API 653 Question Bank (API 653 QB002)

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

a. Cracks

b. Incomplete penetration 

c. Laminations

d. Slag

12. The reason for periodical inspection of ASTs is to:

a. Determine their physical condition

b. Determine the rate of deterioration

c. Maintain safe operating conditions 

d. All of the above

13. Resistance of grounding connection shall not be,

a. more than 25 Ohms

b. less than 1 Meg-Ohm

c. less than 25 Ohms

d. more than 5 Ohms

14. Internal inspection is primarily to:

a. 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:

a. Full radiography over entire repaired length of weld

b. 1 spot on repair portion for each vertical weld

c. 1 spot on each 50’ for horizontal weld

d. “b” and “c”

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

a. ASME

b. API 651

c. API 652

d. API 650

17. The complete or partial removal and replacement of more than 12 inches of a vertical weld joining shell plates is considered a:

a. minor alteration

b. minor repair

c. major alteration

d. major repair

18. The difference between peaking and banding is:

a. peaking pertains to the roof;

b. banding is external to the tank;

c. peaking pertains to vertical weld seams, banding pertains to horizontal weld seams;

d. peaking pertains to horizontal weld seams, banding pertains to vertical weld seams.

19. The minimum interval for external inspection by a qualified inspector is ____ years or at the quarter corrosion-rate life of the shell, whichever is less:

a. Twenty

b. Five

c. Ten

d. Fifteen

20. The minimum retirement thickness of an annular plate ring is usually greater than:

a. 0.10 inch

b. 0.25 inch

c. 0.0625 inch

d. 0.1875 inch

end of API 653 QB002

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