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: - Correct Answer C.190 psig
2- Determine the maximum allowed pressure for a class 300 flange that has a de...
API 570 Open Book Exam (ANSWERED)
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: - Correct Answer
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 - Correct Answer 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. - Correct Answer 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? - Correct Answer 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? - Correct Answer C. 2.55
6- A liquid Penentrant procedure must be qualified when performinf the examination: - Correct Answer
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? - Correct Answer C.
A-1 or A-2
8- When welding pipe, peeing is prohibited on: - Correct Answer 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? - Correct Answer A. 1.00
inch
10- The size of a fillet weld refers to the fillet weld's: - Correct Answer A. Leg
, What is the "F- Number" for an E-7018 electrode? - Correct Answer D. F-4
12- For class 2 piping system, a location should consider performing CUI inspection on: - Correct Answer
B. 33% of suspect areas
13- the set pressure for a relief device protecting piping systems shall be: - Correct Answer 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: - Correct Answer 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. - Correct
Answer F. 1100 psig
16- What is the required preheat for an A 106 gr. B pipe that has a wall thickness of 0.500"? - Correct
Answer 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: - Correct Answer C. schedule 80.
18- Which of the following is an essential variable for welder qualification using the SMAW process? -
Correct Answer B. deletion of backing
19- Without performing impact tests, what is the minimum allowed temperature for the following piping
system?
Material: A106 gr. B
Line size: 6 NPS
Nominal thickness: 0.750"
Retirement thickness: 0.500" - Correct Answer C. +15 degrees F.
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