API 510. Daily Exam-3 (Closed Book)

API 510. DAILY EXAM 3 (Closed book)

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

1. Choose correct Pneumatic test pressure for following vessel

Design Pressure = 160 psiDesign temp. = 675 ºFAllow stress (Ambient) = 20,000 psiAllow stress (675ºF) = 19,200 psi

a. 176.0 psig b. 215.6 psigc. 183.3 psigd. None of above

2. Part MAWP for lower dished head in vertical vessel will generally be:

a. Lower than top head b. Lower than shellc. Higher than both shell and top headd. Same as both top head and shell

3. Choose correct statement. Allowable external pressure for a vessel:

a. Will depend on Joint efficiency (E) and extent of radiography

b. Depends on vessel temperaturec. Is affected by internal corrosion allowanced. Both b and c

4. The rules for impact testing of carbon 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 acceptabled. Brinell only is acceptable

5. 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

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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

6. Vessel MAWP is 200 psi. What will be the total pressure at a point 20 feet from top, if vessel is completely filled with liquid (specific gravity = 1).

a. 220.00 psi b. 208.66 psic. 204.33 psi d. 191.34 psi

7. Hydrostatic pressure test of vessels may be replaced by pneumatic test:

a. At the option of vessel manufacturerb. At the option of vessel inspectorc. Permitted only if water is not available in the

region and Client approvesd. Permitted only if design or operating conditions do

not permit use of water as test medium.

8. What will be the minimum inspection pressure if pneumatic testing was carried out at 220 psig, as per code?

a. 220 psi b. 250 psi c. 200 psi d. 260 psi

9. For external pressure calculations, the value of “E” is worked out on the basis of:

a. E = 1 for full radiographyb. E = 0.85 for spot radiographyc. E = 0.7 for no radiographyd. E is modulus of elasticity and does not depend

on radiography

10. In external pressure calculations for cylindrical shell, the Factor – A, depends on:

a. O.D. and thickness of shellb. Design temperaturec. Safe stress value ‘S’ of material


d. All of the above

11. The size of a properly deposited equal fillet weld is shown as 10 mm. The throat dimension for this weld will be approximately:

a. 10 mm b. 8 mm c. 7 mm d. 9 mm

12. ASME Sec. VIII, Div. 1 permits which of the following nozzle constructions?

a. “Set-in” typeb. “Set-on” typec. Both (a) and (b)d. None of (a) or (b)

13. Ovality tolerance of a vessel shell with internal pressure is:

a. 1% for shell I.D.b. 1% for shell O.D.c. 1% of Inside radius of shelld. 1% of Outside radius of shell

14. The notch test is better described as:

a. Plastic formation and fractureb. Brittle failurec. Energy observed at the notchd. toughness

15. Reinforcement area required for an opening of diameter of 8” inside diameter and minimum required shell wall thickness 1.0” will be:

a. 9.0 sq. inchesb. 8.0 sq. inchesc. 1 inch thicknessd. 10 sq. inches

16. The material not requiring PWHT by code requirement has been heat-treated. The PWHT carried out on this material is most likely due to:

a. Due to process requirementb. Because of the materialc. As per authorized inspector requirement


d. Because of welding process.

17. A vessel is constructed by using SA516 Gr. 70 normalised plates of thickness 1.125”. Minimum MDMT without any impact testing for this vessel will be:

a. -26F b. -30F c. -22F d. -16F

18. Evaluation of radiographs for “Porosity” shall be carried out for

Pressure vessels subjected to

a. Full radiographyb. Spot radiographyc. For both a and bd. For none of a or b

19. The radiographs and radiography reports of a vessel shall be maintained till:

a. 5 years b. Till the MDR is signedc. 3 years d. 10 years

20. Pneumatic test should be carried out on a vessel 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 stepsb. 330 psig, 6 stepsc. 350 psig, 2 stepsd. 330 psig, 2 steps

21. Non-ferrous material has iron content:a. Less than 20% b. Less than 10% c. Less than 100% d. Less than 50%

Q. NO. ANSWER REFERENCE


1 C ASME VIII, UG – 100 (b)2 C Body of Knowledge, 3 (d), page 23 D ASME VIII, UW – II (c)4 C ASME VIII, UG - 845 A ASME VIII, UG - 1006 B Body of Knowledge, 3 (d), page 27 D ASME VIII, UG – 100 (a)8 C ASME VIII, UG – 100 (d)9 D ASME VIII, UG – 28, Step 710 A ASME VIII, UG – 28, Steps 2 and 311 C Body of Knowledge12 C ASME VIII, UW – 16, Fig. UW 16.113 A ASME VIII, UG – 80 (a)14 D General Knowledge15 B ASME VIII, UG - 3716 A General Knowledge17 A ASME VIII, Fig. UCS - 6618 A ASME VIII, UW-52.19 B ASME VIII, UW – 51 c (1)20 B ASME VIII, UG – 100 (d)21 D


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API 510. Daily Exam-3 (Closed Book)