API 653 Question Bank (API 653 QB001)

31. In a radiographic film of a weld, how is back scatter checked? 

(a)  By use of a penetrameter

(b)  By film density

(c)  Using lead letter “B”  

(d)  All of the above

32. In general, if shell thickness does not exceed ____ inch, it does not require further assessment for brittle fracture:

(a) 0.25

(b) 0.75

(c) 1.00

(d) 0.50

33. Potential for brittle fracture exists for tanks constructed according to:

(a)  API 650 – 7th edition

(b)  API 650 – latest edition

(c)  API 650 – 4th edition

(d)  None of the above

34. Three types of external inspections are:

(a)  Scheduled, routine and liquid penetrant

(b)  Scheduled, routine and UT thickness

(c)  Scheduled out of service, routine and UT thickness

(d)  Unscheduled, routine and liquid penetrant

35. Welders qualifications shall expire as they do not weld: 

(a)  Within a given process for a 6 month period

(b)  Using a given procedure for a 6 month period;

(c)  On a tank for 6 months;

(d)  For a 3 month period.

36. What are penetrameters used for:

(a)  A penetrameter is used for radiographic technique in that it serves as an image quality indicator

(b)  It indicates the magnetic properties of the materials

(c)  To check penetrant quality in PT inspection

(d)  To check weld penetration during welding

37. Unless otherwise agreed to by the purchaser, what is the minimum nominal width of a shell plate?

(a) 36 inches

(b) 48 inches

(c) 72 inches

(d) 96 inches

38. “Each vertical weld must be radiographed (either spot or full radiography) for the bottom shell course (i.e., course no. 1) for all tanks constructed to current API 650 Basic Standard.” This statement is:

a. False

b. True

c. Whether any radiography is required or not depends on shell thickness.

d. Depends on tank design Engineer’s opinion

39. According to ASME Sec. IX, welding filler metals are grouped into groupings (based on their usability) as:

(a) P-numbers

(b) F-numbers

(c) Z-numbers

(d) ASTM spec.

40. When reviewing a radiograph, a light image of the letter B can be seen on the film with dark background.

(a)  This is cause for rejection

(b)  This is not cause for rejection

(c)  This is the same as a light letter B

(d)  An unusual safety hazard existed during the exposure

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