API 510. Daily Exam-1 (Closed Book)

API 510. Daily Exam-1 (Closed Book)Note: Encircle only one answer which you think is most appropriate.

1. In a 30 mm thick cylindrical shell, the longitudinal as well as circumferential joints are double welded butt welds with full penetration. Which of the following is true as regards the longitudinal and circumferential 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.

2. Vessel MAWP of existing vertical vessel will be affected for which of the 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 coursed. A and C

3. A Shell with Inside dia = 2200 mm, and Corr. allow.= 5 mm is to be designed as per ASME Sec. VIII , Div.1. What will the value of “R” in design formula for shell thickness?

a. 1100 mm b. 1105 mm c. 1095 mm d. 1110 mm

4. In thickness formula for internal pressure for shell, term ‘E’ refers to:

a. Modules of Elasticity of material b. Thermal Expansionc. Joint efficiency of the weldd. None of above

5. The hydrostatic pressure caused by 10 ft. of liquid column (sp. gr. = 1) will be:

a. 10 psi b. 43.3 psi c. 4.33 psi d. None of the above

--------------------------------------------------------------------------------------------------------------------------------------------------------------/tt/file_convert/563db921550346aa9a9a5347/document.doc

4/22/2023 / 8:01:04 AM / NCD

6. A new pressure vessel should be inspected to which of the following codes?

a. API 510 , b. ASME Sec. 1, c. ASME Sec. VIII Div. 1, d. None of these

7. 7. Code rules for testing vessels in service are detailed in:

a. API 510 b. API 570 c. ASME Section VIII Div.1 d. None of above

8. Identify category A joints from following:

a. Longitudinal jointsb. Circumferential joints, shell to shell c. Shell to hemispherical head joint d. a and c above

9. If all other conditions are remains same the design thickness of which dished end (Torispherical, Hemispherical, Ellipsoidal) will be maximum?

a. Torispherical b. Hemispherical c. Ellipsoidal d. All will be same

10. Any thickness-offset within the allowable tolerance shell be provided a minimum taper transition of:

a. 3 to 1 minb. 4 to 1 minc. 3 to 2 mind. 1 to 2 min

11. ASME Sec VIII Div. 1 specifies different acceptance level for weld reinforcement, which of the following statements are true in your opinion?

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


4/22/2023 / 8:01:04 AM / NCD

d. Permitted reinforcement does not depend on location of seems.

12. Vessel MAWP for vertical vessel is measured at:

a. Top most point of vesselb. Bottom most point of vesselc. At the mid point between top & bottomd. None of above

13. Which of the following statements is true?

a. All defects are not discontinuities. b. All discontinuities are defects. c. Discontinuities are rejectable defects. d. Defects are rejectable discontinuities.

14. A Pressure Vessel is designed for 0.85 joint efficiency with full penetration welds. RT requirement will be:

a. Nil b. Spot c. 100 % d. T-joints radiography

15. 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 inchb. 50 inch 3 inch, c. 50 inch, 3¾ inch d. 25 inch, 2 inch

16. If there is a conflict between ASME VIII & API 510 Code, for vessels in-service:

a. ASME will precedentb. API will precedent c. ASNT will precedentd. Owner user will decide

17. Two head to shell joints, one joining 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 --------------------------------------------------------------------------------------------------------------------------------------------------------------

/tt/file_convert/563db921550346aa9a9a5347/document.doc 4/22/2023 / 8:01:04 AM / NCD

b. 1, 1 c. 0.85, 1 d. 0.85, 0.85

18. ASME Sec. VIII Div. 1 recommends use of U.T. in place of R.T. (for a fully radiographed vessel) for:

a. All butt welds in vesselb. All butt and fillet welds in vesselc. For closing seams onlyd. The code does not permit use of U.T. at all

19. Vessel MAWP for tall vertical vessel will normally be:

a. Greater than vessel part MAWPsb. Lower than Vessel part MAWPsc. May be (a) or (b) depending on Vessel heightd. Is always same as vessel design pressure

20. For a vessel constructed with Type 1 welds:

a. RT3 means E = 1b. RT2 means E = 0.85c. RT1 and RT2 may mean E = 1d. RT4 means spot radiography

Q. NO. ANSWER REFERENCE

1 B ASME VIII, UW – 3 (a)2 D ASME VIII, UG – 98 (a)3 B ASME VIII, UG – 27 (a), UG -16 (e)4 C ASME VIII, UG – 27 (a)5 C Body of Knowledge, 3 (a), Page 26 C API 510, 3.27 A API 510, 1.1


4/22/2023 / 8:01:04 AM / NCD

8 D ASME VIII, UW – 3 (a) (1) 9 A ASME VIII, UG – 32, d, e, f 10 A ASME VIII, Fig. UW - 911 B ASME VIII, UW - 3512 A ASME VIII, UG – 98 (a)13 D General Knowledge14 B ASME VIII, Table UW - 1215 C ASME VIII, UG – 32 (j)16 B API 510, 3.217 B ASME VIII, UW – 12 (d)18 C ASME VIII, UW – 11 (a) - 719 B ASME VIII, 98 (a)20 C ASME VIII, UG – 116 (e)21 -----------------2223242526


4/22/2023 / 8:01:04 AM / NCD

Documents

API 510. Daily Exam-1 (Closed Book)