Aug ust 2006~ AJ-Khoba r, KSA.Page 1 of 5


Note : Encircle th e letter of only one alternative which you think is most appropriate.

1. A hydrostatic test for a relocated tank:

Ldi!' May be waived by the Owner/Operator~ Is required

c. May be waived by the Inspectord. I s not necessary

2. Minimum th ickness of tank bottom in critical zone shall be atleast 0.1 inch but also it shall be:- -a. Greater of: V2 tmin for lowest shell course and half of

orig inal thickness in critical zoneLA>. Smal ler of: 112 tmin for lowest shell course and half of

original thickness in cr itical zonec. 0.1" onlyd. 0.05" as from Table 6-1, if leak detection system . is

provided

3 . During the hydrostatic test, no less thanmeasurement points shal l be surveyed.

-0 . 8b. 10c. 15d. 5

settlement

4. For vacuum box test, a partial vacuum of at least shallbe used using to check the cracks.

·/'a. 3 psi, penetrating oilb. 5 psi, water immersion

-.....cc.- 3 psi , film solutiond. 5 psi, liquid penetrant

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API 653 Preparatory26th up to 3 1sl August 20061 AI-Khobar, KSA.

Page 2 of5

:--- ---- --- - -? iores s; onal Trai nf ng and Consu ltation


5. Which tests are usually conducted to verify acceptability of shellto bottom plate welds! .

a. Penetrating oil .b. RTc. Vacuum box test

\...,/""' d . "a" and "c"

6 . Except for cast iron parts, internal coils and supports may be:,

a Dye penetrant testedb. Leak tested

.,..-c Hammer testedd. Magnetic particle tested

7 . At the next out-of-service inspection on a tank that has had ahot tap performed, the visual inspection should include:

a. Size of t he hot tap nozzle holesb. Thickness of the plate at the hot tapc. Height of the hot tap from the tank bottom

t...d-:' Trimming of the hot tap nozzle holes

8. The term "roof drain" is applicable for which type of tanks?

a. Tanks with a breather device inst all ed on the roofb. High octane fuel tanks (Dome roof tanks)

~c. Tanks with floating roofs (open top-tanks)d. Tanks with internal floating roof

9 . Industry experience and laborat ory test have shown that amembrane stress in tank shell plates of at least isrequi red to cause failure due to brittle fracture?

a. 500 psib. 100 Mpac. 7 ksid. 18 kg/ m m2

0' <Iocr . Al - Subeaet Towers. King Abd elaziz co-. Prince Fatsal Sin Fahd St reets , AI-Khobar, Saudi Arabia

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Page 3 of 5


10. Which of the following is an advantage of magnetic particletesting over penetrant testing?

a. it can detect surface discontinuities with foreign materialimbedded in them

b. It is faster on individual partsc. It can detect near-surface discontinuitiesd. All of the above

11. Which of the following types of discontinuities is not normallydetected by radiography?

a. Cracksb. Incomplete penetration

L-C Lam inationsd. Slag

12. The reason for periodica l inspection of ASTs is to:

a. Determine their physical condition, J b. Determine the rate of deterioration

c. Maintain safe operating conditions~ All of the above

13. Resistance of grounding connection shall not be,

t.z:" more than 25 Ohmsb. less than 1 Meg-Ohmc. less than 25 Ohmsd. more than 5 Ohms

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26th upto 31 $1 August 2006, A/~Khobar, KSA.Page 4 of 5


14. Internal inspection is primarily to:

va . All of the below

b. Ensure that the bottom is not corroded and leaking;

c. Gather data for shell assessment

d . Identify and evaluate bottom settlement.

15. Repairs on butt welds shall be radiographically examined by:

~

b.

c.

:.<-CEY.

Full radiography over entire repaired lengt h of we ld

1 spot on repair portion for each vertical weld

1 spot on each 50' for horizontal weld

"b" and "c"

16. The API 653 standard covers the maintenance inspection,repairs, alteration , relocation and reconstruction of tanksconstructed to as basic standards though itmay be adopted for other tanks also.

a . ASME

b. API 651

c. API 652

c/d . API 650

17. The complete or partial removal and replacement of morethan 12 , inches of a vertical weld joining shell plates iscons idered a: . '

a. minor alteration

b. minor repa ir

v c. major alteration

'" d. major,repair

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Page 5 of 5

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The difference between peaking and banding is:

a. peaking pertains to the roof;

b. banding is external to the tank;

t- ". peaking pertains to vertical weld seams, bandingpertains to horizontal weld seams;

C€l-:" peaking pertains to horizontal weld seams, bandingpertains to vertical weld seams.

18.

19. The minimum interval for external inspection by a qualifiedinspector is __ years or at the quarter corrosion-rate life ofthe shell, whichever is less:

a. Twenty

<-1J. Five

c. Ten

d. Fifteen

20. The minimum retirement th ickness of an annular plate ring isusually greater than:

~ 0.10 inch

b. 0 .25 inch

c. 0.0625 inch

d. 0 .1875 inch

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API 653 Preparatory26"' upto 31" August 2006, AI-Khobar, KSA

Page 1 of 1


'iefer~nce-#», . .,.:;,;"'i~

Q. No. Answer , 4;;:-<'~%" .~;*-i

1 B API 653, 12.3.1.1 (a)2 B API 653 4':4.7.4 • ~ .....st.i'. ., ,.;"'b.,,;;:,~ ",,J\':'.ti;:~-1.?.'f>);;.Jl

3 A API 653, 12.5.1.24 C API 650. 6.6.3 " '... 2. ~ u ,~~c=?L"

5 D API 653 12.1.6.16 C API 574. 7.4:9 ":-= ,.",~, 'i. ""'-'jl~~, .,.~ ji-~,

7 D API 653 9.14. + General Knowledqe8 C Ge nera l Knowledoe for Tank Insoector;;:''?1!),';''''\' '>'2 iFrr."",•..?t'j;i-~9 c API 653 5.3 .6

10 D General Knowledne for Anv Insoector . !~ _;' ~~, ff.t~

11 C ASMEV. Art. 2 + General Knowledqe12 D API 575. 5.1 " .:.- . i:' ~; ..."',..;\,C-r -

13 A API 575, 7.2.614 A

,API 653. 6.4.1.1- " .. - ~ '''!,-. ,'{' '''' ;l?:':

15 A API 653 12.1.3 .2016 D API 653. '1.1. 1 ;>j; -" ,

17 D API 653. 12.3 .1.2 (c)1718 .eD API 653. 10.5.4 , ;.;i ~ ~ -, i l ,,';c ,;tt""'''\'i;r~

19 B API 653. 6.3.2. 20 A API 653 4.4.8.1 ~ i ' ',.t' ~ ; 'f~' "~.'" :-ii-:J '.....'.<dO;

21 ----- ---- -------------------------------------------------------. -22232425

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AP/653 Preparatory

26th upto s t « Aug ust 2006, AI-Khobar, KS"A.

Page lofS

DAILY EXAM 3 (OPEN)

Note: Tick only one alternative which you think is most appropriate.

1. Typical corroded areas on a shell plate are exhibited below in Figure1 with measured thickness in inches indicated on the sketch. Theminimum required thickness of the shell plate is 0.750" and C.A.required is 0.15".

Figure 10.65 X

0.66 x

x 0.72

xO .54

x 0.75

x 0.72

x 0.66

x 0.75

0.72

AREA "A"

AREA "S"

AREA "C"

:. . ~<;>

The total length of arrow line drawn is 8 inches. The length ofthe line in each of the corroded areas A, Band Care 1.5",0.3" and 0.2" respectively. Comment on the acceptability ofthe corroded condition.

"'8. Acceptableb. Not acceptablec. Conduct a patch plate repaird . The pitting can be ignored as a case of widely scattered

pitting

b : ~ f lDCI . _~j - Subeaei 1 0':; 1;: 1"5. KIng Abd ulaztz COl . Prince Faisal Bin Falla Streets. Al- Khobar . Saud i .Arabia

• 'TE L ::)65'1 ~ BS7 5533 0' f AX (9(,6) 3 BS7 6565 c mfo':"DgOto i:c.com 0 www.qc tcnc.com

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API6S3 Preparatory

2 @h upto 311t August 2006, AI-Khobar, KS'A.

Page20fS

DAILY EXAM 3 (OPEN)

2. A tank is constructed as per API 650. Its original thickness is 0.500inch. Its diameter is 25 feet and height is 15 feet. After 10 years,the tank is inspected ancithe following readings are recorded on theshell. Figure 2 exh ibits a corroded portion of the developed shell ofthe tank from the inside. The designed corrosion allowance is0.125". Minimum thickness (t2) is among the following readings.

Plane A Plane B Plane C Plane 0

0.345 0.500 0.450 0.480

0.400 0.450 0.400 0.475

0.500 0.435 0.330 0.315

0.480 0.475 0.350 0.275-0.495 0.485 0.375 0 .300

0.480 0.450 0.400 0.350

0.485 0.470 0.425 0.400

t' ,'-I ~ b

Fi gur e 2a· -n·'

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AP/653 Preparatory

26th upto 31S' August 2006, Al - Khobsr; KSA.Page 3 of5

DAILY EXAM 3 (OPEN)

What is the minimum thickness recorded?

a. 0.315"vb . 0.275"

c. 0 .330"d. all of the above

Calculate the critical L dimension for this cond ition3 .

.....-a.b.c.d.

9 .7"4 0"12"All of the above

~S "" " .2; 5L -; 3 '}

... q .1-'"

For the same conditions of Figure 2 if the location of the bottom ofthe critical length is 2 feet from the tank floor and the designedliquid height is 12 feet what is the value of H in the formula fo rcalculating tmin? \) .

4.,;V

~.....a. 3 feet o •

l I b. 15 feetvt. 10 feet

d. 13 feet

5 . Find the value of S which may be assumed for the lower course ofold tank for calculat ing tmin considering the fact that the material isA516 gr 70.

04. 30,000 psib. 18 ,000 psic. 23,995 psid . 23,595 psi

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AP/653 Preparatory

2(jrh upto st« August 20061 AI-Khobar, KSA.Page 4 arS

DAILY EXAM 3 (OPEN)

6. Find the value of the allowable stress in the first shell courseof the conditions of the tank considered in above question ifmaterial is not known .

a. 4680 psiVb. 23600 psi

c. 2550 psid. 30000 psi

7. From t he data of Figu re 2, wh ich of the plane above will beconsidered to calculate t 1?

a. Plane ab. Plane bc. Plane c

vet. Plane d

8. What will be the value of t 1 for above question?

\

a.b.c.

Jd .

0.380"0.397"0.468"0.371"

9. A corroded roof plate is found to have an average thickness of0.1" measured over an area of 100 sq. inches. This area shallbe:a. Repaired or replaced

.AS. Found to be acceptablec. Repair is prohibitedd. Replacement is mandated

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AP/ 6S3 Preparatory

2@h upto st« August 2006, AI-Khobar, K:S"A.

page50f S

DAILY EXAM 3 (OPEN)

10. When determining average thickness in a corroded area of ashell, a minimum of equally paced measurements shall betaken ove r a lengt h of L. Spa'.)

a. 10vb. 5~. 8

d. 6

11. Vertical we lds must be ful ly radiographed if the shellthickness exceeds inches:

a. 3/4Ur. 1

c. 1 - 1/4d. 1 - 112

12 . Anticipated minimum thickness of tank bottom where bottom/ foundation design provides for leak detection andconta inment is:

a. 0 .10 inch----6, 0.05 inch

c. 0.09 inchd. same as wit hout leak detection and conta inment

----------- ------------------ End ------- ----------------- - - ---

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Q1.

DAILY EXAM 3 (OPEN)

Solution

The pits are acceptable if: ~'1-a. Thickness at bottom of pit (excluding C.A.)~h tmin.; andb. Sum of dimensions in 8" lenqth s 2"

In the example,

a. The minimum thickness at bottom of the pit = 0.54"The thickness e~s:luding C.A. = 0.54 - 0.15 = 0.39"This thickness ~ V2 tmln0 .39" @:}V2 (0.75), i.e. , 0.39" ~ 0.375" ---------- OK

,..-b. Total sum = 1.5 +0.3+ 0.2 = 2" - - - - - - - - - OK

I~~ ANSWER: A

Q2. Minimum thickness (tz) = 0.275

ANSWER: B

Q3. L = 3.7~Dt2 =

ANSWER : A

3.7~25 x 0.275 = 9.7

Q4. liquid height = 12'

H = 12' - 2' = 10'

ANSWER:

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DAILY EXAM 3 (OPEN)

Solution

Q5. Refer Table 4-1

S = 30,000 psi

ANSWER: A

Q6. Consider the value for:

Y = 30,000 psi and

T = 55,000 psi

Refer Table 4-1

ANSWER: B

Q7. The total of thicknesses taken on plane D works out to =2.595" which is smallest of all planes A, B, C, and D.

ANSWER : D

Q8. Value of tl = 2.73/7 = 0.371"

ANSWER: D

Q9. The thickness is more than 0.09" - - - - - - - OK

ANSWER: B

Q10. ANSWER : B

Q11. ANSWER: B

Q12. ANSWER: B

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DAILY EXAM 3 (OPEN)Answer Key

Q. No. Answer Reference ..

1 A API 653 4 .3 .2.22 B API 653 4.3.2.1(~ - - "'";, .3 A API 653 . 4 .3 .2 .1 (b)4 C API 653. 4 .3.3.1 ' ~ ~ - ,,, ,.......,5 A API 653 Table 4-16 B API 653 . 4.3 .3.1 ~

7 D API 653 . 4.32.1 (c)

8 D API 653 4 .32.1 (c).

9 B API 653, 4 .2. 1. 210 B API 653 4.3.2.1(C) . ""' "

11 B API 650. Ro.6-112 B API 653. Table 6-1 I 't.• ~ .,..,' ,.;; "" .,"

----- -- ------------ ---------------------------------------------------------

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Note: Encircle the letter of only one answer which you think is most appropriate.

1. Maximum design internal pressure in an AST referred to by API650 and API 653 is:

vii. Not exceeding 2.5 psigb. 15 psig approximatelyc. Not exceeding 5.00 psigd. None of the above

2. As per API 650, the design metal temperature of an AST is basedon the lowest one-day mean temperature in the locality wherethe tank is installed, it is:

a. 15°C above the lowest one day mean temperature of thelocality

vb. 8°C above the lowest one day mean temperature of thelocality

c. Same as the lowest one day mean temperature of thelocality

d. 5°C below the lowest one day mean temperature of thelocality

3. In an AST built to API Standard 650, the minimum nominalthickness of bottom plates, exclusive of specified corrosionallowance shall be:

a. 12.7 mm (1/2")b. 8 mm (5/16")

.,c, 6.0 mm (1/4")d. 5 mm (3/16")

4. The fu ll course width for shell plate as per API 650 shall beminimum:

vB. 72"b. 96"c. 60"d. 90"

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5. In accordance with API Standard 653, Repairs and Alterationhave been defined as distinct activities. State which of thefollowing activities does not constitute an Alteration?

a. The addition of man-ways and nozzles greater than NPS 12b. Increase and decrease in tank shell height

0. Replacement of damaged flange on nozzle by flange ofsame size and material

d. All of the above

6. In accordance with API Standard 653, Repairs and Alterationhave been defined as distinct activities. Activity which entails anywork necessary to maintain or restore a tank to a conditionsuitable for safe operation. State which of the following activitiesdoes not constitute repair?

a. Re-Ieveling and/or jacking of a tank shell, bottom or roofb. Addition of reinforcing plate/s to existing shell

penetratlon/s<c. Changing the content with higher specific gravity

d. Repair of flaws, such as tears or gouges, by grindingfollowed by welding

7. In accordance with API Standard 653, Critical Zone for repairs toa tank bottom is that portion which is:

a. Measured vertically upwards along shell , within 6" of tankbottom

./IS. Measured radially inward, within 3" of the inside edge ofshell

c. Measured radially outward within 1 '12" of outside edge ofshell

d. A circular area measurable radially within 12" from centerof tank bottom

8. Normally the corrosion rates of the tank bottom control theinspection interval, which are based on the actual or anticipatedrates of corrosion. In the case of a tank, where corrosion ratesare not known, and where similar service experience is not

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AP/ 6S3 Preparatory

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Page 3 of6


available, the actual thickness of the bottom is to be determinedby due inspections within:

a. 20 yearsb. 5 years

---c. 10 yearsd. 2 years

9. In case of the following cond itions, the risk of failure by brittlefracture in an AST built to API Standards is minimal:

a. Tank shell thickness 5/8" and shell metal temperatures at20°F and above

_b. Tank shell thickness 1jz" and shell metal temperatures at60°F and above

c. Tank shell thickness 3/4" and shell metal temperatures at32°F and above

d. Tank shell thickness 1" and shell metal temperatures atOaF and above

10. As per API Standard 653, a routine, in service, close visualexternal inspection of an aboveground storage tank CAST) shallbe done, at an interval not exceeding:

a.dla.~

d.

One yearFive yearsOne monthTen years

11. As AST has a measured shell thickness of 0.75"; and itsminimum required thickness is OS'. The known rate of corrosionof shell is 5 mils per year. As per API Standard 653, when shou ldthe externa l visual inspect ion by an Authorized Inspector becarried out at an interval not exceeding ?

a. One year~ Five years

c. Twelve and half yearsd. Ten years

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12. An AST has a measured shell thickness of 0.75; and its minimumrequired thickness is 0.5". The rate of corrosion of shell is notknown. As per API Standard 653, the external ultrasonicthickness measurement shall be carried out an interval notexceeding:

a. One yearv-lr. Five years

c. Six & half yearsd. Ten years

13. An AST has a measured shell thickness of 0.75"; and its'minimum required thickness is 0.5 ". The known rate of corrosionof shell is 5 mils per year. As per API Standard 653, t he externa lultrasonic th ickness measurement shall be carried out at aninterval not exceeding:

a.b.~

d.

One yea rTwenty-five yearsFifteen yearsTen years

14 . Corrosion on the bottom side of floor plates in abovegroundstorage tanks is affected most by:

a. Composition of the contents stored in the tank <.

b. Welding procedures used during construction of the ta nkc. The metal used for construction of the t ank floor

'--'"t'l. Soil characteristics directly underneath the ta nk

15. If arc strikes, gouges, or tears from temporary attachments areident if ied, th ey:

~ Must be evaluated on a case-by-case basisb. Must be repaired by welding with an appropriate repair

procedurec. Must be repaired by removing the plate area conta ining the

scars and welding in a butt-welded patchd. Are acceptable, provided they are more than 2 feet from

any weld seam

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AP/6S3 Preparatory

26" upto 3 I" August 2006, Al -Kbobsr, KSA.Page Sof6


16. Reinforcement pads shall be tested by applying pressurebetween the tank shell and reinforcement plate using the telltalehole. How much pressure is used to perform this inspection?

a.b,c.~

15 psig hydrostatic pressure5 psig pneumatic pressure5 psig hydrostatic pressure15 psig pneumatic pressure

17 . According to API 653, authorized inspection agency is :

a. Inspection organization of jurisdictionb. Inspection organization of insurance company which

underwrites insurance of storage tanksc. Inspection organization of owner-operator~ Any of the above

18. For all repairs and alterations under API 653 , the ultimateresponsibility rests with:

......a.- Owner-operatorb. API Committeec. API 653 Inspectord. Jurisdiction Authority

19. In API 653, the term "RBI" mea ns:

a. Repairing Before Inspectionb. Report Based Inspectionc. Repair Based Inspection

--e~ Risk Based Inspection

20. Partial or complete jacking of a tank shell is considered :

a. Routine maintenanceb. An alteration

....c-- A repaird. None of the above

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21. A corroded area of a tank bottom plate is filled-up by weldingoverlay. There is no change in the rating and no change is madeon the nameplate. Which of the following is the correct term todescribe this process?

~ Repairb. Alterationc. Can be repair or alterationd. Neither repair or alteration

22. Under wh ich of the conditions listed below is external inspectionof tank bottom plate permitted to be done in lieu of internalinspection?

~ In cases where constructions size or other aspects allowexternal access to the tank bottom to determine platethickness.

b. External inspect ion to determine bottom plate th ickness isnever permitted in lieu of internal inspection

c. For tanks made of materials wh ich have exce llent chemicalresistance

d. All of t he above.

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API 653 Preparatory26th upto 31 st August 2006, AI-Khobar, KSA

Page 1 of 1


l

Q. No. Answer Referencec

1 A API 653 3.32 B API 650 , 2.2.9.3 .'" ;, ..3 C API 650 3 .4 .14 A API 650 3.4.15 C API 653 3.16 C API 653 3.157 B API 653 3 .98 C API653, 6.4.2.29 B API 653, Flq. 5-2 & 5.3.4 & 5.3.510 C API 653 6.3.1.211 B API 653, 6,3 .2 .112 B API 653, 6 .3.3.2 (a) .."

13 C API 653 , 6.3 .3.2 (b)14 D API 653 4.4.7.115 A API 653, 4 .3 .616 D APL650 5.3.417 D API 653, 3.418 A API 653, 1.219 D API 653 3.4.320 C API 653 3.1521 A API 653, 3 .1522 A API 653 6.523 ---------- ----------------------------------------------------------2425

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API 653 Preparatory26th upto 31 s t August 2006, AI-Khobar,KSA

Page 10f 4

DAILY EXAM 1 ( OPEN)

Note : Encircle th e letter of only one answer which you think is most appropria te.

1. AST fabricated to API 650 (Basic Standard) is normally designednot to exceed an operating temperature of:

a.b.

~

260 deg C100 deg C90 deg C21 deg C

2. Minimum size of fi llet welds in the construction or repairs of anAST built to API Standard 650 is:

a.

b.

@

d.

Higher of 6 mm (0.25") or half of t he th ickness of thinnerplate joined.Higher of 9 mm (0 .25 ") or one third of the thickness ofthicker plate joined.Higher of 5 mm (0.1875") or one third of the thickness ofth inner plate joined .Lower of 6 mm (0 .25 ") or half of the th ickness of thinner ,plate joined.

3. As per API Standard 650, t he ove rlap at lap-welded joints shallbe at least five ti mes the nominal th ickness of t he thinner plate,but need not exceed, ,

a.

c.

d.

2" for sing le-welded lap joints and 4" for double weldedlap joints1" for single-welded lap joints and 2" for double weldedlap j oints1.5" for single-welded lap joints and 2" fo r double weldedlap j oints1.5" for sinql e- weided lap j oints and 1" for double weldedlap joints

4. Calculate by t he 1-Foot method the design shell thickness Td ininches, of the following description of tank built to API Standard650:

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Page 20f4

DAILY EXAM 1 ( OPE N)

H = Design liqu id level = 50 feetD = Nominal Tank Diameter = 180 feetG = Design Specific Gravity = 0.86CA = Corrosion Allowance = O. 0625"Sd= Allowable stress in design condition, in psiShell Materia l = ASTM A36MTd = design shell thickness, inch(es)St= Allowable stress for hydrostatic test condition, in psiTt = hydrostatic test shell thickness, inch(es).

_ . /

Where, Td = 2.6 D (H -1) G + CASd :: 2-;' 2 0 0

a 0.912"b. 0.850"c.d.

1"0.922"

5. Calculate by t he 1-Foot method the hydrostatic test shellt hickness Tt in inches, of th e above referred tank, when wateris used fo r the test :

Where, Tt = 2.6 D (H -1)St : 2 '1 ' \0 "

a. 0.935"b. 0.985"c. 1"

@ 0.922"

6. Maximum Reinforcement thickness of vertical butt joints of atan k shell plate of 28mm, of an AST built to API Standard 650shall be: -

@.) 5mmb. 2.4mmc. 1.6mmd. 3mm

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API 653 Preparatory26 th upto 31" August 2006, AI-Khobar,KSA

Page 30f4

DAILY EXAM 1 (OPEN)

7. Vertical joints of a 28 mm thick shell of an AST built to API Std.650 shall be radiographed to the extent as given below:

a Fullb. Part ialc. Spotd. Nil

(8 . In an AST built to API Standard 650, the bottom annular plates

have radial weld joints, and are single butt welded withpermanent back-up bar, in which case, the extent ofradiographing radial joints shall be,

a.b.c.d.

One spot on 50% of radial jointOne spot on 10% of radial jointsFull radiography of all radial jointsRT - Nil; only MT of 100% joints is adequate.

9. As per API Std. 650, personnelradiographic examinations (RT)qualification as follows:

who perform and evaluateshall have a minimum

a. Shall have a vision of Jaeger No.2 .~ Shall be qualified as Level II of ASNT SNT-TC-1A

c. Shall not be color blind .d. Shall have an experience of at least te n years in RT.

10. The minimum required shell thickness of a Tank of 60 Meterdiameter (200 ft. diameter), built to API Standard 650, shall be:

a. Design shell thickness plus corrosion allowanceb. Hydrostatic Test shell thicknessc. 8 mm (5/16")

@ G reate r o f a, b , c

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Professional Training and ConsultationAPI 653 Preparatory

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DAI LY EXAM 1 (OPEN)

11. Determine whether impact testing is required for A516 gr 70normalised plates 1 inch thick, Design temp = 0 degree F (-18degree C):

a. Not requ ired@ Requiredc. Depends on opinion of design eng ineerd. Depends on opinion of tank inspector

12. Which of the fol low ing sets of t he Transverse Charpy V-notchImpact Test Values of a fully ki lled 0.75 " thick plate of ASTM A516 gr 60 for a design metal temperature of -34 degree C, isacceptable as per API 6507 Plates are not normalized.

a. 20, 11, 12 Joules y

@ 18, 24, 12 Joules ~c. 24, 22, 10 Joules "d. 20, 10, 27 Joules <,

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Page 1 of 1

DAILY EXAM 1 (OPEN)Answer Key

1 C Ref.: API 650 , 1.1.12 C Ref. : API 650. 3.1.3.33 B Ref.: API 650, 3 .1.3 .54 A Ref.: API 650. 3 .6.3 .2 (td )

5 D Ref.: API 650 3.6.3 .2 (tt)6 A Ref. : API 650 5.2.1.5 h Q ~- ~, \ ) \("•.,.: r. d

7 A Ref. : API 650. FiC!. 6-1 Note 68 A Ref . : API 650 6.1.2.99 B Ref. : API 650 6. 1.3.210 D Ref.: API 650. 3.6.1.111 B Ref. : API 650 Table 2-3B & Fio. 2-112 B Ref.: API 650 , Tabl e 2-413 -----------------------------------------------14151617181920212-2 ,232425

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API 653 Preparatory26 th upto 31 st August 2006, AI-Khobar,KSA

Page 10f4

BENCH MARK QUIZ

1. Open-top type tanks (With floating roof) are typicallyadopted for storing petroleum products that are :

a.b.

v©d.

Non-volatileHeavy distillates (e.g. Bitumen, a~Rh91t etc)VolatileAll of above

2. The term "Critical Zone" in storage tanks refers to:

- 't~~~~ ·

a.

b.c.

v@

Lower part of shell interior, which is welded tobottomUpper part of shell interior, which is we lded to roofLower part of roof exterior, which is welded to shellAnnular part of bottom interior, which is welded toshell

3. API 650 code is tank construction code fo r :

va.b.c.

T@)

Atmospheric Storage tanksTanks with pressure up to 15 psigAboveground tanks including Refrigerated tanksAll of above

4. The terms "Sketch plates" and "annular plates" refer toPlates in :

a.J@

c.rlu.

Tan k roofTank bottomTank shellNone of above

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API 653 Preparatory26'h upto 31 s' August 2006, AI-Khobar,KSA

Page 2 of4

BENCH MARK QUIZ

5. Hydrostatic testing of tank shells is:

c.

d.

Basically water fill testConducted at 1.1 t imes the static column pressure ofproductConducted at 1.0 times the static column pressure ofproductHighest Pressure value of a, b, c above

6. Internal inspection of tanks during shut-down is essentiallyfor inspection of:

a.v ®

c.d.

Tank roofTank bottomTank shellTank Nozzles

7. During tank inspection, the inspector should be more strictwhile inspecting:

+ @tJJ~

c.d.

The shell Horizontal weldsThe shell vertica l weldsBoth a and b. are equally criticalThe roof welds

8. Cathodic protection is provided to tanks normally for guardingthe:

a.b.

Le:'"-r@

The tank shell against product corrosionThe tank bottom against product corrosionThe tank bottom aqclnst soil corrosionBoth band c

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API 653 Prepa ratory26'h upto 3 15

' August 2006, Af-Khobar,KSAPage 3 of4

BENCH MARK QUIZ

9. For the new tanks to be constructed to the API 6S0-BasicStandard, radiography for shell butt-welds ls:

b.

c.

Optional and its extent depends on the Joint efficiencyused for designOptional and its extent depends on the Plate thicknessused for shellMandatory and its extent depends on Joint efficiencyused for designMandatory and its extent depends on the plate th icknessused for shell

10.

J

" Vacuum box testing " is Typical testing, normally applied for:

a. Bottom weldsb. Mandat ory for shell welds, optional for bottom weldsc. Mandatory for shell welds, optional fo r roof weldsd . Pad testing

11. When t he tank is empty, t he float ing roof of open-top tank is

a.b.

J @d.

At its top-most positionRest ing on t he bottomRest ing on the legsMay be at any locatlon

12. Since the t ank is neither a pressure vessel, nor the piping, thewelding procedures and welders for API 650 tanks are qualifiedas per:

a.b.

\..-e:'.,@

AWS D 1.1 .API 1104 v

Still use ASME I XAny of above is OK

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API 653 Preparatory26'" upto 31st August 2006, AI-Khobar,KSA

Page 4 of4

BENCH MARK QUIZ

13. Which of the following is/are mandatory appurtenances forStorage tanks?

a.J ®

c.• d .

Tan k leve l gaugeTank vents ·Pressure guageTemperature gauge / thermometer '"

14. Hot tapping for the tanks are provided in:

a.~

c.@

Vapour space onlyLiquid space only Any of a or bHot taps are not permitted for storage tanks.

15. API 650 covers:

liY.'b.c.

@

Cylindrical , welded, above ground tanks on lyCylindrical welded and riveted tanks -Cylindrical & rectangular, welded & riveted tanksCylindrical & rectangular, aboveground and undergroundta nks '

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API 653 Preparatory26"' upto 31" August 2006, AI-Khobar,KSA

Page 1 of 1

BENCH MARK QUIZAnswer Key

,

Q. No. Answer .. ".

1 C2 D3 A4 B .~

5 A6 B7 B8 C9 D10 A "

11 C12 C .'

13 B14 B15 A

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daily exams api653

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