510 Practice Exam _5 CB Questions.pdf with correct detailed answers guaranteed pass

Material used in making repairs or alterations shall conform to the: a) Applicable construction Code b) ASME Code. c) AWS standards. d) ASTM standards. - Correct Answers Applicable construction Code Which of the following correctly states the steps that would most likely be performed during external inspection of a pressure vessel that is completely insulated and operates at 450°F (232°C)? a) No examination of insulation is necessary due to high operating temperature. b) Visual examination is necessary only if the vessel has not operated continuously. c) Visual external inspection of insulation is normally sufficient. d) The inspection would include visual inspection of insulation, removal of insulation at low spots or where moisture can collect, and thermography of hard-to-reach areas. - Correct AnswersVisual external inspection of insulation is normally sufficient. If a vessel's largest nozzle is a reinforced NPS 10 (DN 250) nozzle, then an alteration is adding a/an: a) reinforced nozzle of any size less than NPS 10 (DN 250). b) nozzle that does not require reinforcement. c) NPS 10 (DN 250) reinforced nozzle. d) NPS 12 (DN 300) reinforced nozzle. - Correct AnswersNPS 12 (DN 300) reinforced nozzle. The ASME Code recommends that welding not be performed when the base metal temperature is lower than: a) 0°F (-18°C). b) 10°F (-12°C). c) 32°F (0°C). d) 60°F (16°C). - Correct Answers0°F (-18°C). When a nozzle is inspected and evidence of distortion is found, all weld seams in the: a) shell in the area of the nozzle should be examined for deformation. b) nozzle and shell in the area of the nozzle should be examined for cracks. c) nozzle and shell in the area of the nozzle should be examined for deformation. d) nozzle should be examined for cracks. - Correct Answersnozzle and shell in the area of the nozzle should be examined for cracks. A vessel has a single corrosion rate of 0.012 inch per year (0.305 mm/year). The minimum vessel required thickness for both the shell and the heads is 0.6875 inch (17.5 mm). The actual thickness of the head is 0.9375 inch (23.8 mm) and the shell is 1.10 inch (27.9 mm). What is the vessels remaining life? a) 7.5 years b) 10.5 years c) 21 years d) 30 years - Correct Answers21 years A pressure vessel currently in operation has an established corrosion rate of 0.001 inch per year (0.025 mm/year) and no history of localized corrosion. One corrosion monitoring location (CML) is established on each head and on one nozzle in the bottom head. Engineering has approved a change of service, expecting a corrosion rate of 0.010 inch per year (0.254 mm/year) and that the new service will promote localized corrosion in the bottom third of the vessel. An authorized pressure vessel inspector considering adjusting the number and location of CMLs should: a) increase the number of CMLs for the bottom head, shell, and nozzles in the area where localized corrosion is expected to occur. b) increase the number of CMLs only in the spot where localized corrosion is expected to occur. c) increase the number of CMLs after the next scheduled internal inspection based on the new service conditions. d) do nothing; the numb - Correct Answersincrease the number of CMLs for the bottom head, shell, and nozzles in the area where localized corrosion is expected to occur. During an internal inspection, which of the following nondestructive examination (NDE) techniques would be most sensitive for detecting the internal deterioration on a carbon steel vessel that is in caustic service at a pressure of 50 psig (0.345 MPa) and 150ºF (66ºC) that has not been stress-relieved? a) Digital ultrasonic testing b) Radiographic testing c) Wet fluorescent magnetic-particle testing d) Dye-penetrant testing - Correct AnswersWet fluorescent magnetic-particle testing The ability of a metal to absorb energy and deform plastically before fracturing is known as: a) ductile-to-brittle transition. b) plasticity. c) tensile strength. d) toughness. - Correct Answerstoughness. For in-service vessels where a conflict exists between the ASME Code and the API 510 Code, the: a) ASME Code takes precedence. b) API 510 Code takes precedence. c) applicable code, as determined by the owner/user of the pressure vessel, takes precedence. d) applicable code, as determined by the authorized pressure vessel inspector, takes precedence. - Correct AnswersAPI 510 Code takes precedence. For a large vessel with two or more zones of differing corrosion rates: a) the complete vessel may be treated as a single zone, using the average corrosion rate of all sections. b) each zone may be treated independently regarding the interval between inspections. c) the complete vessel space must be inspected using the inspection interval for the section with the highest corrosion rate. d) each zone must be inspected using the shortest inspection interval required among all of the sections. - Correct Answerseach zone may be treated independently regarding the interval between inspections. A 50-foot-tall (15420-mm-tall) water-filled pressure vessel has an MAWP of 275 psi (1.90 MPa). What pressure must the bottom head of the vessel be designed for? (1 foot of water = 0.433 psi (1000 mm of water = 0.00978 MPa)] a) 253 psi (1.74 MPa) b) 275 psi (1.90 MPa) c) 297 psi (2.05 MPa) d) 358 psi (2.47 MPa) - Correct Answers297 psi (2.05 MPa) Engineering is considering using a carbon-steel, un-insulated pressure vessel that has been in storage for several years. Inspection records indicate that the vessel has experienced no corrosion, but that it had been involved in a fire shortly before it was taken out of service. Which of the following inspection methods, besides visual, should the inspector use to determine the condition of the vessel? a) Ultrasonic shear wave b) Magnetic particle and eddy current Hardness testing c) Hardness test d) Dye-penetrant and hammer testing - Correct AnswersHardness test Which tests are always used in qualifying a groove-weld procedure? a) Tension and Charpy b) Tension and bend c) Radiographic and bend d) Radiographic and ultrasonic - Correct AnswersTension and bend A vessel put into service today is susceptible to carbon dioxide corrosion, since the carbon dioxide in the process may dissolve in the water to form carbonic acid. Where would be the best place to locate the corrosion monitoring locations (CMLs)? a) At the bottom and top heads b) Throughout the vessel, as the mechanism is unpredictable c) At areas of anticipated water wetting and weld seams for preferential corrosion d) At the gas/liquid interface - Correct AnswersAt areas of anticipated water wetting and weld seams for preferential corrosion Calculations by the original manufacturer or an owner/user engineer shall be completed before: a) thickness measurements are evaluated. b) re-rating the vessel. c) acceptance of welding procedures and welder qualification. d) repairing a portion of the vessel due to corrosion. - Correct Answersre-rating the vessel. A low energy value on a test for notch toughness indicates that a metal is: a) ductile. b) elastic. c) brittle. d) low strength. - Correct Answersbrittle. A vessel is inspected after 5 years of service, and the thinnest part of the shell is found to be 1.410 inches (35.8 mm). If the original thickness was 1.5625 inches (39.7 mm) and the minimum required thickness is 1.232 inches (31.3 mm), what thickness of material is available for the remaining corrosion allowance? a) 0.028 inch (.711 mm) b) 0.077 inch (2.0 mm) c) 0.178 inch (4.5 mm) d) 0.206 inch (5.2 mm) - Correct Answers0.178 inch (4.5 mm) Which of the following is most important to document when performing risk-based inspection assessments? a) Deficiencies or recommendations for repair for continued service until repairs are completed b) Repairing, altering, and re-rating information c) Construction and design, along with operating and inspection history d) All factors contributing to the likelihood and consequences of a failure - Correct AnswersAll factors contributing to the likelihood and consequences of a failure Which of the following is most likely to result from improper heat treating? a) Low residual stress b) Lack of penetration c) High residual stress d) Weld shrinkage - Correct AnswersHigh residual stress When long-term and short-term corrosion rates are different, the remaining life should be determined: a) at the discretion of the inspector. b) using the rate that reflects the current process conditions. c) using the rate that gives the shortest remaining life. d) using the rate that gives the longest inspection interval. - Correct Answersusing the rate that reflects the current process conditions. An inspection plan for pressure vessels operating at elevated temperatures shall be prepared in consultation with a/an: a) safety engineer. b) pressure-vessel engineer. c) corrosion specialist. d) pressure-vessel inspector experienced in vessels operating at elevated temperatures. - Correct Answerscorrosion specialist. A pressure vessel has been in non-continuous service for 15 years. During this time, it has been filled three times for 2 years at a time; then internally inspected. The last internal inspection determined that the vessel had 9 years of remaining life. The next inspection is due: a) before 4.5 years of actual service. b) before 5 years of actual service. c) before 9 years of actual service. d) before a maximum of 10 years of actual service. - Correct Answersbefore 4.5 years of actual service. In the development of an inspection plan for corrosion under insulation, the first step is to: a) perform a visual inspection and look for wet insulation. b) create a structured and systematic approach utilizing prediction/analysis tools. c) de-lag all suspected insulation. d) de-lag only equipment operating between 212°F and 250°F (100°C and 121°C). - Correct Answerscreate a structured and systematic approach utilizing prediction/analysis tools. In re-rating a pressure vessel, the re-rating is considered complete when: a) the inspector witnesses the attachment of an additional nameplate or stamping. b) all re-rating calculations are reviewed and approved by the API-authorized pressure vessel inspector. c) the pressure vessel engineer performing the re-rating oversees the attachment of an additional re-rating nameplate to the vessel. d) an additional nameplate is attached to the vessel wall by welding, and the re-rating record is approved by the vessel owner/user. - Correct Answersthe inspector witnesses the attachment of an additional nameplate or stamping. When performing a weld repair on a section of stainless-steel weld overlay on a carbon-steel vessel in hydrogen service, which of the following is most important? a) Magnetic-particle testing of the overlay b) Brinell hardness testing of the overlay c) Out-gassing of the base metal d) Impact testing of the base metal - Correct AnswersOut-gassing of the base metal All of the following are types of corrosion except: a) wet H2S cracking. b) cavitation. c) dezincification. d) biological attack. - Correct Answerscavitation. A welder has qualified in the 1G position with a groove weld in plate. The position he is qualified to weld in is: a) horizontal. b) flat. c) overhead. d) vertical. - Correct Answersflat. When dial-type indicating pressure gauges are used during a vessel hydrostatic test, the maximum gauge range shall not exceed: a) 1 ½ times the test pressure. b) 2 ½ times the test pressure. c) 3 times the test pressure. d) 4 times the test pressure. - Correct Answers4 times the test pressure. During radiographic examination of a weld, the wire type IQI shall be placed: a) adjacent to the weld so that the length of the wire is perpendicular to the weld. b) adjacent to the weld so that the length of the wire is parallel to the weld. c) on the weld so that the length of the wire is perpendicular to the weld. d) on the weld so that the length of the wire is parallel to the weld. - Correct Answerson the weld so that the length of the wire is perpendicular to the weld. Tests conducted to qualify a welding procedure are documented by the procedure qualification record (PQR). Responsibility for these tests rest with: a) the organization performing the welding. b) the plate manufacturer or supplier. c) an independent testing laboratory. d) the owner/operator. - Correct Answersthe organization performing the welding. A vessel has been in service for 8 years, the original shell thickness was 1.5 inches (38.1 mm) and the vessel was 100% radiographed at construction. If the required shell thickness is 1.125 inches (28.6 mm), and the measured thickness after 8 years of service is 1.250 inches (31.8 mm), what is the remaining life of this vessel? a) 2 years b) 4 years c) 0.4 years d) 0.2 years - Correct Answers4 years When warranted by process, equipment, or consequence changes, a risk-based inspection (RBI) assessment shall be reviewed and approved at intervals not to exceed a maximum of: a) 3 years. b) 5 years. c) 10 years. d) 15 years. - Correct Answers10 years. Inspection records contain the following information for a particular corrosion monitoring location: Thickness | Year of Operation 0.625 inch (15.9 mm) | 0 (New) 0.575 inch (14.6 mm) | 5 0.550 inch (13.9 mm) | 10 (Current) What is the short-term corrosion rate for the location? a) 0.0025 inch per year (0.07 mm/year) b) 0.0050 inch per year (0.13 mm/year) c) 0.0075 inch per year (0.19 mm/year) d) 0.0 100 inch per year (0.25 mm/year) - Correct Answers0.0050 inch per year (0.13 mm/year) What is the cause for rejection of a radiograph due to a "B" image on a film? a) Any "B" image b) No image c) A light "B" image d) A dark "B" image - Correct AnswersA light "B" image If solid particles are suspected to be in a process flowing through a pressure vessel nozzle, the inspector should check for: a) localized erosion. b) general pitting. c) general corrosion. d) localized