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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.

ASME/ANSI B16.inches 24. all joints should be: Ans: left uninsulated 14. Who has the responsibility to determine the extent of PMI (Positive Material Identification) performed? Ans: The owner/user 18.13. When can radiography not be used to qualify a welder? Ans: when using the GMAW process with the short circuit mode 23. Graphitization of carbon steels begins to occur when metal temperatures exceed: Ans: 800°F 16. During a hydrotest. A pressure test is always required: Ans: whenever the authorized inspector believes one is necessary 22. A welder becomes unqualified when he has not welded in: Ans: 6 months 20. A PQR test coupon with a shell thickness of "T" can generally be used to qualify a wall thickness on the WPS up to. An inservice process pipe should be classified as Class 1 when the % of H2S exceeds: Ans: 3% 19. Generally. During pipe fabrication who has overall responsibility for compliance with the code? Ans: The owner/user 17. Ans: 2T 21.5 requires flanges to be: Ans: marked with the class rating. the minimum light intensity should be: Ans: 100 footcandles . raised face flanges should have a surface finish of: Ans: 125-250 micro. 15. During a direct visual exam of a pipe weld.

unknown materials: Ans: Should never be used (except for door stops) 29. When fabricating pipe. the thicker part should be trimmed with a: Ans: 30 degree taper. When performing preheat prior to welding or PWHT. 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. Ans: Vertical groove Weld 26. When welding together piping components of different thicknesses. a welder's qualification records from a previous employer can: Ans: Be accepted if the inspector approves 32.25. Describe the 3G welding test position. 34. Flange bolts are unacceptable if the bolt threads do not extend: Ans: inside the nut within 1 thread of the nut face 36.3. According to B31. When performing soil-to air inspections on uncoated lines. Liquid thermal relief valves should be set at a pressure not higher than: Ans: 120 % 28. it is recommended to excavate the soil: Ans: 6-12 inches. The material verification program specified by API 578 covers: Ans: only pressure containing components. 30. Carbon steel materials are most likely to be incorrectly substituted in: . 33. Seal welding pipe threads: Ans: may be used to prevent leaks 27. the preheat zone and/or PWHT must extend how far beyond the edge of the weld? Ans: 1 inch 35.

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

Maximum time before obtaining thickness readings when corrosion rate on new pipe is not kmown (no other data available) Ans: 3 months 55. During pipe erection. API 570 provides three methods of determination probable corrosion rates for these conditions.1. Suggested interval for above-grade visual surveillance of burried pipe Ans: 6 months 57.2 53. What is the minimum preheat temperature. During a pipe repair. preheat is substituted for the required PWHT. Ans: API 570 paragraph 7. 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. The corrosion rate for newly installed piping systems or for changes in service must be established. how many of the joint assemblies should be examined? Ans: 100 % 50. Maximum time that a welder maintains qualifications for a welding process without using that process Ans: 6 months 56. Length of time before an API 570 inspector must recertify Ans: 6 years . A pneumatic pressure test is to be conducted on a Normal Service piping system. Ans: 300° 51.Ans: hammer testing 49. Minimum duration of hydro test to evaluation integrity of a burried pipe Ans: 8hr 54. Maximum interval for a visual examiner's eye check Ans: 1 year 58.

59. 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. 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. When should temporary pipe repairs be replaced? Ans: Next opportunity 68. 67. When performing a visual exam. Maximum thickness Inspection interval for Class 2 & 3 piping: Ans: The lesser of 10 years or half life of the pipe. When shall temporary leak sealing devices be removed and pipe repaired? Ans: Next turnaround 69.1. the minimum angle of eye to part Ans: 30° 70. Corrosion rates on existing piping systems shall be calculated on either a short-term or a long-term basis. Hole size that must be visible in RT when using Hole-type IQI Ans: 2T . Maximum external inspection interval for Class 3 piping Ans: 10 years 66. Suggested interval . API 570 paragraph 7. Maximum thickness Inspection interval for injection point Ans: Lesser 3 years or Half life 60.Close interval Potential Survey of buried pipe w/ poor CP Ans: 5 years 62.3 64.

Maximum allowed thickness on a WPS based on the plate thickness (T) of a PQR coupon Ans: 2T 72. Two most common CS pipe materials Ans: A53 & A106 77. Code for PMI (positive material identification) Ans: API 578 . Maximum allowed SMYS (Specified Minimum Yield Strength) for pipe if fillet welded patch is installed Ans: 40. Typical external corrosion rate for dry rural environment Ans: <1 mpy 81. Code to follow when performing an internal inspection on pipe Ans: API 510 82. MT. Two primary gamma ray radiation sources Ans: Iridium & Cobalt 76. Minimun light intensity when performing VT. or PT exam Ans: 100 foot-candles 73. Lead letter used during RT to check for backscatter Ans: B 74.000 psi 80. 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. pH of hydro test water needed to reduce likelihood of MIC Ans: >10 79.71.

Code for Weld procedure qualification Ans: ASME Section IX 92. Code for Cathodic Protection Ans: API 651 87. Code for RBI (Risk Based Inspection) Ans: API 580 85. Code for FFS (Fitness for Service) Ans: API 579 84. NDE personnel qualification Ans: ASNT SNT-TC-1A 93. Code for Welder qualification Ans: ASME Section IX 91. Code for NDE procedures guidelines Ans: ASME Section 5 89. Code for Valve Inspection and testing Ans: API 598 86. 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. Which material must use low chloride hydro test water & must be died after hydro test? . Design code for fabrication of piping relief devices Ans: ASME section VIII 90. Materials subject to temper-embrittlement Ans: Low Alloy Chromes 94.

What does the "L" mean in Austenitic SS. The following is a Ferritic SS Ans: 405 series Stainless Steel 106. The following is not a Ferritic Steel Ans: 300 series Stainless Steel 103. like 304 L? Ans: Low Carbon 101. Nickel alloys are what % nickel? . The following is an Austenitic SS Ans: 316 series Stainless Steel 105. What does the "H" mean in Austenitic SS.Ans: 300 series Stainless Steel 96. Mill tolerance of seamless pipe Ans: "-12. Corrosion rates on existing piping systems shall be calculated on either a short-term or a long-term basis.5%" 99.1 100. How is the long-term corrosion rate calculated? Ans: Wall thicknesses from the most recent and initial (or nominal) inspections shall be used. What material is subject to polytheonic acid stress corrosion cracking? Ans: Sensitized 300 SS 97. like 316 H? Ans: High Carbon 102. Materials where preheat can be substituted for PWHT Ans: P1 & P3 98.1. The following is a martensitic SS Ans: 410 series Stainless Steel 107. API 570 paragraph 7. Low alloy steels can contain up to how much chrome? Ans: 9% 104.

Which material is Least affected by Brittle Fracture? Ans: 300 series Stainless Steel 110. The calculations for maximum allowable working pressure (MAWP) for known materials shall be as provided for in ASME B31. When is the vessel lest likely to fail from Brittle Fracture? Ans: During normal operation 116. most brittle fractures appear as: Ans: Cleavage 117. ASME Sec. Resistance to Brittle Fracture is called: Ans: toughness 111. A Brittle Fracture grows very rapidly with minimum deformation prior to failure. What information is not required to be available and comply with the principles of the applicable code? Ans: The name of the original manufacturer. Ans: True 109. a 4" thick 5 chrome vessel operates at 1200 psig and 900°F.Ans: 30% True or False 108. What test is used to determine a materials toughness? Ans: Charpy Impact Test 113.What increases the likelihood of brittle fracture? Ans: large grain size & Thicker materials 112. VIII had few limitations concerning Brittle Fracture prior to: Ans: 1987 115. API 570 paragraph 7. Most Brittle Fractures occur: Ans: Below the impact transition temperature 114.3 or the code to which the piping was designed and fabricated (applicable code).2 .

ASME code for valves .2 119. API 570 paragraph 7. Distance to dig when inspectng for soil to air corrosion Ans: 6-12 inches 122. or retirement thickness.3 127. API 570 paragraph 7. Which dimension stay the same regardless of the wall scheduled thickness? Ans: Outside Diameter 128. is based solely on pressure. owing to corrosion + MAWP increased for the whole system is called? Ans: repair and re-rating True or False 126. Minimum length of buried pipe to expose when excavating for inspection Ans: 6-8 feet 124. what information is used? Ans: The lowest grade material and joint efficiency in the applicable code.118. API 570 paragraph 7. When recalculating MAWP of piping systems for continued use. what thickness is used? Ans: The actual thicknesses determined by inspection minus twice the estimated corrosion loss before the date of the next inspection. 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 121.2 120. Change of an identical item. Ans: False. When the MAWP is recalculated for piping systems of unknown materials. The minimum required pipe wall thickness.

Piping most involved in material mixup Ans: bypass piping. Prefered inspection method for injection points Ans: RT and/or UT 130. 135. short circuit. What are the most common material nonconformances with serious consequences? Ans: Low Alloy steel pipe replaced by Carbon steel pipe 134. Material most susceptible to brittle fracture Ans: Ferritics CS & Low Alloy SS 136. Two main types of Environmental cracking Ans: Caustic stress corrosion cracking and Caustic embrittlement 140. . and spray transfer. Material with highest resistance to sulfidation Ans: 18/8 SS 139. Important requirement of Material verification program Ans: Documented Roles and responsibilities 131. valves and bolts. % of Material examiniation for high risk piping system with likely material mixup Ans: 100% 133. Modes of GMAW (Gas metal arc weld) Ans: Globular. small diameter (≤2NPS) piping.Ans: B16. Effect of T on Soil corrosion rate Ans: Corrosion Increases with Increase in T 137.34 129. What indicates internal CO2 corrosion Ans: Smooth grooving of pipe wall 138. PMI stands for Ans: Positive Material Identification 132.

5 . Welding process which can be automated Ans: SAW (Submerged arc welding) 144. To evaluate the effects of fire damage.141. What type of weld for flush insert patches can be used in corroded areas? Ans: penetration groove weld 148. 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. FFS evaluation should be performed in accordance with: Ans: API 579. API 570 paragraph 7. Flux type for low hydrogen use with SAW (Submerged arc welding) Ans: Agglomerated 146. section 11 149. Welding process with no creation of slag Ans: GMAW(Gas Metal Arc Welding) and GTAW (Gas Tungsten Arc Welding) 145. Advantage of GTAW (Gas tungsten arc welding) Ans: Best control of weld pooling 143. 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.