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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.

all joints should be: Ans: left uninsulated 14. A welder becomes unqualified when he has not welded in: Ans: 6 months 20. Graphitization of carbon steels begins to occur when metal temperatures exceed: Ans: 800°F 16. An inservice process pipe should be classified as Class 1 when the % of H2S exceeds: Ans: 3% 19. A pressure test is always required: Ans: whenever the authorized inspector believes one is necessary 22. A PQR test coupon with a shell thickness of "T" can generally be used to qualify a wall thickness on the WPS up to.inches 24. raised face flanges should have a surface finish of: Ans: 125-250 micro. ASME/ANSI B16. During a hydrotest. 15. During pipe fabrication who has overall responsibility for compliance with the code? Ans: The owner/user 17.13. the minimum light intensity should be: Ans: 100 footcandles . Generally. Who has the responsibility to determine the extent of PMI (Positive Material Identification) performed? Ans: The owner/user 18.5 requires flanges to be: Ans: marked with the class rating. Ans: 2T 21. During a direct visual exam of a pipe weld. When can radiography not be used to qualify a welder? Ans: when using the GMAW process with the short circuit mode 23.

34. 33. Describe the 3G welding test position. Liquid thermal relief valves should be set at a pressure not higher than: Ans: 120 % 28.25. it is recommended to excavate the soil: Ans: 6-12 inches. a welder's qualification records from a previous employer can: Ans: Be accepted if the inspector approves 32. The material verification program specified by API 578 covers: Ans: only pressure containing components. According to B31. what is the interval for thickness measurements on a class 1 piping system? Ans: lesser of 5 years or half life of the pipe 31.3. unknown materials: Ans: Should never be used (except for door stops) 29. the thicker part should be trimmed with a: Ans: 30 degree taper. Carbon steel materials are most likely to be incorrectly substituted in: . When welding together piping components of different thicknesses. the preheat zone and/or PWHT must extend how far beyond the edge of the weld? Ans: 1 inch 35. Flange bolts are unacceptable if the bolt threads do not extend: Ans: inside the nut within 1 thread of the nut face 36. 30. Seal welding pipe threads: Ans: may be used to prevent leaks 27. When performing preheat prior to welding or PWHT. When performing soil-to air inspections on uncoated lines. Ans: Vertical groove Weld 26. When fabricating pipe.

Thickness measurements are suggested at pipe fittings since: Ans: directional changes generally create increased turbulence and corrosion. During pipe repairs. The RT procedure used for a pipe repair must conform to the requirements of: Ans: ASME Section 5 42. When calibrating a UT instrument. that has a delay line with single element unit. 45. When a relief device or valve is removed for repair. which welding discontinuity is always unacceptable? Ans: Cracks and Inadequate fusion 40. Excessive repairs to pump bearings may be a result of: Ans: thermal growth 48. 39. Per B31. 44. Flange leaks in certain fluids can cause: Ans: bolts to crack and corrode 46. What do you call a groove in the parent metal at the toe of a weld? Ans: undercut 41. Loose or broken anchor bolts at pipe supports are most easily detected by: .3 how much of the fabrication should be visually examined for a pipe in severe cyclic service: Ans: 100 % 38. Heat Tracing could cause cracking in carbon steel piping which is in: Ans: Caustic service 47.Ans: a chrome steel piping system. the inspector should: Ans: inspect the inside of the inlet and outlet piping where the valve was removed. What is the minimum holding time for all pressure tests on piping? Ans: 10 mins 43. 37. use: Ans: At least 2 test blocks with thicknesses near the max and min to be examined.

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 54.1. Suggested interval for above-grade visual surveillance of burried pipe Ans: 6 months 57. Maximum time that a welder maintains qualifications for a welding process without using that process Ans: 6 months 56. API 570 provides three methods of determination probable corrosion rates for these conditions. A pneumatic pressure test is to be conducted on a Normal Service piping system. how many of the joint assemblies should be examined? Ans: 100 % 50. 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. Length of time before an API 570 inspector must recertify Ans: 6 years . What is the minimum preheat temperature. Ans: API 570 paragraph 7. During a pipe repair.Ans: hammer testing 49. preheat is substituted for the required PWHT. During pipe erection.2 53. Maximum time before obtaining thickness readings when corrosion rate on new pipe is not kmown (no other data available) Ans: 3 months 55. The corrosion rate for newly installed piping systems or for changes in service must be established. Ans: 300° 51.

Suggested interval . Maximum inspection inerval for clean/non fouling service PRD's Ans: 10 years 65. How is the short-term corrosion rate calculated? Ans: Readings from the two most recent inspections shall be used. API 570 paragraph 7. the minimum angle of eye to part Ans: 30° 70. Maximum thickness Inspection interval for injection point Ans: Lesser 3 years or Half life 60. When performing a visual exam. When shall temporary leak sealing devices be removed and pipe repaired? Ans: Next turnaround 69. 67.59. 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 3 piping Ans: 10 years 66. 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 62.3 64. When should temporary pipe repairs be replaced? Ans: Next opportunity 68.1. Maximum External Inspection interval for Class 1 & 2 Piping Ans: 5 years 61. Suggested interval for evaluation of Soil corrosivity of buried pipe w/o CP Ans: 5 years 63. Corrosion rates on existing piping systems shall be calculated on either a short-term or a long-term basis.

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. Typical external corrosion rate for dry rural environment Ans: <1 mpy 81. Two most common CS pipe materials Ans: A53 & A106 77. 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. Minimun light intensity when performing VT. Lead letter used during RT to indicate a film-side IQI Ans: F 75. or PT exam Ans: 100 foot-candles 73. Code to follow when performing an internal inspection on pipe Ans: API 510 82.71.000 psi 80. MT. Code for PMI (positive material identification) Ans: API 578 . Two primary gamma ray radiation sources Ans: Iridium & Cobalt 76. Maximum allowed thickness on a WPS based on the plate thickness (T) of a PQR coupon Ans: 2T 72.

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 NDE procedures guidelines Ans: ASME Section 5 89. Code for Cathodic Protection Ans: API 651 87. Code for RBI (Risk Based Inspection) Ans: API 580 85. Code for Valve Inspection and testing Ans: API 598 86. Code for Weld procedure qualification Ans: ASME Section IX 92. Materials subject to chloride stress corrosion cracking Ans: 300 series Stainless Steel 95. Code for Welding on In-Service equipment containing Flammables (hot tapping) Ans: API 2201 88.83. Materials subject to temper-embrittlement Ans: Low Alloy Chromes 94. Design code for fabrication of piping relief devices Ans: ASME section VIII 90. Code for FFS (Fitness for Service) Ans: API 579 84. NDE personnel qualification Ans: ASNT SNT-TC-1A 93.

1. Low alloy steels can contain up to how much chrome? Ans: 9% 104.1 100. What does the "L" mean in Austenitic SS. Nickel alloys are what % nickel? . How is the long-term corrosion rate calculated? Ans: Wall thicknesses from the most recent and initial (or nominal) inspections shall be used. The following is not a Ferritic Steel Ans: 300 series Stainless Steel 103. What does the "H" mean in Austenitic SS.Ans: 300 series Stainless Steel 96. The following is an Austenitic SS Ans: 316 series Stainless Steel 105. API 570 paragraph 7. Corrosion rates on existing piping systems shall be calculated on either a short-term or a long-term basis. What material is subject to polytheonic acid stress corrosion cracking? Ans: Sensitized 300 SS 97. like 304 L? Ans: Low Carbon 101. Mill tolerance of seamless pipe Ans: "-12. like 316 H? Ans: High Carbon 102. The following is a Ferritic SS Ans: 405 series Stainless Steel 106.5%" 99. The following is a martensitic SS Ans: 410 series Stainless Steel 107. Materials where preheat can be substituted for PWHT Ans: P1 & P3 98.

ASME Sec. When is the vessel lest likely to fail from Brittle Fracture? Ans: During normal operation 116. 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. What information is not required to be available and comply with the principles of the applicable code? Ans: The name of the original manufacturer.2 . VIII had few limitations concerning Brittle Fracture prior to: Ans: 1987 115. What test is used to determine a materials toughness? Ans: Charpy Impact Test 113. Which material is Least affected by Brittle Fracture? Ans: 300 series Stainless Steel 110. a 4" thick 5 chrome vessel operates at 1200 psig and 900°F. Most Brittle Fractures occur: Ans: Below the impact transition temperature 114. A Brittle Fracture grows very rapidly with minimum deformation prior to failure. Ans: True 109. most brittle fractures appear as: Ans: Cleavage 117. 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 increases the likelihood of brittle fracture? Ans: large grain size & Thicker materials 112.

what information is used? Ans: The lowest grade material and joint efficiency in the applicable code. or retirement thickness. owing to corrosion + MAWP increased for the whole system is called? Ans: repair and re-rating True or False 126. Minimum downstream limit of injection point circuit Ans: lesser of 1st directional change +25 feet or 2nd directional change 125. Ans: False. What is the limit of soil to air area distance in soil away from interface? Ans: 12 inches 123. what thickness is used? Ans: The actual thicknesses determined by inspection minus twice the estimated corrosion loss before the date of the next inspection. Limits of soil to air area distance in air away from interface Ans: 6 inches 121. When recalculating MAWP of piping systems for continued use. The minimum required pipe wall thickness.3 127. Minimum length of buried pipe to expose when excavating for inspection Ans: 6-8 feet 124.2 119. ASME code for valves . API 570 paragraph 7. Change of an identical item.2 120. When the MAWP is recalculated for piping systems of unknown materials. API 570 paragraph 7. Distance to dig when inspectng for soil to air corrosion Ans: 6-12 inches 122. API 570 paragraph 7.118. is based solely on pressure. Which dimension stay the same regardless of the wall scheduled thickness? Ans: Outside Diameter 128.

Modes of GMAW (Gas metal arc weld) Ans: Globular. PMI stands for Ans: Positive Material Identification 132. . Important requirement of Material verification program Ans: Documented Roles and responsibilities 131. Piping most involved in material mixup Ans: bypass piping. What are the most common material nonconformances with serious consequences? Ans: Low Alloy steel pipe replaced by Carbon steel pipe 134. short circuit. Two main types of Environmental cracking Ans: Caustic stress corrosion cracking and Caustic embrittlement 140. small diameter (≤2NPS) piping.34 129. Material most susceptible to brittle fracture Ans: Ferritics CS & Low Alloy SS 136.Ans: B16. 135. and spray transfer. Material with highest resistance to sulfidation Ans: 18/8 SS 139. % of Material examiniation for high risk piping system with likely material mixup Ans: 100% 133. Prefered inspection method for injection points Ans: RT and/or UT 130. valves and bolts. Effect of T on Soil corrosion rate Ans: Corrosion Increases with Increase in T 137. What indicates internal CO2 corrosion Ans: Smooth grooving of pipe wall 138.

Welding process where filler rod is added by hand Ans: GTAW (Gas tungsten arc welding) 142. 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. section 11 149. Welding process with no creation of slag Ans: GMAW(Gas Metal Arc Welding) and GTAW (Gas Tungsten Arc Welding) 145.5 . Flux type for low hydrogen use with SAW (Submerged arc welding) Ans: Agglomerated 146.141. Advantage of GTAW (Gas tungsten arc welding) Ans: Best control of weld pooling 143. To evaluate the effects of fire damage. Electrode for SMAW (Shielded metal arc weld) for low hydrogen application Ans: Basic 147. API 570 paragraph 7. FFS evaluation should be performed in accordance with: Ans: API 579. What type of weld for flush insert patches can be used in corroded areas? Ans: penetration groove weld 148. Welding process which can be automated Ans: SAW (Submerged arc welding) 144.