API 510 Closed Exam

Closed Book API 510 Practice Exam C

Question 36 begins the closed book portion of this exam! It is recommended that you take this portion without referring to the ASME Code or API books on your first attempt, to assess your strengths and concentrate your studies on the most needed subject areas. It is suggested that you write your answers on a separate separ ate sheet to keep this copy clean for future studies. 36. If a crack is discovered in a base metal it should be completely removed and then the excavation examined using an appropriate NDE technique before before a welded repair is attempted. A concern that must be addressed in this repair process is that; 1. 2. 3. 4.

This type of repair is difficult to make in the overhead welding position. The crack length must not exceed 6 times the base metal thickness. Any effort to remove the crack using arc gouging may cause the crack to grow. The crack tips must be drill hole stopped prior to welding.

37. The Inspection Department's Department's preparation for a vessel vessel inspection cycle should include; include; 1. 2. 3. 4.

Time coordination for contractors. Information about the contractors who will do any welding. The retirement thickness of vessels to be inspected to provide for a plan of action if a problem is discovered, there may be little time for consulting with others. Identifying who last inspected the vessel.

38. A hole type IQI is designated designated as a number 15 and its thickness is 0.015 0.015 inch, what would be the diameter diameter of the 2T hole in this penetrameter? 1. 2. 3. 4.

0.015 inch 0.150 inch 0.030 inch 0.300 inch

39. Define re-rating re-rating according to the API 510 Code. Code. 1. 2. 3. 4.

A change in either the temperature ratings or the maximum allowable working pressure rating or change in both. Replacement of a part with one rated at a higher pressure than the original part. Replacement of a part with and identical component. A change in the operating flow rate in a vessel to one higher than that of the original design.

40. A permissible way way to allow for corrosion in a vessel vessel is to; 1. 2. 3. 4.

Place epoxy liners in the corroded area. Increase safety device settings. Re-rate below original design conditions. Lower temperature and increase pressure on parts of the vessel not in question.

41. According to API 510 510 when would a repair constitute constitute a rerating? 1. 2. 3. 4.

The repair changes the design pressure. The repair changes the design temperature. The repair changes the design pressure and/or the design temperature. A new name plate stating a new design pressure or temperature.

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Closed Book API 510 Practice Exam C 42. Hydrogen blisters can form at many different depths from the surface surface of the steel, in the middle of the plate or near a weld. In some cases, neighboring or adjacent blisters that are at slightly different depths (planes) may develop cracks that link them together. This describes _________________. 1. 2. 3. 4.

Hydrogen blistering Sulfide Stress Corrosion Cracking (SSC) Hydrogen Induced Cracking (HIC) Stress Oriented Hydrogen Induced Cracking (SOHIC).

43. What is the most important method of vessel inspection? 1. 2. 3. 4.

Radiographic profile surveys. Ultrasonic onstream inspections. Thermograph surveys. Careful visual survey and inspections.

44. What metals might might be subject to brittle fracture fracture even at room temperature? temperature? 1. 2. 3. 4.

Carbon Steel. Low Alloy Steel. Some Ferritic Steels. Carbon, Low Alloy, and Ferritic Steels.

45. Which of the following relief devices is intended to work with steam boilers? 1. 2. 3. 4.

Relief Valve. Safety Relief Valve. Safety Valve. Balanced Safety Relief.

46. You notice that a pressure relief relief device has a closed bonnet. What type of valve is it? 1. 2. 3. 4.

Relief Valve. Safety Relief Valve. Conventional Safety Relief Valve. Relief Valve and Conventional Safety Relief Valve.

47. While reviewing maintenance maintenance records you notice that the pre-bulged rupture disks with pressure on the concave side have been in service for three years. years. Is this O.K. why or why why not? 1. No, the recommended recommended maximum service service life for for these burst disks disks is 2 years. 2. Yes, the recommended maximum service life for these burst disks is 3 years. 3. No, the recommended recommended maximum service service life for for these burst disks disks is 1 year. 4. Yes, as long as no sign of failure has been revealed by inspection. 48. A pilot operated safety safety valve has been installed in heavy crude service service is this O.K? 1. Yes, these valves are very effective in this type of service. 2. No, these valves are not intended to operate at normal normal temperatures. temperatures. 3. Yes, these valves have closed bonnets and are leak proof. 4. Possibly not, valves may not operate properly due to deposits clogging pilot circuits.

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Closed Book API 510 Practice Exam C 49. In hydroprocessing units___________ concentration of ______________above 2% increases the potential for blistering, HIC and SOHIC. 1. 2. 3. 4.

decreasing - ammonium bisulfide increasing - aluminum silicate decreasing - ammonium peroxide increasing - ammonium bisulfide

50. A discontinuity resulting from an arc, consisting of any localized re-melted metal, heat-affected metal, or change in the surface profile of any metal object is a description of _____________________. 1. 2. 3. 4.

slag inclusion arc blow tungsten deposit an arc strike

51. An arc welding power source with a volt-ampere relationship yielding a large welding current change from a small voltage change is known as a ___________________________________. 1. 2. 3. 4.

constant current power supply current inverting power supply constant voltage power supply linear voltage power supply

52. Process conditions should be monitored to ensure that a proper pressurization sequence is followed to help prevent _______________due to temper embrittlement. 1. temper cracking 2. ductile fracture 3. polythionic cracking 4. brittle fracture 53. Increasing hardness of the metal substrate is not always a good indicator of improved resistance to __________, particularly where corrosion plays a significant role. 1. 2. 3. 4.

stress corrosion stress corrosion cracking erosion ductile failure

54. The following describes what type of construction for a pressure vessel? The cylindrical section is made up of a number of thin concentric cylinders fabricated together, one over the other, until the desired thickness is obtained. 1. 2. 3. 4.

Borland reactor wall method. Compressed ring method. Multilayer method. Multi-ring compressed wall.

55. What does the following describe? When the temperature of a vapor is reduced to the point where some or the entire vapor becomes liquid by the transfer of heat to another fluid. 1. 2. 3. 4.

Condensers. Air Cooler. Cooler Re-boiler.

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Closed Book API 510 Practice Exam C 56. What principle of cooling is used with exposed tube bundles under a cooling tower? 1. 2. 3. 4.

Conductive. Radiant. Evaporative. Isometric.

57. Which of the following are types of Air-Cooled Exchangers? 1. Induced Draft and Natural Convection. 2. Natural Flow and Forced Draft. 3. Forced Draft and Induced Draft. 4. Overhead Spray and Inverted Spray assist units. 58. If carbon steel vessels cannot resist a corrosive fluid, what method of construction is not normally used for such a vessel? 1. 2. 3. 4.

Plain carbon steel. Lined vessel using an alloy liner. Lined vessel using a refractory liner. Lined vessel using a glass liner.

59. Which of the following does not describe how metallic liners can be installed in a pressure vessel? 1. 2. 3. 4.

The liner material is explosion bonded to the carbon steel part. The liner material is rolled to the carbon steel plate as part of the manufacturing process. The liner material is welded to the carbon plate. The liner material is attached with a high temperature thermo chemical endothermic process.

60. Prior to 1930, what specification was unfired pressure vessels built to in refineries? 1. 2. 3. 4.

API/ASME Code for Unfired Pressure Vessels for Petroleum Liquids and Gases. Specifications of the user or manufacturer. Jurisdictional requirements if any existed. There were no standards or specifications prior to 1930.

61. An inspector should be familiar with the current ASME Codes and previous editions of the Code, what other publications should he be knowledgeable of? 1. 2. 3. 4.

The API Industry Informer Magazine, for the latest industry alerts. Local, state and federal regulations and other specifications for the construction of pressure vessels. ASNT rules for materials. There are no other publications to be concerned with.

62. What is the most important factor(s) in determining the inspection frequency of a pressure vessel? 1. 2. 3. 4.

Date placed in service. Rate of deterioration and remaining corrosion allowance. Remaining corrosion allowance. Rate of deterioration.

63. Faulty materials can lead to what primary problems? 1. 2. 3. 4.

Cracking, leakage, blockage, and excessive corrosion. Process upsets. Production quotas not being met. Multiple repairs.

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Closed Book API 510 Practice Exam C 64. Cracks in vessels are most likely to occur in vessels in what locations? 1. 2. 3. 4.

At sharp changes in shape, size or near weld seams. At weld seams. At attachment welds for internals. Where previous repairs have been performed.

65. Before an inspection starts in a vessel, who else besides the safety man should be informed? 1. 2. 3. 4.

Coworkers who will assist in the inspection. Operations. Repair concerns. All persons working in the area of the vessel.

66. Where will most of the cracks in a pressure vessel's steel supports be located? 1. 2. 3. 4.

In areas that are not protected from the environment. Around ladders. Around skirts. Welded seams and adjacent areas.

67. If a vessel has had previous internal inspections, what should the inspector do prior to his inspection? 1. 2. 3. 4.

Alert operations. Review API 572 for methods of failure that pertain to the vessel to be inspected. Review previous inspection records. Call the vessel manufacturer and obtain all records held on file.

68. How may cracks be made to stand out from the surrounding areas being inspected? 1. 2. 3. 4.

Highly burnishing the area. Abrasive grit blasting. Abrasive grit blasting followed by etching. Etching followed by abrasive grit blasting.

69. Who should make the decision to trepan metal from a vessel for metallurgical evaluation? 1. 2. 3. 4.

The API inspector. The API Authorized Inspector. The NBIC Authorized Inspector. Someone who knows how to analyze the problems related to repairing the sample holes.

70. How may carburized austenitic stainless steel sometimes be detected? 1. 2. 3. 4.

By chemical testing in situ. By the use of a magnet. X-ray fluorescence. Trepanning.

71. When testing a vessel pneumatically what should be on hand to aid in the visual examination? 1. 2. 3. 4.

A helper. Insulators to remove the insulation. Soap solution or ultrasonic sound detector. Acoustic emission equipment.

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Closed Book API 510 Practice Exam C 72. When leakage is encountered for the first time in a given service of an exchanger is it desirable to; 1. 2. 3. 4.

Call the manufacturer for probable locations. Determine the nature of deterioration. Reassess the need for the exchanger in the process stream. Hydrostat the exchanger as soon as possible.

73. What does the complete record file of a vessel contain? 1. 2. 3. 4.

Advance data. Shop notes. Basic data and field notes. All previous owners of the vessel.

74. What must an inspector consider when recommending the filling of pits with an epoxy? 1. 2. 3. 4.

Is this permitted by the repair concern? Will this epoxy hold up in this service? The strength the epoxy will add to base metal being repaired. What will be required to clean the pits prior to application of the epoxy?

75. The spark test is used for; 1. 2. 3. 4.

Inspection of leaks in glass, plastic or rubber linings. Determining the chemical volatility and corrosive nature of a substance. Metallurgical determination of alloys and their chemistry. Determining the chemical composition of deposit in a vessel.

76. A welder has performed a qualification test on a NPS 10 diameter pipe, the welding groove was horizontal and the pipe was vertical, this describes the position; 1. 2. 3. 4.

4G 6G 5G 2G

77. The difference between GMAW and the GTAW welding process is; 1. 2. 3. 4.

One uses alternating current and dc voltage, the other does not. Both use a consumable electrode made of tungsten and the other does not. One uses a shielding gas and the other can not. One is usually considered manual and the other semi-automatic.

78. A used vessel has been bought and moved to a new site and installed. What must the inspector do before certification of the vessel for operation? 1. 2. 3. 4.

Insure that complete set of drawings is generated noting areas of special interest. An internal inspection. Make sure that the vessel is properly supported and do a complete hydrostatic test. Witness a pneumatic pressure test.

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Closed Book API 510 Practice Exam C 79. List three places where category B welds are located in an ASME Code Section VIII Div. 1 vessel. 1. 2. 3. 4.

Longitudinal joint in shells, in nozzles and communicating chambers. Circumferential joints in transitions in diameter, connecting heads to communicating chambers and hemispherical heads to shells. Circumferential joints in transitions in diameter, connecting heads to communicating chambers and ellipsoidal heads to shells. Circumferential joints in transitions in diameter, connecting heads to communicating chambers and the joints used to make a sphere from two hemispheres.

80. Describe a Type 3 weld in accordance with ASME Section VIII Div. 1. 1. 2. 3. 4.

A weld made form one side only with a backing ring, which remains in place. A weld made form both sides, and which is restricted in diameter and thickness limits. A weld made from both sides. A weld made form one side only, which does not have a backing ring.

81. What type material is always required to have a mill test report or a certificate of compliance in accordance with Section VIII Div. 1 of the ASME Code? 1. 2. 3. 4.

ASTM pipe. ASTM forged pressure parts. Gray cast iron parts used for pressure. Plate.

82. Recording on a data sheet of an indication or condition that does not necessarily exceed the rejection criteria but in terms of code, contract or procedure will be documented as a __________________. 1. pre-rejectable indication 2. reportable indication 3. recordable indication 4. post-rejectable indication 83. You inspected a weld and it conforms to the minimum requirement's of the construction codes, but you rejected it because you learned that; 1. 2. 3. 4.

The welding procedure was too old. The welder tested in accordance with Section X not Section IX. The procedure was qualified to ASME Section IX not API 510. The procedure had not been qualified to Section IX.

84. A welding electrode has the following marking E-8018-B2. What is the appropriate F-Number for this electrode? 1. 2. 3. 4.

4 3 6 8

85. What services is a relief valve intended for? 1. 2. 3. 4.

Steam. Gases. Incompressible fluids. Water only.

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Closed Book API 510 Practice Exam C 86. A new weld repair project is just starting, as the inspector you should review the; 1. 2. 3. 4.

The repairs concerns quality plan. The procedures (WPR) (PWR). The materials chemical test reports, as they become available. Welder’s certifications, the welding procedures, and the MTRs.

87. Wire IQI s must be placed so that; 1. 2. 3. 4.

They are placed parallel to the weld metal's length. They are placed perpendicular to the length of the weld metal and across the weld. They are at 45o to the weld metal's length and placed across the weld. Wire IQI s is not allowed for weld evaluations.

88. You notice a workman applying blows to a weld with a pneumatic tool, what is he doing? 1. 2. 3. 4.

Conditioning. De-fluxing. Re-distribution of weld metal. Peening.

89. You notice that a new vessel, has had some small flat bars installed inside near an opening, these bars are most likely; 1. 2. 3. 4.

Bolmar length bars used to monitor chemical reactions. Corrosion tabs for determination of new vessel corrosion rates at that location in the vessel. Used for a dissimilar metal test. Abandoned tray clips.

90. The pulse echo contact method can be applied to any material in which ultrasonic waves will propagate at a ___________throughout the part, and from which back reflections can be obtained and resolved.

1. 2. 3. 4.

varying velocity constant velocity constant velocity with attenuation varying velocity with attenuation

91. Scored Tension-Loaded rupture disks are normally made from___________. 1. 2. 3. 4.

thinner material than the un-scored disks for the same pressure. thicker material than the un-scored disks for the same pressure. a different material than un-scored disks for the same pressure. the same thickness material as un-scored disks for the same pressure.

92. Who should be consulted with if an alteration is planned for a Section VIII Div. 1 vessel? 1. 2. 3. 4.

A professional engineer. The NBIC inspector. The department engineer over production. A pressure vessel engineer experienced in pressure vessel design.

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Closed Book API 510 Practice Exam C 93. What Codes may be used to determine a vessel's MAWP? 1. 2. 3. 4.

The latest edition of the ASME Code or the construction Code to which the vessel was built. The latest edition of the ASME Code or the edition of the ASME Code used for construction. The API 510. The alternative rules of Section VIII Div. 2.

94. Which of the following accelerates erosion in pressure vessels? 1. 2. 3. 4.

High temperature return lines. Low temperature return lines. Acidic components that are suspended in an aqueous solution. Liquid droplets in vapor streams, suspended solid particles in liquid or vapor streams.

95. A welding electrode has the following marking E-7018. Explain the meaning of the number 1 in 7018. 1. 2. 3. 4.

The first lot of 7018 electrodes produced that month at the plant. The electrodes are certified to be moisture free. The 1 determines the position of welding recommended for this electrode. First quality electrode according to the Section IX.

96. The following describes what type of relief device? The major relieving device is combined with and controlled by a self-actuated auxiliary pressure RV. 1. 2. 3. 4.

Johnson Controls bi-directional valve. Pilot operated reverse flow pressure control. Pilot operated pressure relief valve. Pilot operated check valve.

97. A spot radiograph in accordance with UW-53 has revealed rounded indications that exceed those allowed in Appendix 4 of Section VIII Div. 1. What must be done? 1. Two tracer radiographs must be performed and if they pass the area that failed in the first shot repaired and retested. 2. Nothing. 3. The entire joint must be radiographed fully. 4. Ultrasonic inspection must be performed on the entire welded joint. 98. Using the contact pulse echo method of ultrasonic thickness examination the basic formula for the instrument uses to calculate thickness is __________________________. 1. 2. 3. 4.

T = Vt/3 T = Vt/2 T = ½ Vt/3 T = ¼ Vt/2

99. A technician is spraying solvent to clean off the excess penetrant on a weld, this is O.K. if; 1. 2. 3. 4.

It is not, this is never acceptable. It is spayed in a light mist and in short bursts. It is sprayed on a lint free cloth prior to wiping the weld. It is sprayed directly on the part.

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Closed Book API 510 Practice Exam C 100. The term ‘Full Radiography’ in Section VIII Div. 1 means that a vessel must have; 1. 2. 3. 4.

100 % of its welds radiographed. All of the welds required by Code to be fully radiographed examined. 100 % of the all of the welds which exceed NPS 10 and or 1-1/8" radiographed. Radiography applied to all types of weld including fillet welds.

101. Indications observed by the dye penetrant NDE method are often larger than the actual imperfection in the material. What is the accept reject criteria based on? 1. 2. 3. 4.

The dimensions of the imperfection revealed by the inspection. The dimensions of the developed test. The dimensions of the developed test, following a written procedure. The dimension size allowed by the prevailing code.

102. Spherical vessels are usually supported by; 1. 2. 3. 4.

Steel columns attached to the shell, or by skirts. Concrete slabs. Completely supported by resting on the ground. Earthen embankments.

103. Vessels in water service are subject to maximum corrosion where; 1. 2. 3. 4.

Cooling waters are high in pH. Cooling waters are low in pH. Water temperatures are highest. Water temperatures are lowest.

104. Inspection of a reboiler used at the bottom of a tower will normally reveal the most corrosion where; 1. 2. 3. 4.

The outlet of the hot fluid is located. The inlet of the reboiler. The mid section of the reboiler. Anywhere, no particular place is worse than the other.

105. Nonmetallic linings are often used to reduce the effects of corrosion, any breaks in the lining reduce its effectiveness considerably, these breaks are sometimes referred to as; 1. 2. 3. 4.

Vacations. Holidays. Breeches. Caverns.

106. These materials exhibit an endurance limit below which fatigue cracking will not o ccur, regardless of the number of cycles. 1. 2. 3. 4.

Carbon Steel and Stainless Steel Aluminum and Selenium Titanium and Zircon Carbon Steel and Titanium

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Closed Book API 510 Practice Exam C 107. In the U.S. exchangers are manufactured to; 1. 2. 3. 4.

ADEMA ASME B31.3 API Standards 665 and 661. API Standards 660 and 661.

108. The performance of some trays in a process vessel depends on; 1. 2. 3. 4.

The weight of the fluid. The temperature of the fluid. The viscosity of the fluid. The amount of leakage occurring at the tray.

109. When inspecting internals of a catalytic reactor, the inspection will mostly consist of what? 1. 2. 3. 4.

Ultrasonic measurement. Profile radiography. Line scanning. Visual inspection with some picking and scrapping.

110. Some relief valves are manufactured using resilient O-ring seals. Which of following is a reason for these O-rings? 1. 2. 3. 4.

Resistance to chemical attack. To resist high temperature. To promote a higher degree of tightness in the sealing surfaces. To make metal parts slide easier.

111. Simmer in a relief valve is best described as; 1. 2. 3. 4.

A noise emitted when the valve opens too slowly. A noise emitted when the valve opens too rapidly. The audible or visible escape of compressible fluid between the seat and disk of the valve. A high pitched noise that varies with pressure changes.

112. What is the first step taken in the repair process when a relief valve enters the repair shop before it is dismantled? 1. 2. 3. 4.

Profiling and reference charting. Pop pressure test. Chemical cleaning and decontamination. Visual inspection.

113. Fracture toughness is defined as; 1. 2. 3. 4.

Charpy V notch. Breaking force. The amount of force required to cause a material to deform plastically. The ability to resist fracture or crack propagation under stress.

114. Decarburization may be defined as; 1. 2. 3. 4.

A loss of iron from the surface of a nonferrous alloy. A loss of carbon from the surface of a ferrous alloy. A loss of iron from the surface of a ferrous alloy. A loss of carbon from the intergranular portion of the ferrous alloy.

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Closed Book API 510 Practice Exam C 115. The most susceptible steels to graphitization are_______________________. 1. 2. 3. 4.

300 Series Stainless Steels 400 Series Stainless Steels Copper Nickel alloys carbon and carbon 1/2-molybdenum steels

116. If deciding on a technique(s) to use to inspect a vessel you must consider; 1. 2. 3. 4.

The condition of the vessel and when the last inspection was. The condition of the vessel during the last inspection. The condition of the vessel and the environment under which it operates. The latest operational data such as logs.

117. The period between internal inspections or on-stream inspections shall not exceed; 1. 2. 3. 4.

The quarter corrosion rate life. One - half the corrosion rate life The estimated remaining life of the vessel or based on the corrosion rate or 10 years which ever is less. One - half the estimated remaining life of the vessel or based on the corrosion rate or 10 years which ever is less.

118. A repair to restore missing, removed or corroded clad or overlay must be approved by; 1. 2. 3. 4.

The pressure vessel engineer. The API inspector. Both the pressure vessel engineer and the API inspector. A professional engineer.

119. For clad vessels constructed with P-3, P-4 or P-5 base materials, the base material in the area of a welded repair should be examined for cracks using; 1. 2. 3. 4.

Visual inspection. Magnetic particle inspection. Ultrasonic examination. Dye penetrant examination.

120. Dezincification can occur in copper-zinc alloys (brasses) containing less than ______when used in water service. 1. 2. 3. 4.

50% zinc 50% copper 85% zinc 85% copper

121. The spherical radius R to be used for the calculation of a standard torispherical head's corrosion in it central dished portion is; 1. 2. 3. 4.

The diameter of the shell. 80 % of the shell's diameter. The equivalent radius of the shell. 80% of the heads diameter.

122. When repairing a vessel using welding by the half-bead / temper bead technique when notch toughness is not a requirement, you may use the; 1. 2. 3. 4.

Shielded metal arc welding with the 7018 electrode only. Gas metal arc welding with S70 sold core wire only. Gas tungsten arc welding with E309 through E316 rod only. Shielded metal, Gas metal and/or Gas Tungsten arc welding processes.

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Closed Book API 510 Practice Exam C 123. During an inspection of a pressure vessel which has previously been in service, thickness measurement locations should be taken based on; 1. 2. 3. 4.

Locations during previous inspection cycles. Areas that have thinning. Areas which have the most deterioration, or if deterioration is wide spread enough readings to assure an accurate determination of the remaining thickness . Areas that have a known problem only.

124. If a vessel has a history of minor corrosion. How shall thickness measurement locations be chosen? 1. 2. 3. 4.

The shell courses and heads must have one measurements taken at the north, south, east and west compass points. One thickness measurement on each head and shell course when the vessel is small, however more measurements are advisable when the vessels are large. Each shell course and head shall have one measurement taken at 0, 90, 180, and 270 degrees. Large vessels shall have it shall 12 per shell course and 8 taken per head and nozzle.

125. Prior to a repair on a pressure vessel to its code of construction, what if any additional requirements for inspection must be met? 1. 2. 3. 4.

Jurisdictional requirements, if any, that exceeds those of the code of construction. The documentation of the repair materials should include mill test reports for all material forms. The qualifications of the repair concern performing the work must be examined in detail. The need for qualified welding procedures.

126. Jurisdictions can require that welded repairs to a pressure vessel be made by repair companies that possess; 1. 2. 3. 4.

A jurisdictional competency certification certificate. A quality control program that is in place. The “R” stamp from the National Board of Boiler and Pressure Vessel Inspectors. A license issued by the jurisdiction.

127. The hydrostatic head must be considered when rating a liquid filled vessel's; 1. 2. 3. 4.

Bottom shell course's material of construction. Top formed head's geometry. Reinforcement pad material selection. Each component MAWP.

128. A vessel is undergoing a hydrostatic test per the rules of the ASME, the pressure it shall be visually inspected at is; 1. The test pressure divided by 1.3. 2. No less than the test pressure divided by 1.3 . 3. No less than the test pressure divided by 1.1 . 4. No less than 4/5 the test pressure. 129. During the external inspection of an internally insulated vessel, you find a blister is present. The v essel operates at elevated temperatures and is in a service that might cause hydrogen attack. You feel that the blister is from hydrogen, you should; 1. 2. 3. 4.

Issue a report with the location identified. Look into the records of the vessel for previous failures. Check the fabrication details of the vessel to see if hydrogen attack is possible. Consult with a metallurgical and or a pressure vessel engineer.

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Closed Book API 510 Practice Exam C 130. A vessel due to corrosion has a remaining thickness that is below the minimum required thickness. If the thinned areas are to be evaluated for continued service using the design by analysis methods of Section VIII Division 2. When this approach is used it is always true that; 1. 2. 3. 4.

The NBIC Authorized Inspector must be consulted. Operations must agree. Consultation with a pressure vessel engineer experienced in pressure vessel design is required. The materials used in the fabrication of the vessel and their notch toughness must be known.

131. If repairs, reratings or alterations are planned to any air-cooled heat exchanger the following standard(s) in addition to API 510 should be used. 1. 2. 3. 4.

ASME Section VIII Div. 1. API Standard 661. TEMA (Tubular Exchangers Manufacturers Association). API 579.

132. A welded repair to a vessel is planned, which of the following statements does not apply to this situation? 1. 2. 3. 4.

The welding procedures must be qualified. The welders performing the work must pass a performance qualification test to Section IX. Consultation with a pressure vessel engineer may be required . The parts to be welded cannot be below 35 o F

133. Which of the following items should not be included in a fully documented quality control program for pressure relief devices? 1. 2. 3. 4.

Organizational chart, Statement of authority and responsibility, Repair and Inspection program. Organizational chart, Statement of authority and responsibility, Welding, non-destructive examination procedures and heat treatment. Organizational chart, Statement of authority and responsibility, general example o f valve’s repair name plate. The maximum set pressure for each rupture disk device.

134. As regards corrosion evaluation of a vessel part which contains a butt weld, how far on each side the weld does the welded joints efficiency E extend when performing minimum thickness required calculations? 1. 2. 3. 4.

1 inch. 1 inch or twice the minimum thickness of the weld which ever is less. 1 inch or twice the minimum thickness of the shell which ever is greater. This is not allowed the entire vessel part must be evaluated using the E of the affected butt joint.

135. When inspecting nonmetallic linings in vessels it is true that if a liner has bulged it has most likely also; 1. 2. 3. 4.

Spalled. Cracked. Segregated identifiable components. Of shingle type construction.

136. If corrosion has occurred behind a nonmetallic liner, it possible that there will be a; 1. 2. 3. 4.

Large external bulge in the vessel's outer skin. Small external bulge in the vessel's outer skin. Disbonding of the liner from the base metal of the vessel part. A very large corrosion build up on the external surface of the liner.

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Closed Book API 510 Practice Exam C 137. Excess thickness in vessel walls is common this is normally not as a result of; 1. 2. 3. 4.

Corrosion allowance. Using nominal plate sizes rather than the exact calculated thickness required. A reduction of safety valve settings or change in service. Scale accumulations.

138. Chilling coils are; 1. 2. 3. 4.

Finned coils. Pipe coils. Copper. Very long and normally found in oval shaped vessels.

139. A balanced safety relief valve uses a bellows or other means to; 1. 2. 3. 4.

Seal the valve internals. Allow for part expansion during temperature increases. Create backpressure at desired components in the valve. Minimize the effects of backpressure on the operating characteristics of the valve.

140. If heads are formed so that the pressure is on the concave side they are considered by the ASME to be; 1. 2. 3. 4.

Minus heads. Seamless. Plus heads. Spun heads.

141. A forged flat head attached to a vessel by butt welding must follow all the rules for; 1. 2. 3. 4.

Circumferential welds given in Part UW of Section VIII. Longitudinal welds given in Part UW of Section VIII. Circumferential welds given in Part UCS of Section VIII Longitudinal welds given in Part UCS of Section VIII.

142. According to API 576, rupture disks that are removed for inspection should really be; 1. 2. 3. 4.

Cleaned by an approved solvent for the service it is in. Cleaned by light wire brushing and in no case scraped. Cleaned by light scraping and then wire bushed lightly. Replaced, due to the likelihood they may fail prematurely after handling.

143. One time that the manufacturer of a pilot operated pressure relief device should be consulted about their device's setting procedure is when; 1. 2. 3. 4.

The device is very old. The device is in a non-corrosive service. The device will be set using water. The device is in corrosive service.

144. After a test and inspection cycle in a unit, pressure relief devices should not be checked for; 1. Installation of the correct device. 2. No gags or blinds left in place. 3. Seals installed to protect spring settings have not been broken. 4. Weather proof caps made of the proper material. Rev. 10 10/06


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Closed Book API 510 Practice Exam C

145. Why is it important to check a relief valve for seat tightness? 1. 2. 3. 4.

Leakage can be a hazard to the environment and leakage leads to fouled inoperable valves. Leakage leads to fouled and gate valves. Leakage leads to fouled rupture disks on the inlet. Leakage leads to fouled rupture disks on the outlet.

146. Normally when relief valves are removed from a system the inlet and outlet piping is inspected, if block valves are closed and the unit is in service what can be done to inspect this piping? 1. 2. 3. 4.

Use of special borescope, which utilizes a pressure chamber. Radiographs can be performed to indicate major fouling or blockage. Do in a hot tap in the vicinity of the suspected blockage. Probing using a high pressure sealed probing device.

147. The weld gauge in the picture above is known as _________________________. 1. 2. 3. 4.

a bridge cam gauge a hi-lo gauge an adjustable fillet weld gauge a skew T-fillet weld gauge

148. The range of inclination for the flat (1G) welder's test position, off of the horizontal axis in degrees is; 1. 2. 3. 4.

15 to 80 o 5 to 15 o 0 to 15 o 80 to 90 o

149. In the liquid penetrant process penetration time is critical. The minimum time shall be as required in; 1. 2. 3. 4.

The ASNT only. Table T-672 of Article 6 of Section V. Table T-572 of Article 5 of Section V. The API 510 Code.

Rev. 10 10/06


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Closed Book API 510 Practice Exam C 150. For welds the thickness on which a penetrameter is based is; 1. Nominal single wall thickness of the base metal. 2. Nominal single wall thickness of the base metal plus the actual thickness of the weld reinforcement. 3. Nominal single wall thickness of the base metal plus the estimated thickness of the weld reinforcement, not to exceed the maximum allowed by the referencing Code. 4. 20 % of the single wall thickness plus weld reinforcement.

Rev. 10 10/06


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Closed Book API 510 Practice Exam C ANSWERS 36. 3 37. 3 38. 3 39. 1 40. 3 41. 3 42. 3 43. 4 44. 4 45. 3 46. 4 47. 3 48. 4 49. 4 50. 4 51. 3 52. 4 53. 3 54. 3 55. 1 56. 3 57. 3 58. 1 59. 4 60. 2 61. 2 62. 2 63. 1 64. 1 65. 4 66. 4 67. 3 68. 3 69. 4 70. 2 71. 3 72. 2 73. 3 74. 2 75. 1 76. 4 77. 4 Definition of welding, semiautomatic 78. 2 79. 3 80. 4 81. 4 82. 3 83. 4 84. 3 B2 changes the A- number. not the F-number 85. 3 86. 4 Rev. 10 10/06

API 572 SECTION 11 API 572 10.9 Section V Table T-233.1 API 510 3.17 API 510 3.17 API 510 3.15 API 571 5.1.2.3 b) API 510 5.5 API 510 5.2 API 576 4.2.1 API 576 4.3 & 4.5 API 576 4.9.3 API 576 4.7.2 API 571 5.1.2.3.4 (b) API 577 3.5 definitions API 577 3.14 definitions API 571 4.2.3.7 API 571 4.2.14.3 API 572 4.2 API 572 A.1 API 572 A.3.2 API 572 A.5 API 572 4.3 API 572 4.3 API 572 SECTION 5.0 API 572 SECTION 6.0 API 572 SECTION 9.1 API 572 SECTION 8.4 API 572 SECTION 10.4.3 API 510 5.1 API 572 10.3.6 API 572 10.4.3 API 572 10.6 API 572 10.6 API 572 10.7 API 572 10.8.2 API 572 10.8.3 API 572 12.1 API 572 SECTION 11 API 572 10.4.6 IX QW-46.1.4 IX QW-492 API 510 6.1 UW-3 (b) UW-12 TABLE UG-93(a)(1) API 577 3.50 definitions SEVERAL REFERENCES IN ALL CODES IX QW-432.1 API 576 4.3.1 API 510 7.1


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Closed Book API 510 Practice Exam C 87. 2 88. 4 89. 2 90. 2 91. 2 92. 4 93. 1 94. 4 95. 3 96. 3 97. 2 98. 2 99. 3 100. 2 101. 3 102. 1 103. 2 104. 1 105. 2 106. 4 107. 4 108. 4 109. 4 110. 3 111. 3 112. 2 113. 4 114. 2 115. 4 116. 3 117. 4 118. 3 119. 3 120. 4 121. 1 122. 4 123. 3 124. 2 125. 1 126. 3 127. 4 128. 2 129. 4 130. 3 131. 2 132. 4 133. 4 134. 3 135. 2 136. 3 137. 4 138. 2 Rev. 10 10/06

V ARTICLE 2 T-277.1(d) IX QW-492 DEFINITIONS API 572 10.4.5 SE-797 1.2 API 576 4.9.1.2 API 510 7.1.1 API 510 5.4 API 571 4.2.14.1 API 577 Figure A-6 API 576 4.7 UW-52 (c)(3) SE-797 4.1 V ARTICLE 6 T-673.3 UW-11(a) VIII APPENDIX 8.4(d) API 572 4.1 API 572 8.2 API 572 10.4.3 API 572 10.4.6 API 571 4.2.16.3 (c) API 572 5 API 572 10.4.4 API 572 10.4.4 API 576 4.3 API 576 3.4.13 API 576 6.2.8 API 577 10.4.4 API 572 8.3.1 API 572 8.3.2 API 510 6.1 API 510 6.4 API 510 7.2.6 API 510 7.2.6 API 572 8.3.3 API 510 5.7 (e) API 510 7.2.3.2 API 572 10.4.4 API 572 10.4.4 API 572 11 API 572 11 : Note VIII UG-99 VIII UG-99 API 572 10.3.13 API 510 5.7 (f) API 572 A.5 API 510 7.1 thru 7.2.1 API 510 6.6 API 510 5.7(g) API 572 10.4.6 API 572 10.4.6 API 572 10.9 API 572 A.6.3.3 DTM Enterprises Technical Training Division 281-330-9542 – www.DTM-Enterprises.org

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Closed Book API 510 Practice Exam C 139. 4 140. 3 141. 1 142. 4 143. 3 144. 4 145. 1 146. 2 147. 3 148. 3 149. 2 150. 3

Rev. 10 10/06

API 576 4.6 VIII UG -32 NOMEMCLATURE VIII UG- 34 API 576 4.9.3 : Caution Note API 576 5.4 API 576 6.3 API 576 6.2.15: Caution Note API 576 6.2.6 API 577 9.3.2.3 Figure 15 IX QW-461 V ARITCLE 6 T-672 V ARTICLE 2 T-276.2 (a)


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API 510 Closed Exam

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