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API 570 EXAM (FULL) QUESTIONS AND ANSWERS
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API 570 EXAM (FULL) QUESTIONS AND ANSWERS
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API 570 EXAM (FULL) QUESTIONS AND ANSWERSPressure 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
The corrosiveness of soils can be determined by measuring the soils: - Answers -
Resistivity
when qualifying a weld procedure the essential variables must: - Answers -be recorded
on both the WPS & PQR
In severe refinery services which type of pipe is normally used? - Answers -seamless
pipe
a pipe has a thickness designation of "40S". what does the "S" mean? - Answers -
Stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above: - Answers -2
inches
A propane piping system should be classified as? - Answers -Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for: -
Answers -Blind flanges
Preheat should never be substituted for PWHT if: - Answers -the PWHT was used to
prevent environmental cracking.
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 Weld
, Seal welding pipe threads: - Answers -may be used to prevent leaks
Liquid thermal relief valves should be set at a pressure not higher than: - Answers -120
%
When fabricating pipe, unknown materials: - Answers -Should never be used (except for
door stops)
The material verification program specified by API 578 covers: - Answers -only pressure
containing components.
what is the interval for thickness measurements on a class 1 piping system? - Answers -
lesser of 5 years or half life of the pipe
According to B31.3, a welder's qualification records from a previous employer can: -
Answers -Be accepted if the inspector approves
When welding together piping components of different thicknesses, the thicker part
should be trimmed with a: - Answers -30 degree taper.
When performing soil-to air inspections on uncoated lines, it is recommended to
excavate the soil: - Answers -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? - Answers -1 inch
Flange bolts are unacceptable if the bolt threads do not extend: - Answers -inside the
nut within 1 thread of the nut face
Carbon steel materials are most likely to be incorrectly substituted in: - Answers -a
chrome steel piping system.
Per B31.3 how much of the fabrication should be visually examined for a pipe in severe
cyclic service: - Answers -100 %
When calibrating a UT instrument, that has a delay line with single element unit, use: -
Answers -At least 2 test blocks with thicknesses near the max and min to be examined.
During pipe repairs, which welding discontinuity is always unacceptable? - Answers -
Cracks and Inadequate fusion
What do you call a groove in the parent metal at the toe of a weld? - Answers -undercut
The RT procedure used for a pipe repair must conform to the requirements of: -
Answers -ASME Section 5
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