API 570 TEST PAPER QUESTIONS AND SOLUTIONS GRADED A A+
⫸ Who has the responsibility to determine the extent of PMI
(Positive Material Identification) performed? Answer: The owner/user
⫸ An inservice process pipe should be classified as Class 1 when the
% of H2S exceeds: Answer: 3%
⫸ A welder becomes unqualified when he has not welded in: Answer:
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. Answer: 2T
⫸ A pressure test is always required: Answer: whenever the
authorized inspector believes one is necessary
⫸ When can radiography not be used to qualify a welder? Answer:
when using the GMAW process with the short circuit mode
⫸ Generally, raised face flanges should have a surface finish of:
Answer: 125-250 micro- inches
,⫸ During a direct visual exam of a pipe weld, the minimum light
intensity should be: Answer: 100 footcandles
⫸ Describe the 3G welding test position. Answer: Vertical groove
Weld
⫸ Seal welding pipe threads: Answer: may be used to prevent leaks
⫸ Liquid thermal relief valves should be set at a pressure not higher
than: Answer: 120 %
⫸ When fabricating pipe, unknown materials: Answer: Should never
be used (except for door stops)
⫸ The material verification program specified by API 578 covers:
Answer: only pressure containing components.
⫸ what is the interval for thickness measurements on a class 1 piping
system? Answer: lesser of 5 years or half life of the pipe
⫸ According to B31.3, a welder's qualification records from a
previous employer can: Answer: Be accepted if the inspector approves
⫸ When welding together piping components of different
thicknesses, the thicker part should be trimmed with a: Answer: 30
degree taper.
, ⫸ When performing soil-to air inspections on uncoated lines, it is
recommended to excavate the soil: Answer: 6-12 inches.
⫸ When performing preheat prior to welding or PWHT, the preheat
zone and/or PWHT must extend how far beyond the edge of the weld?
Answer: 1 inch
⫸ Flange bolts are unacceptable if the bolt threads do not extend:
Answer: inside the nut within 1 thread of the nut face
⫸ Carbon steel materials are most likely to be incorrectly substituted
in: Answer: a chrome steel piping system.
⫸ Per B31.3 how much of the fabrication should be visually
examined for a pipe in severe cyclic service: Answer: 100 %
⫸ When calibrating a UT instrument, that has a delay line with single
element unit, use: Answer: At least 2 test blocks with thicknesses near
the max and min to be examined.
⫸ During pipe repairs, which welding discontinuity is always
unacceptable? Answer: Cracks and Inadequate fusion
⫸ What do you call a groove in the parent metal at the toe of a weld?
Answer: undercut
⫸ Who has the responsibility to determine the extent of PMI
(Positive Material Identification) performed? Answer: The owner/user
⫸ An inservice process pipe should be classified as Class 1 when the
% of H2S exceeds: Answer: 3%
⫸ A welder becomes unqualified when he has not welded in: Answer:
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. Answer: 2T
⫸ A pressure test is always required: Answer: whenever the
authorized inspector believes one is necessary
⫸ When can radiography not be used to qualify a welder? Answer:
when using the GMAW process with the short circuit mode
⫸ Generally, raised face flanges should have a surface finish of:
Answer: 125-250 micro- inches
,⫸ During a direct visual exam of a pipe weld, the minimum light
intensity should be: Answer: 100 footcandles
⫸ Describe the 3G welding test position. Answer: Vertical groove
Weld
⫸ Seal welding pipe threads: Answer: may be used to prevent leaks
⫸ Liquid thermal relief valves should be set at a pressure not higher
than: Answer: 120 %
⫸ When fabricating pipe, unknown materials: Answer: Should never
be used (except for door stops)
⫸ The material verification program specified by API 578 covers:
Answer: only pressure containing components.
⫸ what is the interval for thickness measurements on a class 1 piping
system? Answer: lesser of 5 years or half life of the pipe
⫸ According to B31.3, a welder's qualification records from a
previous employer can: Answer: Be accepted if the inspector approves
⫸ When welding together piping components of different
thicknesses, the thicker part should be trimmed with a: Answer: 30
degree taper.
, ⫸ When performing soil-to air inspections on uncoated lines, it is
recommended to excavate the soil: Answer: 6-12 inches.
⫸ When performing preheat prior to welding or PWHT, the preheat
zone and/or PWHT must extend how far beyond the edge of the weld?
Answer: 1 inch
⫸ Flange bolts are unacceptable if the bolt threads do not extend:
Answer: inside the nut within 1 thread of the nut face
⫸ Carbon steel materials are most likely to be incorrectly substituted
in: Answer: a chrome steel piping system.
⫸ Per B31.3 how much of the fabrication should be visually
examined for a pipe in severe cyclic service: Answer: 100 %
⫸ When calibrating a UT instrument, that has a delay line with single
element unit, use: Answer: At least 2 test blocks with thicknesses near
the max and min to be examined.
⫸ During pipe repairs, which welding discontinuity is always
unacceptable? Answer: Cracks and Inadequate fusion
⫸ What do you call a groove in the parent metal at the toe of a weld?
Answer: undercut
