API_510_Final_Exam_Question_Bank[1]

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API 510 FINAL EXAM (Question Bank)

1. The corrosion rate is:

a. 0.007.b. 0.07.c. 0.035.d. 0.0035.

2. The required minimum thickness is:

a. 0.548.b. 0.645.c. 0.610.d. 0.788.

3. The remaining corrosion allowance is:

a. .097.b. .00350.c. .035.d. .0097.

4. The remaining service life in years is:

a. 5.b. 2.5.c. 19.8.d. 6.9.

5. A forge cylindrical vessel having an outside diameter of 16 inches was measured to have an actual shell thickness of 0.312” Both ends of the circular forged flat head is (1/2) inch. Using fig. UG-34 (b-1), what is the maximum allowable pressure for both heads? S = 17,500 ps.

a. 104 psi.b. 118 psi.c. 123 psi.d. 135 psi.

Q. 5 is now deleted from syllabus. It was based on old Body of Knowledge.

6. What is the minimum hydrostatic for a pressure vessels given the following?Shell material is SA – 240 T 304 S = 10200 psi @ 900 0Ft = 1/2" S = 18800 psi @ 100 0FCorrosion allowance = 0 Design temperature = 900 0F

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MDTM = - 50 0F Category “A” type 1 welded joint, RT – 1Diameter = 38” OD Not for lethal service

a. 271.2.b. 499.8.c. 406.8.d. 749.7.

Correct answer =633.1 psi.( First calculate MAWP. It is 264.24 psi. then calculate test pr.options above were based on old edition of ASME )

7. An individual using the automatic SAW. process may be qualified by radiography on production weld. How much of the weld must be radio graphed?

a. 6”.b. 12”.c. 3”.d. 3’.

Question 8 thru 10. comes from these following sets of conditions:You are designing a vessel to contain water, with multiple course vertical vessel using rolled and welded plates without RT on all joints. The design parameters are:

Service – Water Tank Head and shell material = SA – 516 -70MAWP = 250 psi Temperature: 400 0FID = 24” Type 1 weldsStress = 17, 500 psi Shell height = 24 feet2:1 seamless Ellipsoidal heads.

8. What is the minimum material thickness you can use for the bottom shell course?

a. 0.2587”.b. 0.2479”.c. 0.2126”.d. 0.1988”.

9. What is the minimum material thickness you can use for the upper head?

a. 0.2020”.b. 0.2104”.c. 0.3141”.d. 0.2288”.

10. What is the minimum material thickness you can use for the lower head?

a. 0.2020”.



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b. 0.2104”.c. 0.3141”.d. 0.2288”.

Question 11 – 14 are from this set of conditions.

A 250 psi vessel 100 ft tall is to be pneumatic tested in accordance with the original ASME Section VIII Div. 1 rules. The material is SA – 516 – 70 and has a design stress of 12,000 psi and a stress of 17,500 psi at ambient test temperature.

11. What is the pneumatic test pressure required?


Correct answer = 401 psi.( options above were based on old edition of ASME )

12. What is the minimum temperature at which a fabricated vessel can be tested?

a. 10 degress above operating temperature.b. 10 degress above MDMT.c. 30 degress above MDMT.d. 30 degress above zero.

13. What is the first test pressure reading of the vessel gage when pneumatically tested?


Correct answer =200.5 psi.( options above were based on old edition of ASME )

14. What is the pressure reading on the gage after the THIRD step in testing the vessel?



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API_510_Final_Exam_Question_Bank[1]