API 570 PRACTICE TEST QUESTIONS
WITH 100% CORRECT ANSWERS
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
Thickness measurements are suggested at pipefittings since: - Answer-directional
changes generally create increased turbulence.
Flange leaks in certain fluids can cause: - Answer-bolts to crack and corrode
Heat Tracing could cause cracking in carbon steel piping which is in: - Answer-Caustic
service
Excessive repairs to pump bearings may be a result of: - Answer-excessive forces
coming from thermal growth in the attached piping system
Loose or broken anchor bolts at pipe supports are most easily detected by: - Answer-
hammer testing
A pneumatic pressure test is to be conducted on a Normal Service piping system.
During pipe erection, how many of the joint assemblies should be examined? - Answer-
100 %
During a pipe repair, preheat is substituted for the required PWHT. What is the
minimum preheat temperature. - Answer-300 F
In severe refinery services which type of pipe is normally used? - Answer-seamless
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are
highest on which weld orientation? - Answer-longitudinal weld
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal
service. - Answer-10%
for welded pipe, the normal thickness of under-tolerance is? - Answer-.010 or 10 mils
WITH 100% CORRECT ANSWERS
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
Thickness measurements are suggested at pipefittings since: - Answer-directional
changes generally create increased turbulence.
Flange leaks in certain fluids can cause: - Answer-bolts to crack and corrode
Heat Tracing could cause cracking in carbon steel piping which is in: - Answer-Caustic
service
Excessive repairs to pump bearings may be a result of: - Answer-excessive forces
coming from thermal growth in the attached piping system
Loose or broken anchor bolts at pipe supports are most easily detected by: - Answer-
hammer testing
A pneumatic pressure test is to be conducted on a Normal Service piping system.
During pipe erection, how many of the joint assemblies should be examined? - Answer-
100 %
During a pipe repair, preheat is substituted for the required PWHT. What is the
minimum preheat temperature. - Answer-300 F
In severe refinery services which type of pipe is normally used? - Answer-seamless
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are
highest on which weld orientation? - Answer-longitudinal weld
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal
service. - Answer-10%
for welded pipe, the normal thickness of under-tolerance is? - Answer-.010 or 10 mils
