API 570 Open Book Exam Questions
with Complete Solutions9
1- A hydrotest is being conducted on an underground line as a substitute for the external
inspection. The test pressure is 200 psig. At the end of the test, the pressure must be at least: -
ANSWERS-C.190 psig
2- Determine the maximum allowed pressure for a class 300 flange that has a design
temperature of 950 degrees F. The flange material is ASTM A217 gr.C12 - ANSWERS-B. 375 psig
3- An 8 NPS pipe is being replaced with A106 gr. B material. The pipe retirement thickness is
0.218" and the corrosion allowance is 0.125". What is the minimum thickness of pipe that could
be ordered after adjusting for mill-tolerance. - ANSWERS-E. 0.392"
4- A welder is being qualified by RT on a 0.600" plate using the SMAW process. What is the
maximum allowed length of an individual elongated slag inclusion for this qualifying test? -
ANSWERS-B. 0.200"
5- During the evaluation of a radiograph, the density at the IQI is 3.0. What is the minimum
density allowed on this radiograph in the weld? - ANSWERS-C. 2.55
6- A liquid Penentrant procedure must be qualified when performinf the examination: -
ANSWERS-C. on materials below 40 degrees F.
7- If the "A-Number" on the PQR is an A-2, what "A-Number" must be on the WPS? - ANSWERS-
C. A-1 or A-2
8- When welding pipe, peeing is prohibited on: - ANSWERS-D. only the root and final passes.
, 9- What is the diameter of the bolts that are used for a 6 NPS class 600 flange? - ANSWERS-A.
1.00 inch
10- The size of a fillet weld refers to the fillet weld's: - ANSWERS-A. Leg
What is the "F- Number" for an E-7018 electrode? - ANSWERS-D. F-4
12- For class 2 piping system, a location should consider performing CUI inspection on: -
ANSWERS-B. 33% of suspect areas
13- the set pressure for a relief device protecting piping systems shall be: - ANSWERS-D. set in
accordance with ASME B&PV section VIII
14- When performing a WFMPT examination, prior to the examination, the examiner shall be in
a darkened area for: - ANSWERS-C. 5 minutes
15- What is the maximum allowed hydrotest pressure for piping system with class 300 flanges
that are made of ASTM A182 gr. F316 material? the sustem has a design temperature of 600
degrees F. - ANSWERS-F. 1100 psig
16- What is the required preheat for an A 106 gr. B pipe that has a wall thickness of 0.500"? -
ANSWERS-E. preheat is not required
17- According to B31.3 a 1-1/2 NPS carbon steel threaded pipe that is installed in a Normal
Service should have a minimum wall thickness of: - ANSWERS-C. schedule 80.
18- Which of the following is an essential variable for welder qualification using the SMAW
process? - ANSWERS-B. deletion of backing
with Complete Solutions9
1- A hydrotest is being conducted on an underground line as a substitute for the external
inspection. The test pressure is 200 psig. At the end of the test, the pressure must be at least: -
ANSWERS-C.190 psig
2- Determine the maximum allowed pressure for a class 300 flange that has a design
temperature of 950 degrees F. The flange material is ASTM A217 gr.C12 - ANSWERS-B. 375 psig
3- An 8 NPS pipe is being replaced with A106 gr. B material. The pipe retirement thickness is
0.218" and the corrosion allowance is 0.125". What is the minimum thickness of pipe that could
be ordered after adjusting for mill-tolerance. - ANSWERS-E. 0.392"
4- A welder is being qualified by RT on a 0.600" plate using the SMAW process. What is the
maximum allowed length of an individual elongated slag inclusion for this qualifying test? -
ANSWERS-B. 0.200"
5- During the evaluation of a radiograph, the density at the IQI is 3.0. What is the minimum
density allowed on this radiograph in the weld? - ANSWERS-C. 2.55
6- A liquid Penentrant procedure must be qualified when performinf the examination: -
ANSWERS-C. on materials below 40 degrees F.
7- If the "A-Number" on the PQR is an A-2, what "A-Number" must be on the WPS? - ANSWERS-
C. A-1 or A-2
8- When welding pipe, peeing is prohibited on: - ANSWERS-D. only the root and final passes.
, 9- What is the diameter of the bolts that are used for a 6 NPS class 600 flange? - ANSWERS-A.
1.00 inch
10- The size of a fillet weld refers to the fillet weld's: - ANSWERS-A. Leg
What is the "F- Number" for an E-7018 electrode? - ANSWERS-D. F-4
12- For class 2 piping system, a location should consider performing CUI inspection on: -
ANSWERS-B. 33% of suspect areas
13- the set pressure for a relief device protecting piping systems shall be: - ANSWERS-D. set in
accordance with ASME B&PV section VIII
14- When performing a WFMPT examination, prior to the examination, the examiner shall be in
a darkened area for: - ANSWERS-C. 5 minutes
15- What is the maximum allowed hydrotest pressure for piping system with class 300 flanges
that are made of ASTM A182 gr. F316 material? the sustem has a design temperature of 600
degrees F. - ANSWERS-F. 1100 psig
16- What is the required preheat for an A 106 gr. B pipe that has a wall thickness of 0.500"? -
ANSWERS-E. preheat is not required
17- According to B31.3 a 1-1/2 NPS carbon steel threaded pipe that is installed in a Normal
Service should have a minimum wall thickness of: - ANSWERS-C. schedule 80.
18- Which of the following is an essential variable for welder qualification using the SMAW
process? - ANSWERS-B. deletion of backing
