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

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