6. Asme Sec Viii Closed Qb (106-120)

Southern Inspection Services

ASME A SME SEC VIII QB 1. Minimum Design thic kness for a vessel vessel shell is 10 10 mm. Follo Follo win g four plates were received with actual thickness equal to: 10.2 mm, 9.7mm, 10.3mm, 10.3mm, and and 9.6 mm. As per

ASME Sec. VIII VIII Div.1, how m any plates will

you release for vessel fabrication?

a. 1 b. 2 c. 3 d. All 4 2. As per ASME Sec. Sec. VII VIIII Div. Div. 1, if permanent d eformation is ob served due to over pressure during hyd rotesting:

a. The inspector should ask for re-test using proper test pressure and new pressure gauges. b. Follow-up the hydro-testing by a pneumatic test at proper pressure, taking suitable precautions as given in code c. The inspector may ask for providing additional stiffening rings around vessel and carry out re-hydro test at proper test pressure. d. The inspector may reject the vessel. 3. A Shell with nom. I.D. = 2200 mm is rolled and the inspector observed foll owin g readings , D max = 221 2215mm, 5mm, D min = 2195 2195 mm. Should t he shell be:

a. Accepted b. Rejected c. Accept after NDT d. Depends on opinion of inspector.

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4. A horizontal vessel is provided with 2:1 elliptical heads on bot h ends. The tan – t an shel l len gt h = 120 in . v ess el di a = 40 i n. What wi ll be ov eral l len gt h of th e vessel?

a. 150 inches b. 140 inches c. 160 inches d. None of above 5. Acc ordi ng to API 510, authori zed insp ection agency is:

a. Jurisdiction organization b. Insurance company which under writes insurance of pressure vessels c. Inspection organization of owner-user d. Any of above 6. A pressur e vessel has design press ure = 300 psi. Its safe stress values at ambient and designed temperatures are 17100 psi and 16300 psi respectively. The hydrostatic test pressure and inspection pressure for above will be:

a. 450 psi and 346 psi b. 409 psi and 315 psi c. 415 psi and 300 psi d. None of the above 7. The rules for im pact testin g of carbon steel in Secti on VIII vessel materials require what kind(s) of impact test?

a. Brinell & Rockwell b. Izod & Charpy V-notch c. Charpy V-notch only is acceptable. d. Brinell only is acceptable.

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8. Prior to witn essing a pneumatic test of a pressure vessel, the inspector should:

a. Ensure that welds around nozzles were inspected by PT or MT prior to commencement of test. b. Ensure that test pressure is maintained throughout the leak testing inspection. c. Ensure that all butt welds were UT checked prior to commencement of test. d. Both a and b

9. A vessel made with full penetration double welds shows name plate marking of ‘RT2’. The joint efficiency for t his vessel wil l be: a. 0.85 b. 1.0 c. 0.7 d. None of these 10. Who is responsible for transferring the plate marking to the balance plate for a vessel repair wo rk?

a. Authorized inspector who is overseeing the repair activities b. Repair organization who does the repair work c. The plate marking and cutting persons involved in the repair process d. The pressure vessel Engineer who approved the repair work 11. If vess el lon gitu dinal

and ci rcu mferential

welds

are type 1 and s pot

radiographed only, th en stamping on name plate will be:

a. RT1 b. RT2 c. RT3 d. RT4

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12. In the above question, if welds were fully radiographed for their entire length, the purp ose is to co nfor m to ________ stampi ng to be put o n name plate:

a. RT1 b. RT2 c. RT3 d. RT4 13. As per ASME Sec. VIII, Div. 1, in pressure testing, if stress ratio = 1, the test pressure as compared to design pressure shall be:

a. 1.5 times for hydrotest b. 1.3 times for pneumatic test c. Same for both hydro and pneumatic d. None of the above 14. As per ASME Sec. VIII, Div. 1, if p ermanent defor mation is observed due to over pressure during hydrot esting:

a. The inspector should ask for re-test using proper test pressure. b. Follow-up the hydro-testing by a pneumatic test at proper pressure, taking suitable precautions as given in code for pneumatic test. c. The inspector may ask for providing additional stiffening rings around vessel and carry out re-hydro test at proper test pressure. d. The inspector may reject the vessel. 15. Identify inco rrect s tatements. The pressure vess el materials tend t o be less brittle:

a. As material thickness increases b. As service temperature increases above transition temperature c. a and b d. None of above is a correct statement. 16. If the part t o be PWHT’ed is lo nger than t he furn ace, mult iple sh ot PWHT is prop osed. What is the minimu m over lap as per code to ensure proper PWHT?

a. 2 feet b. 5 feet c. 2 meter d. 5 meter

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17. In PWHT of pr essure vessels t hat are built in carbon and l ow-alloy s teels: a. Minimum PWHT temperature increases with increase of vessel thickness. b. PWHT Soaking period increases with increasing vessel thickness. c. Thickness has to be accounted for working out heating and cooling rates. d. Only (b) and (c) above 18. Three corrosi on patc hes were seen on t he shell fo r a tall vertic al vessel to decide their effect on v essel MAWP: a. Work out part MAWP at thinnest patch and that will represent vessel MAWP b. Vessel MAWP does not get affected by thinning of the vessel c. Work out part MAWP for lowest head, and that will represent vessel MAWP d. Lowest value, as worked out by the worst combination of part MAWP and corresponding hydrostatic head at that location 19. When dial-type indicating and recording pressure gauges are used to monitor leak testing, th e maximum gauge range shall not exceed which multiple of the expected test pressure? a. 1½ times b. 2½ times c. 3 times d. 4 times 20. A vessel is to be pneumatically pressure tested to 250 psi. This test pressure will be reached in how many stages of pressurization? a. 5 stages b. 2 stages c. 6 stages d. 7 stages 21. 21. In above question what will be the incremental values of pressurization at first and second stage if pneumatic test p ressure is 250 psi? a. 125 psi, 25 psi b. 50 psi, 50 psi c. 100 psi, 50 psi d. None of above 22. Pneumatic test is proposed f or a v essel ins tead of standard hydro test. Most probable reason for this could be: a. The vessel internal is lined with refractory b. No water is available c. The skirt of the vessel is too week to take care of the static water head and pressure. d. Any one or both of a and c above

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23. In post weld heat treatment ins pection what import ant things yo u will verify: a. Loading temperature and heating rate b. Holding temperature and holding time c. Cooling rate and un-loading (from furnace) temperature d. All of the above are important things to be verified 24. Vessel containing lethal subs tance with s hell thickn ess of 20mm r equires: a. Spot radiography (RT-3) b. Full length radiography (RT-1) c. No radiography (RT-4) d. Penetrant is sufficient if radiography testing is not available 25. In a 30 mm thi ck cylindric al shell, the longitu dinal as well as circumf erential jo in ts are do ub le weld ed bu tt weld s wi th fu ll pen etr atio n. Whi ch of th e followin g is true as regards the longitud inal and circu mferential joints? a. They are of same category but different types. b. They are of same type but different categories. c. Both the category as well as type are same. d. Both the category as well as type are different. 26. Vessel MAWP of exis ting vertic al vessel wi ll be affected f or w hich of t he following? a. If Vessel Part MAWP changes for any vessel part. b. If design pressure is reduced (other factors remaining same) c. Vessel height is changed by adding/deleting a shell course d. A and C 27. A Shell wi th Insi de dia = 2200 mm, and Corr. allow.= 5 mm is to b e designed as per ASME Sec. VIII , Div.1. What will t he value of “ R” in desig n form ula for s hell thickness? a. 1100 mm b. 1105 mm c. 1095 mm d. 1110 mm 28. In thic kness formu la for internal pressure for s hell, term ‘E’ refers to: a. Modules of Elasticity of material b. Thermal Expansion c. Joint efficiency of the weld d. None of above 29. Identify category A joints from f ollowing: a. Longitudinal joints b. Circumferential joints, shell to shell c. Shell to hemispherical head joint d. a and c above

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30. If all other condi tions are remains same the design thic kness of which dished end (Torispherical, Hemispherical, and Ellipsoidal) will be maximum? a. Torispherical b. Hemispherical c. Ellipsoidal d. All will be same 31. Any thickness-offset within the allowable t olerance shell be pro vided a minimum taper transition of: a. 3 to 1 min b. 4 to 1 min c. 3 to 2 min d. 1 to 2 min 32. ASME Sec VIII Div. 1 s pecifi es diff erent acc eptance l evel f or weld reinforcement, which of the following s tatements are true in your opin ion? a. Permitted reinforcement for long. seems is higher than circ. seems b. Permitted reinforcement for long. seems is lower than circ. Seems c. Permitted reinforcement for long. seems is same as circ. seems d. Permitted reinforcement does not depend on location of seems. 33. Vessel MAWP for vertic al vessel is m easured at: a. Top most point of vessel b. Bottom most point of vessel c. At the mid point between top & bottom d. None of above 34. A Pressure Vessel is desig ned for 0.85 join t effic iency w ith f ull p enetration welds. RT requir ement will be: a. Nil b. Spot c. 100 % d. T-joints radiography 35. A vessel with 50 inches OD and 1¼ in. thickness is to be provided Std. torisph. heads. The heads shall be formed with crown radius and min. knuckle radius as follows: a. 25 inch, 4 inch b. 50 inch, 3 inch c. 50 inch, 3¾ inch d. 25 inch, 2 inch

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36. Two head to shell joints, one join ing a seamless Hemisph , head to shell was radiographed for full length and the other joint joining seamless std. torisph. head to shell was spot radiographed, The weld joint efficiency for each of these heads respectively will be: a. 1, 0.85 b. 1, 1 c. 0.85, 1 d. 0.85, 0.85 37. ASME Sec. VIII Div. 1 reco mmends use of U.T. in place of R.T. (for a ful ly radiographed vessel) for: a. All butt welds in vessel b. All butt and fillet welds in vessel c. For closing seams only d. The code does not permit use of U.T. at all 38. Vessel MAWP for tall verti cal vessel wi ll no rmally b e: a. Greater than vessel part MAWPs b. Lower than Vessel part MAWPs c. May be (a) or (b) depending on Vessel height d. Is always same as vessel design pressure 39. For a a. b. c. d.

vessel con stru cted wit h Type 1 welds: RT3 means E = 1 RT2 means E = 0.85 RT1 and RT2 may mean E = 1 RT4 means spot radiography

40. Choose correct Pneumatic test pressure for following vessel Desig n Pressure = 160 psi Design temp . = 675 ºF Al lo w st res s (A mb ien t) = 20,000 psi Al lo w st res s (675ºF) = 19,200 psi a. 176.0 psig b. 215.6 psig c. 183.3 psig d. None of above 41. Choose corr ect statement. Allow able external press ure for a vessel: a. Will depend on Joint efficiency (E) and extent of radiography b. Depends on vessel temperature c. Is affected by internal corrosion allowance d. Both b and c

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42. The rules for i mpact t esting o f carbo n steel in Section VIII vessel materials require what kind(s) of impact test. a. Brinell & Rockwell b. Izod & Charpy V-notch c. Charpy V-notch only is acceptable d. Brinell only is acceptable 43. Prior to witnessing a pneumatic test of a pressure vessel, the inspector should: a. Ensure that welds around nozzles were inspected by PT or MT prior to commencement of test b. Ensure that test pressure is maintained throughout the leak testing inspection c. Ensure that all butt welds were UT checked prior to commencement of test d. Both a and b 44. Hydrostatic pressure test of vessels may be replaced by pneumatic test: a. At the option of vessel manufacturer b. At the option of vessel inspector c. Permitted only if water is not available in the region and Client approves d. Permitted only if design or operating conditions do not permit use of water as test medium. 45. What will be the minimum inspection p ressure if pneumatic testing was carried out at 220 psi g, as per code? a. 220 psi b. 250 psi c. 200 psi d. 260 psi 46. For external pressure calculations, the value of “ E” is w orked out o n the basis of: a. E = 1 for full radiography b. E = 0.85 for spot radiography c. E = 0.7 for no radiography d. E is modulus of elasticity and does not depend on radiography 47. In external pressure calculations for cylindrical shell, the Factor – A, depends on: a. O.D. and thickness of shell b. Design temperature c. Safe stress value ‘S’ of material d. All of the above

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48. ASME Sec. VIII, Div. 1 permit s wh ich o f the fol low ing no zzle cons truc tion s? a. “Set-in” type b. “Set-on” type c. Both (a) and (b) d. None of (a) or (b) 49. Ovality tol erance of a vessel shell wi th int ernal pressure is: a. 1% for shell I.D. b. 1% for shell O.D. c. 1% of Inside radius of shell d. 1% of Outside radius of shell 50. Reinforcement area required for an op ening of diameter of 8” insi de diameter and minimum required shell wall thickness 1.0” will be: a. 9.0 sq. inches b. 8.0 sq. inches c. 1 inch thickness d. 10 sq. inches 51. A vessel is constructed by using SA516 Gr. 70 normalised plates of thickness 1.125” . Minimum MDMT without any impact testing f or th is vessel will be: a. -26 F b. -30 F c. -22 F d. -16 F ° ° ° °

52. Evaluation of radiographs for “ Porosity” shall be carried out for Pressure vessels subjected to a. Full radiography b. Spot radiography c. For both a and b d. For none of a or b 53. The radiog raphs and radiogr aphy report s of a vessel shall be maintained till : a. 5 years b. Till the MDR is signed c. 3 years d. 10 years 54. Pneumatic test sho uld b e carried out on a vess el at 300 psig. The design temperature and the test temperature are same. What is the test pressure and in how many steps the pressure should be applied. a. 350 psig, 6 steps b. 330 psig, 6 steps c. 350 psig, 2 steps d. 330 psig, 2 steps

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55. A vessel is to undergo a hydrostat ic test after an alteration; th e test pressure wil l be 785 psi. Using standard comm ercially available gauges what is t he minimum and maximum gage pressure range acceptable for this test? a. 0-1000 to 0-3000 psi b. 0-1500 to 0-3000 psi c. 0-1000 to 0-2500 psi d. 0-850 to 0-1500 psi 56. Which shell? a. b. c. d.

is the most severe stress c aused by internal pressure in a cy lindrical

Circumferential stress acting along the longitudinal axis. Longitudinal stress acting along the longitudinal axis Circumferential stress acting along the circumferential axis. Longitudinal stress acting along the circumferential axis.

57. Of th e a. b. c. d.

types of st resses placed on a thin walled cylinder th e most s evere is; Circumferential Longitudinal Compressive Radial

58. The rules for i mpact t esting o f carbo n steel in Section VIII vessel materials require what kind(S) of impact test. a. Brinell & Rockwell b. Izod & charpy V-notch c. Charpy V-notch only is acceptable d. Brinell only is acceptable. 59. You have measured undercut on a girth weld during the repair to a vessel, it was foun d to be 1/32 inch in d epth. The base metal is 2 inch es thick , and you should? a. Reject the weld b. Accept the weld. c. Consult the API 510 code for accept/reject criteria before making a decision d. Consult with the chief inspector or Engineer 60. The two typ es of im pact tests required by sectio n VIII Div.1 are; a. Izod and drop weight b. Brinell and Rockwell c. Charpy and Drop Weigth d. Weld metal and Base metal

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61. In Section VIII Div.1 acceptance o f a radiog raph is based on; a. The speed of the film used. b. The geometric unsharpness of the image c. The absence of backscatter. d. The ability to see the essential hole or wire, if a wire type IQI is used 62. A spot radiograph of a butt weld in a 1 inch thick of a vessel market RT-3 was found to have a rounded indication, the dimension of such an indication according to section VIII div 1 is; a. 1/32 of an inch b. 1/3 of an inch c. 2/3 of an inch d. None, rounded indications are not a consideration with spot radiography 63. Secti on VIII Div 1, is v ery specif ic abou t th e number of spot radiogr aphs required when applying it fo r quality control, the basic premise is to; a. Insure that all welds are made perfectly b. Make sure someone is held responsible for any poor welding c. apply the radiographs immediately after welding in order to take connective steps if needed. d. fire as many welders as possible 64. A P No.1 material that is plate has been rolled into a cylinder and butt welded. The cylinder is exactly 1-1/4” thick, and it is used in the repair of a pressure boundary on a U stamped vessel, the following is a true st atement. a. It must receive full radiography b. It may be not spot radiographed c. It may not be fully radiography d. It may receive spot, full or no radiography depending on the original UI form 65. Charpy imp act tests are intended to pro ve that a material is; a. Tough at the desired MDMT of the vessel to be constructed using that material b. Some what prone to brittle fracture. c. acceptable for use in high temperature service d. not required to be heat treated 66. The testing apparatus used and the techniques f or performin g ch arpy impact tests are found in; a. Section VIII Div. 1 paragraph UG-84 b. SA-270 c. SA-370 d. Section IX paragraph 401.32

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67. Prior t o wi tnessi ng a pneumatic test of pressu re vessel, whic h has been repaired by welding the inspector s hould; a. Determine if the vessel has had all relief devices removed b. Observe that the digital pressure gage to be used for the test is of the proper range c. Check that the personnel conducting the test have been properly trained to perform hazardous tests. d. Make sure that the analog pressure gage is of the proper range for the test pressure 68. The number of charpy imp act speci mens requi red for a 1-3/4” Thick weld procedure test plate is; a. 2 sets of 3. b. 3 sets of 2. c. 3sets of 3. d. Dependent on the type of material to be used in the construction of the vessel.

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ASME SEC VIII QB ANSWERS Q. 1 2 3 4 5 6 7 8

ANS. C D A B D B C A

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

B B C A D D A B D D D C A D D B

UG – 116 e-2 and Table UW - 12 UG – 77 and API 510 ASME VIII, UG – 116 ASME VIII, UG - 116 UG – 99 and UG - 100 UG – 99 (d) ASME VIII, Fig. UCS – 66 ASME VIII, UW – 40 a2 UCS – 56, d1, 5 ASME VIII, UG – 98 (a) ASME VIII, UG - 102 ASME VIII, UG - 100 ASME VIII, UG – 100 Application of UG – 100 (a) UCS – 56, d1, 2, 5 ASME UW-11(a)

25 26 27 28 29 30 31 32 33 34 35 36 37

B D B C D A A B A B C B C

ASME VIII, UW – 3 (a) ASME VIII, UG – 98 (a) ASME VIII, UG – 27 (a), UG -16 (e) ASME VIII, UG – 27 (a) ASME VIII, UW – 3 (a) (1) ASME VIII, UG – 32, d, e, f ASME VIII, Fig. UW - 9 ASME VIII, UW - 35 ASME VIII, UG – 98 (a) ASME VIII, Table UW - 12 ASME VIII, UW – 32 (j) ASME VIII, UW – 12 (d) ASME VIII, UW – 11 (a) - 7

API 510 – DAY 2

REFERENCE ASME VIII, UG – 16 (c) ASME VIII, UG - 99 ASME VIII, UG-80 a (1) ASME VIII, UG-32 (d) API 510, 3.4 ASME VIII, UG-99 (b) and (d) ASME VIII, UG-84 ASME VIII UG-100

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38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

B C C D C A D C D A C A B A A B B B A A C B D D D C D A C D C

API 510 – DAY 2

ASME VIII, 98 (a) ASME VIII, UG – 116 (e) ASME VIII, UG – 100 (b) ASME VIII, UW – II (c) ASME VIII, UG - 84 ASME VIII, UG - 100 ASME VIII, UG – 100 (a) ASME VIII, UG – 100 (d) ASME VIII, UG – 28, Step 7 ASME VIII, UG – 28, Steps 2 and 3 ASME VIII, UW – 16, Fig. UW 16.1 ASME VIII, UG – 80 (a) ASME VIII, UG - 37 ASME VIII, Fig. UCS - 66 ASME VIII, UW-52. ASME VIII, UW – 51 c (1) ASME VIII, UG – 100 (d) UG-102 UG-27&API 510 VIII UG-27 VIII UG-84 VIII UW-35 VIII UG-84 VIII UW-51(a)(3) VIII UW-52 ( c ) (3) VIII UW-52 header note VIII UW-11(a)(3)&UCS-57 (table notes) VIII UG-84 definition of Charpy (notch toughness)! VIII UG-84 refers SA-370 for details VIII UG-100&102&UW-50 VIII UG-84 (h)

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6. Asme Sec Viii Closed Qb (106-120)

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