API 570 practice test UPDATED ACTUAL
Questions and CORRECT Answers
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
Questions and CORRECT Answers
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
