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API 510 FINAL EXAM (Question Bank ) 1. The corrosion corrosion rate is: a. b. c. d.
0.007. 0.07. 0.035. 0.0035. 2. The required minimum thickness is:
a. b. c. d.
0.548. 0.645. 0.610. 0.788. 3. The remaining corrosion allowance is:
a. b. c. d.
.097. .00350. .035. .0097. 4.
a. b. c. d.
5. 2.5. 19.8. 6.9. 5.
a. b. c. d.
The remaining service life in years is:
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.
104 psi. 118 psi. 123 psi. 135 psi. Q. 5 is now deleted from syllabus. It was based on old Body of Knowledge. 6. What What is the the mini minimu mum m hydr hydros osta tati tic c for for a pres pressu sure re vess vessel els s give given n the the following? Shell Shell material material is SA – 240 T 304 S = 10200 10200 psi @ 900 0F 8th Floor, Al-Subeaei Towers, King Abdulaziz cor. Prince Faisal Bin Fahd Streets, Al-Khobar, Saudi Arabia ● TEL (966) 3 887 6633 ● FAX (966) 3 887 6565 ●
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t = 1/2" Corrosion allowance = 0 MDTM = - 50 0F Diameter = 38” OD
a. b. c. d.
S = 18800 psi @ 100 0F Design temperature = 900 0F Category “A” type 1 welded joint, RT – 1 Not for lethal service
271.2. 499.8. 406.8. 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.
a. b. c. d.
An individual using the automatic SAW. process may be qualified by radiography on production weld. How much of the weld must be radio graphed?
6”. 12”. 3”. 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 MAWP = 250 psi ID = 24” Stress = 17, 500 psi 2:1 seamless Ellipsoidal heads.
Head and shell material = SA – 516 -70 Temperature: 400 0F Type 1 welds Shell height = 24 feet
8. What is the minimum material thickness you can use for the bottom shell course?
a. b. c. d.
0.2587”. 0.2479”. 0.2126”. 0.1988”. 9. What is the minimum material thickness you can use for the upper head?
a.
b. c. d.
0.2020”. 0.2104”. 0.3141”. 0.2288”. 8th Floor, Al-Subeaei Towers, King Abdulaziz cor. Prince Faisal Bin Fahd Streets, Al-Khobar, Saudi Arabia ● TEL (966) 3 887 6633 ● FAX (966) 3 887 6565 ●
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10.
a. b. c. d.
What is the minimum material thickness you can use for the lower head?
0.2020”. 0.2104”. 0.3141”. 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?
a. b. c. d.
455 psi. 546 psi. 375 psi. 313 psi. 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. c. d.
10 degress above MDMT. 30 degress above MDMT. 30 degress above zero. 13.
a. b. c. d.
What is the first test pressure reading of the vessel gage when pneumatically tested?
313 psi. 227 psi. 187 psi. 273 psi.
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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? a. b.
c. d.
344 psi. 412 psi. 225 psi. 318 psi.
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