API 570 Open Book Exam Questions with Certified Solutions

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: 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 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. 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? 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? C. 2.556- A liquid Penentrant procedure must be qualified when performinf the examination: 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? C. A-1 or A-2 8- When welding pipe, peeing is prohibited on: D. only the root and final passes. 9- What is the diameter of the bolts that