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API 570 PRACTICE TEST QUESTIONS AND ANSWERS
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API 570 PRACTICE TEST QUESTIONS AND ANSWERS
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API 570 PRACTICE TEST QUESTIONS AND ANSWERSIn severe refinery services which type of pipe is normally used? - Answers -seamless
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are
highest on which weld orientation? - Answers -longitudinal weld
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal
service. - Answers -10%
for welded pipe, the normal thickness of under-tolerance is? - Answers -.010 or 10 mils
when qualifying a weld procedure the esential variables must: - Answers -be recorded
on both the WPS & PQR
a pipe has a thickness designation of "40S". what does the "S" mean? - Answers -
stainless steel
Who has the responsibility to determine the extent of PMI performed? - Answers -
owner/user
An inservice process pipe should be classified as Class 1 when the % of H2S exceeds:
- Answers -3%
A welder becomes unqualified when he has not welded using the: - Answers -Process
for 6 months
A PQR test coupon with a shell thickness of "T" can generally be used to qualify a wall
thickness on the WPS up to. - Answers -2T
A pressure test is always required: - Answers -whenever the authorized inspector
believes one is necessary
When can radiography not be used to qualify a welder? - Answers -when using the
GMAW process with the short circuit mode
Generally, raised face flanges should have a surface finish of: - Answers -125-250
micro- inches
During a direct visual exam of a pipe weld, the minimum light intensity should be: -
Answers -100 footcandles
Describe the 3G welding test position. - Answers -Vertical groove
Seal welding pipe threads: - Answers -may be used to prevent leaks
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