Question Number Answer
1 C
2 B
3 A
4 D
5 C
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Section 2 – Materials
1. API-650 lists materials to be used in the construction of tanks covered by the standard. Is it permissible to use materials other than those listed in the standard?
a) No only materials listed in API-650 may be used in tank fabrication b) Yes as long as the manufacturer accepts full liability for tank failure
c) Yes providing it is certified as meeting all requirements of a material listed in API-650 and is approved by the API-653 Inspector
d) Yes providing it is certified as meeting all the requirements of a material listed in API-650 and is approved by the purchaser
Reference: API-650, Paragraph 2.1.1
2. If a new or unused plate cannot be completely identified, may it still be used in the construction of tanks within the scope of API-650?
a) Yes only if the material passes the tests prescribed in Appendix S b) Yes only if the material passes the tests prescribed in Appendix N c) Yes only if the material passes the tests prescribed in ASME Section V
d) Yes only if the material passes the tests prescribed in ASME Section VIII, Div. 2 Reference: API-650, Paragraph 2.1.2
3. What is the maximum permitted underrun for shell, roof, and bottom plates?
a) 0.10 inch from the computed design thickness or minimum permitted thickness b) 0.01 inch from the computed design thickness or minimum permitted thickness c) 0.001 inch from the computed design thickness or minimum permitted thickness d) 0.02 inch from the computed design thickness or minimum permitted thickness Reference: API-650, Paragraph 2.2.1.2.3
4. Shell plates are limited to what maximum thickness?
a) Shell plates are limited to a maximum thickness of 1.250 inches b) Shell plates are limited to a maximum thickness of 1.875 inches c) Shell plates are limited to a maximum thickness of 1.750 inches d) Shell plates are limited to a maximum thickness of 1.075 inches Reference: API-650, Paragraph 2.2.1.4
5. Which of the following is not a requirement for shell plates that are thicker than 1.5 inches?
a) Plates thicker than 1.5 inches shall be free of mill scale and painted b) Plates thicker than 1.5 inches shall be made to fine-grain practice c) Plates thicker than 1.5 inches shall be impact tested
d) Plates thicker than 1.5 inches shall be normalized or quench tempered Reference: API-650, Paragraph 2.2.1.4
6. What is the maximum shell plate thickness permitted for a tank fabricated of ASTM A 36 material?
a) This plate material is limited to 1.750 inches b) This plate material is limited to 1.075 inches c) This plate material is limited to 1.050 inches d) This plate material is limited to 1.500 inches Reference: API-650, Paragraph 2.2.2 a
7. What is the maximum shell plate thickness permitted for a tank fabricated of ASTM A 285, Grade C material?
a) This plate material is limited to 1.000 inches b) This plate material is limited to 1.250 inches c) This plate material is limited to 1.500 inches d) This plate material is limited to 1.750 inches Reference: API-650, Paragraph 2.2.2 d
8. All welding to repair surface defects shall be done with ______.
a) Cellulose coated electrode b) High nickel content electrode c) Low-hydrogen electrode d) Gas tungsten process Reference: API-650, Paragraph 2.2.6.2
9. When conducting impact tests, how many specimens are required from a single test coupon?
a) Impact tests shall be performed on a single specimen taken from a single test coupon
b) Impact tests shall be performed on two specimens taken from a single test coupon c) Impact tests shall be performed on three specimens taken from a single test
coupon
d) Impact tests shall be performed on four specimens taken from a single test coupon Reference: API-650, Paragraph 2.2.8.3
10. In situations where it is not possible to obtain full size specimens, what is the required width along the notch for subsize specimens?
a) 60% of the material thickness b) 80% of the material thickness c) 90% of the material thickness d) 75% of the material thickness Reference: API-650, Paragraph 2.2.8.5
11. Unless data is available to justify a different temperature, what must the design metal temperature be for an aboveground storage tank to be installed in Birmingham, Alabama?
a) The design temperature shall be assumed to be 25°F b) The design temperature shall be assumed to be 15°F c) The design temperature shall be assumed to be 20°F d) The design temperature shall be assumed to be 10°F
Reference: API-650, Paragraph 2.2.9.3 and Figure 2-2
12. Unless data is available to justify a different temperature, what must the design metal temperature be for an aboveground storage tank to be installed in Indianapolis, Indiana?
a) The design temperature shall be assumed to be 5°F b) The design temperature shall be assumed to be -5°F c) The design temperature shall be assumed to be 0°F d) The design temperature shall be assumed to be 10°F
Reference: API-650, Paragraph 2.2.9.3 and Figure 2-2
13. What is the required average longitudinal impact value of three specimens taken from a 1.375 inch thick A 516M-60(415) normalized Group IIIA test coupon?
a) 30 foot-pounds b) 20 foot-pounds c) 15 foot-pounds d) 13 foot-pounds
Reference: API-650, Paragraph 2.2.10.2 and Figures 2-3 and 2-4
14. What is the required average longitudinal impact value of three specimens taken from a 1.5 inch thick A 516M-70(485) as rolled Group V test coupon?
a) 35 foot-pounds b) 25 foot-pounds c) 20 foot-pounds d) 30 foot-pounds
Reference: API-650, Paragraph 2.2.10.2 and Figures 2-3 and 2-4
15. Longitudinal impact tests are performed on three specimens, taken from a 1.5 inch thick A 516M-70(485) as rolled test coupon with the following results: Specimen #1 – 42 foot-pounds, Specimen #2 – 18 foot-foot-pounds, Specimen # 3 – 31 foot-pounds. Is the impact test acceptable?
a) Yes the average impact value exceeds 30 foot-pounds
b) Yes only one specimen is less than 2/3 the specified minimum value
c) No the average impact value of Specimen # 1 exceeds 2/3 the required average impact value and one specimen is less than 2/3 the specified minimum value d) No Specimen #2 is less than 2/3 the specified minimum
Reference: API-650, Paragraph 2.2.8.3 and Figures 2-3 and 2-4