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

Read more »

API 653 Question Bank (API 653 QB002)

Hie! friends,

Today we posted here second question bank for API 653 Tank Inspector Exam. You shall follow the same method to save this question bank, which is said in earlier posts. Please post your valuable comments for each and every post. It will boost up our interest and helpful to provide more & more question banks. The second question bank starts below:

1. A hydrostatic test for a relocated tank:

a. May be waived by the Owner/Operator

b. Is required

c. May be waived by the Inspector

d. Is not necessary

2. Minimum thickness of tank bottom in critical zone shall be at least 0.1 inch but also it shall be:

a. Greater of: ½ tmin for lowest shell course and half of original thickness in critical zone

b. Smaller of: ½ tmin for lowest shell course and half of original thickness in critical zone

c. 0.1” only

d. 0.05” as from Table 6-1, if leak detection system is provided

3. During the hydrostatic test, no less than _______ settlement measurement points shall be surveyed.

a. 8

b. 10

c. 15

d. 5

4. For vacuum box test, a partial vacuum of at least _______ shall be used using _________ to check the cracks.

a. 3 psi, penetrating oil

b. 5 psi, water immersion

c. 3 psi, film solution

d. 5 psi, liquid penetrant

5. Which tests are usually conducted to verify acceptability of shell to bottom plate welds?

a. Penetrating oil

b. RT

c. Vacuum box test

d. “a” and “c”

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

a Dye penetrant tested

b. Leak tested

c. Hammer tested

d. Magnetic particle tested

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

a. Size of the hot tap nozzle holes

b. Thickness of the plate at the hot tap

c. Height of the hot tap from the tank bottom

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 installed on the roof

b. 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 laboratory test have shown that a membrane stress in tank shell plates of at least _______ is required to cause failure due to brittle fracture?

a. 500 psi

b. 100 Mpa

c. 7 ksi

d. 18 kg/mm2 

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

a. it can detect surface discontinuities with foreign material imbedded in them

b. It is faster on individual parts

c. It can detect near-surface discontinuities

d. All of the above

Read more »

Answer Sheet for API 653 QB001

Question #	Answer	Question #	Answer
1	D	26	B
2	C	27	C
3	B	28	B
4	B	29	C
5	B	30	C
6	A	31	C
7	D	32	D
8	B	33	C
9	A	34	B
10	D	35	A
11	B	36	A
12	B	37	C
13	A	38	B
14	A	39	B
15	B	40	A
16	C	41	A
17	C	42	D
18	D	43	B
19	B	44	B
20	D	45	B
21	B	46	C
22	D	47	D
23	C	48	B
24	C	49	D
25	C	50	B

Read more »