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1. Pressure applied inside a pipe creates stress in the pipe wall.

These stresses are highest on which weld orientation? Ans: longitudinal weld 2. Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal service? Ans: 10% 3. for welded pipe, the normal thickness of under-tolerance is? Ans: .010 or 10 mils 4. The corrosiveness of soils can be determined by measuring the soils: Ans: Resistivity 5. when qualifying a weld procedure the essential variables must: Ans: be recorded on both the WPS & PQR 6. In severe refinery services which type of pipe is normally used? Ans: seamless pipe 7. a pipe has a thickness designation of "40S". what does the "S" mean? Ans: Stainless steel 8. Generally socket-welded pipe is not used for nominal pipe sizes above: Ans: 2 inches 9. A propane piping system should be classified as? Ans: Class 1 10. According to ASME/ANSI B16.5 flanges from plate materials can only be used for: Ans: Blind flanges 11. Preheat should never be substituted for PWHT if: Ans: the PWHT was used to prevent environmental cracking. 12. During welding, non-esential variables: Ans: Must be recorded only on the WPS and must be followed by the welder.

When can radiography not be used to qualify a welder? Ans: when using the GMAW process with the short circuit mode 23.inches 24. A PQR test coupon with a shell thickness of "T" can generally be used to qualify a wall thickness on the WPS up to. the minimum light intensity should be: Ans: 100 footcandles . Ans: 2T 21.5 requires flanges to be: Ans: marked with the class rating. During pipe fabrication who has overall responsibility for compliance with the code? Ans: The owner/user 17. A welder becomes unqualified when he has not welded in: Ans: 6 months 20. Who has the responsibility to determine the extent of PMI (Positive Material Identification) performed? Ans: The owner/user 18. Generally. Graphitization of carbon steels begins to occur when metal temperatures exceed: Ans: 800°F 16. A pressure test is always required: Ans: whenever the authorized inspector believes one is necessary 22. all joints should be: Ans: left uninsulated 14. ASME/ANSI B16. An inservice process pipe should be classified as Class 1 when the % of H2S exceeds: Ans: 3% 19. raised face flanges should have a surface finish of: Ans: 125-250 micro.13. 15. During a direct visual exam of a pipe weld. During a hydrotest.

a welder's qualification records from a previous employer can: Ans: Be accepted if the inspector approves 32. When welding together piping components of different thicknesses.3. the preheat zone and/or PWHT must extend how far beyond the edge of the weld? Ans: 1 inch 35. it is recommended to excavate the soil: Ans: 6-12 inches. Ans: Vertical groove Weld 26. According to B31.25. The material verification program specified by API 578 covers: Ans: only pressure containing components. what is the interval for thickness measurements on a class 1 piping system? Ans: lesser of 5 years or half life of the pipe 31. When fabricating pipe. Carbon steel materials are most likely to be incorrectly substituted in: . Seal welding pipe threads: Ans: may be used to prevent leaks 27. Flange bolts are unacceptable if the bolt threads do not extend: Ans: inside the nut within 1 thread of the nut face 36. When performing soil-to air inspections on uncoated lines. 34. Liquid thermal relief valves should be set at a pressure not higher than: Ans: 120 % 28. When performing preheat prior to welding or PWHT. 30. Describe the 3G welding test position. unknown materials: Ans: Should never be used (except for door stops) 29. the thicker part should be trimmed with a: Ans: 30 degree taper. 33.

Flange leaks in certain fluids can cause: Ans: bolts to crack and corrode 46. use: Ans: At least 2 test blocks with thicknesses near the max and min to be examined. 45. When a relief device or valve is removed for repair. The RT procedure used for a pipe repair must conform to the requirements of: Ans: ASME Section 5 42. What is the minimum holding time for all pressure tests on piping? Ans: 10 mins 43. What do you call a groove in the parent metal at the toe of a weld? Ans: undercut 41. Per B31. Loose or broken anchor bolts at pipe supports are most easily detected by: . the inspector should: Ans: inspect the inside of the inlet and outlet piping where the valve was removed. Thickness measurements are suggested at pipe fittings since: Ans: directional changes generally create increased turbulence and corrosion. that has a delay line with single element unit. Heat Tracing could cause cracking in carbon steel piping which is in: Ans: Caustic service 47. Excessive repairs to pump bearings may be a result of: Ans: thermal growth 48. When calibrating a UT instrument. which welding discontinuity is always unacceptable? Ans: Cracks and Inadequate fusion 40. 44. 39.Ans: a chrome steel piping system. During pipe repairs. 37.3 how much of the fabrication should be visually examined for a pipe in severe cyclic service: Ans: 100 % 38.

how many of the joint assemblies should be examined? Ans: 100 % 50.Ans: hammer testing 49. preheat is substituted for the required PWHT. API 570 provides three methods of determination probable corrosion rates for these conditions. What is the minimum preheat temperature. During a pipe repair. Ans: 300° 51. A pneumatic pressure test is to be conducted on a Normal Service piping system. Suggested interval for above-grade visual surveillance of burried pipe Ans: 6 months 57.1. The corrosion rate for newly installed piping systems or for changes in service must be established. During pipe erection. Minimum time an examiner should be in a darkened area prior to using a black light when performing MT & PT exam Ans: 5 min 52. Ans: API 570 paragraph 7. Maximum time before obtaining thickness readings when corrosion rate on new pipe is not kmown (no other data available) Ans: 3 months 55. Maximum interval for a visual examiner's eye check Ans: 1 year 58. Minimum duration of hydro test to evaluation integrity of a burried pipe Ans: 8hr 54. Maximum time that a welder maintains qualifications for a welding process without using that process Ans: 6 months 56.2 53. Length of time before an API 570 inspector must recertify Ans: 6 years .

Corrosion rates on existing piping systems shall be calculated on either a short-term or a long-term basis. 67. Maximum inspection inerval for clean/non fouling service PRD's Ans: 10 years 65. When performing a visual exam. Suggested interval . the minimum angle of eye to part Ans: 30° 70. Maximum external inspection interval for Class 3 piping Ans: 10 years 66. How is the short-term corrosion rate calculated? Ans: Readings from the two most recent inspections shall be used. API 570 paragraph 7. Maximum thickness Inspection interval for injection point Ans: Lesser 3 years or Half life 60. Maximum thickness Inspection interval for Class 2 & 3 piping: Ans: The lesser of 10 years or half life of the pipe. Maximum External Inspection interval for Class 1 & 2 Piping Ans: 5 years 61.3 64.1. Suggested interval for evaluation of Soil corrosivity of buried pipe w/o CP Ans: 5 years 63.59. When should temporary pipe repairs be replaced? Ans: Next opportunity 68. Hole size that must be visible in RT when using Hole-type IQI Ans: 2T .Close interval Potential Survey of buried pipe w/ poor CP Ans: 5 years 62. When shall temporary leak sealing devices be removed and pipe repaired? Ans: Next turnaround 69.

Two most common CS pipe materials Ans: A53 & A106 77. Code to follow when performing an internal inspection on pipe Ans: API 510 82. MT. Lead letter used during RT to check for backscatter Ans: B 74. Maximum stress allowed during a pressure test Ans: 90% of SMYS (Specified Minimum Yield Strength) 78. Lead letter used during RT to indicate a film-side IQI Ans: F 75. Minimun light intensity when performing VT. Maximum allowed thickness on a WPS based on the plate thickness (T) of a PQR coupon Ans: 2T 72. or PT exam Ans: 100 foot-candles 73. Code for PMI (positive material identification) Ans: API 578 .000 psi 80. Two primary gamma ray radiation sources Ans: Iridium & Cobalt 76. Typical external corrosion rate for dry rural environment Ans: <1 mpy 81.71. Maximum allowed SMYS (Specified Minimum Yield Strength) for pipe if fillet welded patch is installed Ans: 40. pH of hydro test water needed to reduce likelihood of MIC Ans: >10 79.

Design code for fabrication of piping relief devices Ans: ASME section VIII 90. Code for Welder qualification Ans: ASME Section IX 91. Which material must use low chloride hydro test water & must be died after hydro test? . Code for Weld procedure qualification Ans: ASME Section IX 92. Code for NDE procedures guidelines Ans: ASME Section 5 89. Materials subject to temper-embrittlement Ans: Low Alloy Chromes 94.83. Code for Valve Inspection and testing Ans: API 598 86. Code for Welding on In-Service equipment containing Flammables (hot tapping) Ans: API 2201 88. NDE personnel qualification Ans: ASNT SNT-TC-1A 93. Code for FFS (Fitness for Service) Ans: API 579 84. Materials subject to chloride stress corrosion cracking Ans: 300 series Stainless Steel 95. Code for RBI (Risk Based Inspection) Ans: API 580 85. Code for Cathodic Protection Ans: API 651 87.

Low alloy steels can contain up to how much chrome? Ans: 9% 104. The following is an Austenitic SS Ans: 316 series Stainless Steel 105. The following is not a Ferritic Steel Ans: 300 series Stainless Steel 103. How is the long-term corrosion rate calculated? Ans: Wall thicknesses from the most recent and initial (or nominal) inspections shall be used. Corrosion rates on existing piping systems shall be calculated on either a short-term or a long-term basis.5%" 99. Mill tolerance of seamless pipe Ans: "-12. Materials where preheat can be substituted for PWHT Ans: P1 & P3 98.1. The following is a Ferritic SS Ans: 405 series Stainless Steel 106. Nickel alloys are what % nickel? . What does the "H" mean in Austenitic SS.Ans: 300 series Stainless Steel 96. like 304 L? Ans: Low Carbon 101. What does the "L" mean in Austenitic SS. API 570 paragraph 7. The following is a martensitic SS Ans: 410 series Stainless Steel 107. What material is subject to polytheonic acid stress corrosion cracking? Ans: Sensitized 300 SS 97. like 316 H? Ans: High Carbon 102.1 100.

The calculations for maximum allowable working pressure (MAWP) for known materials shall be as provided for in ASME B31.Ans: 30% True or False 108. Which material is Least affected by Brittle Fracture? Ans: 300 series Stainless Steel 110. What test is used to determine a materials toughness? Ans: Charpy Impact Test 113. Ans: True 109. ASME Sec. a 4" thick 5 chrome vessel operates at 1200 psig and 900°F. API 570 paragraph 7.3 or the code to which the piping was designed and fabricated (applicable code). Resistance to Brittle Fracture is called: Ans: toughness 111. What information is not required to be available and comply with the principles of the applicable code? Ans: The name of the original manufacturer. most brittle fractures appear as: Ans: Cleavage 117.2 . When is the vessel lest likely to fail from Brittle Fracture? Ans: During normal operation 116.What increases the likelihood of brittle fracture? Ans: large grain size & Thicker materials 112. A Brittle Fracture grows very rapidly with minimum deformation prior to failure. VIII had few limitations concerning Brittle Fracture prior to: Ans: 1987 115. Most Brittle Fractures occur: Ans: Below the impact transition temperature 114.

Minimum downstream limit of injection point circuit Ans: lesser of 1st directional change +25 feet or 2nd directional change 125. What is the limit of soil to air area distance in soil away from interface? Ans: 12 inches 123. Limits of soil to air area distance in air away from interface Ans: 6 inches 121. Distance to dig when inspectng for soil to air corrosion Ans: 6-12 inches 122. owing to corrosion + MAWP increased for the whole system is called? Ans: repair and re-rating True or False 126. ASME code for valves . When recalculating MAWP of piping systems for continued use. When the MAWP is recalculated for piping systems of unknown materials. API 570 paragraph 7.118. is based solely on pressure. API 570 paragraph 7. Minimum length of buried pipe to expose when excavating for inspection Ans: 6-8 feet 124. API 570 paragraph 7. Which dimension stay the same regardless of the wall scheduled thickness? Ans: Outside Diameter 128.2 119. Change of an identical item. Ans: False.2 120.3 127. what information is used? Ans: The lowest grade material and joint efficiency in the applicable code. or retirement thickness. The minimum required pipe wall thickness. what thickness is used? Ans: The actual thicknesses determined by inspection minus twice the estimated corrosion loss before the date of the next inspection.

Important requirement of Material verification program Ans: Documented Roles and responsibilities 131. . Prefered inspection method for injection points Ans: RT and/or UT 130. What are the most common material nonconformances with serious consequences? Ans: Low Alloy steel pipe replaced by Carbon steel pipe 134. Piping most involved in material mixup Ans: bypass piping. short circuit. 135.Ans: B16. What indicates internal CO2 corrosion Ans: Smooth grooving of pipe wall 138.34 129. % of Material examiniation for high risk piping system with likely material mixup Ans: 100% 133. small diameter (≤2NPS) piping. Modes of GMAW (Gas metal arc weld) Ans: Globular. valves and bolts. Effect of T on Soil corrosion rate Ans: Corrosion Increases with Increase in T 137. Material most susceptible to brittle fracture Ans: Ferritics CS & Low Alloy SS 136. Material with highest resistance to sulfidation Ans: 18/8 SS 139. Two main types of Environmental cracking Ans: Caustic stress corrosion cracking and Caustic embrittlement 140. and spray transfer. PMI stands for Ans: Positive Material Identification 132.

API 570 paragraph 7.5 . What should be done when unexpected movement of a piping system is observed? Ans: The inspector should discuss these observations with the piping engineer and evaluate the need for conducting a piping stress analysis. Advantage of GTAW (Gas tungsten arc welding) Ans: Best control of weld pooling 143.141. Welding process with no creation of slag Ans: GMAW(Gas Metal Arc Welding) and GTAW (Gas Tungsten Arc Welding) 145. Welding process where filler rod is added by hand Ans: GTAW (Gas tungsten arc welding) 142. Electrode for SMAW (Shielded metal arc weld) for low hydrogen application Ans: Basic 147. What type of weld for flush insert patches can be used in corroded areas? Ans: penetration groove weld 148. Flux type for low hydrogen use with SAW (Submerged arc welding) Ans: Agglomerated 146. section 11 149. Welding process which can be automated Ans: SAW (Submerged arc welding) 144. FFS evaluation should be performed in accordance with: Ans: API 579. To evaluate the effects of fire damage.