15_API_570_-_Open_Book_Mockup_Exam_Final.doc

On a class 1500 nps 4 blind flange what is the

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31. On a class 1500 NPS 4 blind flange, what is the minimum thickness permitted? 1. 1.12” 2. 1.88” 3. 2.12” 4. 2.88” 32. For 1 1/4” thick Carbon steel, what is the recommended preheat temperature? 1. 300°F 2. 235°F 3. 175°F 4. None 33. Determine the MAWP of the following piping system , at the next inspection, based on the following Design pressure/temperature - 100 psig/100°F Pipe description - NPS 20, Sch. std, A 106 B Outside diameter of pipe, D - 20” Thickness determined from Inspection - 0.280” Observed Corrosion Rate - 0.02 inches/year Next planned inspection - 5 Years MAWP= ______________ 1. 160 psig 2. 550 psig 3. 723 psig 4. 125 psig 34. What is the inspection interval for buried piping without cathodic protection, the soil resistivity is 6,500 ohm-cm? 1. 10 years 2. 15 years 3. 5 years 4. whenever a leak is suspected 35. What is the maximum length allowed for individual slag trapped in a weld in a Severe Cyclic Conditions piping system? 1. >TW X 3 2. =TW / 3 3. =12T 4. 3/23”
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(API-570-Mockup-OB) 8/10 36. What is the design thickness of NPS 2 ½, SA106 Gr.B pipe that operates at 25 psi / 200°F 1. 0.275” 2. 0.100” 3. 0.002” 4. not enough information given 37. With respect to Category ‘D’ service, what is the maximum allowable undercut for a branch connection? 1. Zero (no evident imperfections) 2. = 1/32” 3. = 1 mm 4. Both B and C 38. What is the test pressure of a metallic piping system whose design temperature is above the test temperature using the following conditions? 1. 150 psi 2. 450 psi 3. 278 psi 4. Test temperature verses design temperatures are not different 39. Determine the MAWP of the following piping system, at the next inspection, based on the following Design pressure/temperature - 100 psig/750°F Pipe description - NPS 6, A285 C EFW, Straight Seam(No radiography) Outside diameter of pipe, D - 6 5/8” Thickness determined from Inspection - 0.280” Observed Corrosion Rate - 0.01 inches/year Next planned inspection - 5 Years MAWP= ______________ 1. 522 psig 2. 487 psig 3. 878 psig 4. 125 psig 40. Impact testing of each form of material for any specification shall be done using procedures and apparatus in accordance with 1. ASTM A 370 2. ASME Section V 3. API 570 4. AWS D 1.5
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(API-570-Mockup-OB) 9/10 41.In the AWS D 5.1, what is the designation for cellulose DCEP electrode? 1. E 7018 2. E 7016 3. E 6011 4. E 6010 42. With respect to a Class 400, NPS 12 slip on raised face flange, whose edges of the gasket do not extend to the bolt, what is the outside diameterof the gasket? 1. 12.75” 2. 15.00” 3. 16.50” 4. 18.00” 43. The base metal is P.No.8, the weld metal is A. No.8-9, and the wall thickness is 1”, what is the hold time for heat treatment 1. None 2. 1 hour 3. 2 hours 4. ½ hour for each 1” thickness
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  • Winter '17
  • selvi
  • MAWP

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