API 570 practice test Questions With Quality Solutions
2024/25
In severe refinery services which type of pipe is normally used? - Correct Answer seamless
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are highest on which weld
orientation? - Correct Answer longitudinal weld
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal service. - Correct
Answer 10%
for welded pipe, the normal thickness of under-tolerance is? - Correct Answer .010 or 10 mils
when qualifying a weld procedure the esential variables must: - Correct Answer be recorded on both
the WPS & PQR
a pipe has a thickness designation of "40S". what does the "S" mean? - Correct Answer stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above: - Correct Answer 2 inches
A propane piping system should be classified as? - Correct Answer Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for: - Correct Answer Blind
flanges
The corrosiveness of soils can be determined by measuring the soils: - Correct Answer Resistivity
Preheat should never be substituted for PWHT if: - Correct Answer The PWHT was designed to prevent
environmental cracking
, During welding, non-esential variables: - Correct Answer Must be recorded only on the WPS and must
be followed by the welder.
During a hydrotest, all joints should be: - Correct Answer left uninsulated
ASME/ANSI B16.5 requires flanges to be: - Correct Answer marked with the class rating.
Graphitization of carbon steels begins to occur when metal temperatures exceed: - Correct Answer 800
F
During pipe fabrication who has overall responsibility for compliance with the code? - Correct Answer
owner/user
Who has the responsibility to determine the extent of PMI performed? - Correct Answer owner/user
An inservice process pipe should be classified as Class 1 when the % of H2S exceeds: - Correct Answer
3%
A welder becomes unqualified when he has not welded using the: - Correct Answer 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. - Correct Answer 2T
A pressure test is always required: - Correct Answer whenever the authorized inspector believes one is
necessary
When can radiography not be used to qualify a welder? - Correct Answer when using the GMAW
process with the short circuit mode
Generally, raised face flanges should have a surface finish of: - Correct Answer 125-250 micro- inches
2024/25
In severe refinery services which type of pipe is normally used? - Correct Answer seamless
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are highest on which weld
orientation? - Correct Answer longitudinal weld
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal service. - Correct
Answer 10%
for welded pipe, the normal thickness of under-tolerance is? - Correct Answer .010 or 10 mils
when qualifying a weld procedure the esential variables must: - Correct Answer be recorded on both
the WPS & PQR
a pipe has a thickness designation of "40S". what does the "S" mean? - Correct Answer stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above: - Correct Answer 2 inches
A propane piping system should be classified as? - Correct Answer Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for: - Correct Answer Blind
flanges
The corrosiveness of soils can be determined by measuring the soils: - Correct Answer Resistivity
Preheat should never be substituted for PWHT if: - Correct Answer The PWHT was designed to prevent
environmental cracking
, During welding, non-esential variables: - Correct Answer Must be recorded only on the WPS and must
be followed by the welder.
During a hydrotest, all joints should be: - Correct Answer left uninsulated
ASME/ANSI B16.5 requires flanges to be: - Correct Answer marked with the class rating.
Graphitization of carbon steels begins to occur when metal temperatures exceed: - Correct Answer 800
F
During pipe fabrication who has overall responsibility for compliance with the code? - Correct Answer
owner/user
Who has the responsibility to determine the extent of PMI performed? - Correct Answer owner/user
An inservice process pipe should be classified as Class 1 when the % of H2S exceeds: - Correct Answer
3%
A welder becomes unqualified when he has not welded using the: - Correct Answer 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. - Correct Answer 2T
A pressure test is always required: - Correct Answer whenever the authorized inspector believes one is
necessary
When can radiography not be used to qualify a welder? - Correct Answer when using the GMAW
process with the short circuit mode
Generally, raised face flanges should have a surface finish of: - Correct Answer 125-250 micro- inches
