JUNE 2025 Practice Questions API 570 Questions and Answers correct

JUNE 2025 Practice Questions API 570 Questions and Answers correct API 570 covers inspection, repair, alteration, and rerating procedures for metallic piping systems that_______________________. a. are being fabricated. b. does not fall under ASTM B31.3. c. have been in-service. d. has not been tested. C API 570 was developed for the petroleum refining and chemical process industries. a. It shall be used for all piping systems. b. It may be used, where practical, for any piping system. c. It can be used, where necessary, for steam piping. d. It may not be used unless agreed to by all parties. B API 570 ________ be used as a substitute for the original construction requirements governing a piping system before it is placed in-service. a. shall not b. should c. may d. can A API 570 applies to piping systems for process fluids, hydrocarbons, and similar flammable or toxic fluid services. Which of the following services is not specifically applicable? a. Raw, intermediate, and finished petroleum products. b. Water, steam condensate, boiler feed water. c. Raw, intermediate, and finished chemical products. d. Hydrogen, natural gas, fuel gas, and flare systems. B Some of the classes of piping systems that are excluded or optional for coverage under API 570 are listed below. Which one is a mandatory included class? a. Water. b. Catalyst lines. c. Steam. d. Boiler feed water. B The _________ shall be responsible to the owner-user for determining that the requirements of API 570 for inspection, examination, and testing are met. a. Piping Engineer. b. Inspector. c. Repair Organization. d. Operating Personnel. B Who is responsible for the control of piping system inspection programs, inspection frequencies, and maintenance of piping? a. Authorized Piping Inspector. b. Owner-User. c. Jurisdiction. d. Contractor. B An Authorized Piping Inspector shall have the following qualifications. Pick the one that does not belong in this list. a. Four years of experience inspecting in-service piping systems. b. High school education plus 3 years of experience in the design, construction, repair, operation, or inspection of piping systems. c. Two year certificate in engineering or technology plus 2 years of experience in the design, construction, repair, operation, or inspection of piping systems. d. Degree in engineering plus one year experience in the design, construction, repair, operation, or inspection of piping systems. A Risk Based Inspections include which of the following: a. Likelihood assessment. b. Consequence analysis. c. Operating and Inspection histories. d. All of the above. D An RBI assessment can be used to alter the inspection strategy provided: a. The degradation methods are identified. b. The RBI is fully documented. c. A third party conducts the RBI. d. Both A & B above. D Which one of the following is not a specific type or an area of deterioration? a. Rectifier performance. b. Injection points. c. Deadlegs. d. Environmental cracking. A Injection points subject to accelerated or localized corrosion may be treated as ________. a. the focal point of an inspection circuit. b. separate inspection circuits. c. piping that must be renewed on a regular schedule. d. locations where corrosion inhibitors must be used. B The recommended upstream limit of inspection of an injection point is a minimum of: a. 12 feet or 3 pipe lengths whichever is smaller. b. 12 inches or 3 pipe diameters whichever is smaller. c. 12 inches or 3 pipe diameters whichever is greater. d. 12 feet or 3 pipe lengths whichever is greater. C The recommended downstream limit of inspection of an injection point is a minimum of: a. second change in flow direction past the injection point, or 25 feet beyond the first change in flow direction whichever is less. b. second change in flow direction past the injection point, or 25 feet beyond the first change in flow direction whichever is greater. c. second change in flow direction past the injection point, or 25 inches beyond the first change in flow direction whichever is less. d. second change in flow direction past the injection point, or 25 inches beyond the first change in flow direction whichever is greater. A Select thickness measurement locations (TMLs) within injection point circuits subject to localized corrosion according to the following guidelines. Select the one that does not belong. a. Establish TMLs on appropriate fittings within the injection point circuit. b. Establish at least one TML at a location at least 25 feet beyond the downstream limit of the injection point. c. Establish TMLs on the pipe wall at the location of expected pipe wall impingement or injected fluid. d. Establish TMLs at both the upstream and downstream limits of the injection point circuit. B What are the preferred methods of inspecting injection points? a. Radiography and/or ultrasonics. b. Hammer test and/or radiograph. c. Ultrasonics and/or liquid penetrant. d. Liquid penetrant and/or eddy current. A During periodic scheduled inspections, more extensive inspection should be applied to an area beginning __________ upstream of the injection nozzle and continuing for at least __________ pipe diameters downstream of the injection point. a. 10 inches, 20 b. 12 feet, 10 c. 12 inches, 10 d. 10 feet, 10 C Why should deadlegs in piping be inspected? a. API 510 mandates the inspection of deadlegs. b. Acid products and debris build up in deadlegs. c. The corrosion rate in deadlegs can vary significantly from adjacent active piping. d. Caustic products and debris build up in deadlegs. C Both the stagnant end and the connection to an active line of a deadleg should be monitored. In a hot piping system, why does the high point of a deadleg corrode and need to be inspected? a. corrosion occurs due to directed currents set up in the deadleg. b. erosion occurs due to convective currents set up in the deadleg. c. corrosion occurs due to convective currents set up in the deadleg. d. erosion occurs due to directed currents set up in the deadleg. C What is the best thing to do with deadlegs that are no longer in service? a. Ultrasonically inspect often. b. Radiograph often. c. Inspect often. d. Remove them. D What are the most common forms of corrosion under insulation (CUI). a. localized corrosion of nonferrous metals and chloride stress corrosion cracking of carbon steel. b. localized corrosion of chrome-moly steel and chloride stress corrosion cracking of ferritic stainless steel. c. localized corrosion of carbon steel and chloride stress corrosion cracking of austenitic stainless steel. d. localized corrosion of nickel-silicon alloy and caustic stress corrosion of austenitic stainless steel. C What climatic area may require a very active program for corrosion under insulation? a. Cooler northern continent locations. b. Cooler drier, midcontinent locations. c. Warmer, marine locations. d. Warmer drier, desert locations. C Certain areas and types of piping systems are potentially more susceptible to corrosion under insulation. Which of the items listed is not susceptible to CUI? a. Areas exposed to mist overspray from cooling water towers. b. Carbon steel piping systems that normally operate in-service above 250 degrees but are in intermittent service. c. Deadlegs and attachments that protrude from insulated piping and operate at a different temperature than the temperature of the active line. d. Carbon steel piping systems, operating between 250 degrees F and 600 degrees F. D What location is subject to corrosion under insulation and inspection contributes to it. a. Locations where pipe hangers and other supports exist. b. Locations where insulation has been stripped to permit inspection of the piping. c. Locations where insulation plugs have been removed to permit piping thickness measurements. d. Locations where there is damaged or missing insulation jacketing. C Soil-to-air (S/A) interfaces for buried piping are a location where localized corrosion may take place. If the buried part is excavated for inspection, how deep should the excavation be to determine if there is hidden damage? a. 12 to 18 inches. b. 6 to 12 inches. c. 12 to 24 inches. d. 6 to 18 inches. B At concrete-to-air and asphalt-to-air interfaces of buried piping without cathodic protection, the inspector should look for evidence that the caulking or seal at the interface has deteriorated and allowed moisture ingress. If such a condition exists on piping systems over ______ years old, it may be necessary to inspect for corrosion beneath the surface before resealing the joint. a. 8 b. 5 c. 15 d. 10 D An example of service-specific and localized corrosion is: a. Corrosion under insulation in areas exposed to steam vents. b. Unanticipated acid or caustic carryover from processes into non-alloyed piping. c. Corrosion in deadlegs. d. Corrosion of underground piping at soil-to-air interface where it ingresses or egresses. B Erosion can be defined as: a. galvanic corrosion of a material where uniform losses occur. b. removal of surface material by action of numerous impacts of solid or liquid particles. c. gradual loss of material by a corrosive medium acting uniformly on the material surface. d. pitting on the surface of a material to the extent that a rough uniform loss occurs. B A combination of corrosion and erosion results in significantly greater metal loss than can be expected from corrosion or erosion alone. This type of loss occurs at: a. high-velocity and high-turbulence areas. b. areas where condensation or exposure to wet hydrogen sulfide or carbonates occur. c. surface-to-air interfaces of buried piping. d. areas where gradual loss of material occurs because of a corrosive medium. A Environmental cracking of austenitic stainless steels is caused many times by: a. exposing areas to high-velocity and high-turbulence streams. b. excessive cyclic stresses that are often very low. c. exposure to chlorides from salt water, wash-up water, etc. d. creep of the material by long time exposure to high temperature and stress. C When the inspector suspects or is advised that specific piping circuits may be susceptible to environmental cracking the inspector should: a. call in a Piping Engineer for consultation. b. investigate the history of the piping circuit. c. obtain advise from a Metallurgical Engineer. d. schedule supplemental inspections. D If environmental cracking is detected during internal inspection of pressure vessels, what should the Inspector do? a. The Inspector should designate appropriate piping spools upstream and downstream of the vessel to be inspected if piping is susceptible to environmental cracking. b. The Inspector should consult with a Metallurgical Engineer to determine the extent of the problems. c. The Inspector should review the history of adjacent piping to determine if it has ever been affected. d. The Inspector should consult with a Piping Engineer to determine the extent of the problems. A If external or internal coatings or refractory liners on a piping circuit are in good condition, what should an inspector do? a. After inspection, select a portion of the liner for removal. b. The entire liner should be removed for inspection. c. Selected portions of the liner should be removed for inspection. d. After inspection, if any separation, breaks, holes or blisters are found, it may be necessary to remove portions of the lining to determine the condition under it. D What course of action should be followed if a coating of coke is found on the interior of a large pipe off a reactor on a Fluid Catalytic Cracking Unit. a. Determine whether such deposits have active corrosion beneath them. If corrosion is present, thorough inspection in selected areas may be required. b. The coke deposits should be removed from the area for inspection. c. The coke deposits may be ignored -- the deposits will probably protect the line from corrosion. d. Consult with a Process Engineer and a Metallurgist on the necessity of removing the coke deposits. A Fatigue cracking of piping systems may result from: a. embrittlement of the metal due to it operating below its transition temperature. b. erosion or corrosion/erosion that thin the piping where it cracks. c. excessive cyclic stresses that are often well below the static yield strength of the material. d. environmental cracking caused by stress corrosion due to the presence of caustic, amine, or other substance. C Where can fatigue cracking typically be first detected? a. At points of low-stress intensification such as reinforced nozzles. b. At points of high-stress intensification such as branch connections. c. At points where cyclic stress are very low. d. At points where there are only bending or compressive stresses. B What are the preferred NDE methods for detecting fatigue cracking. a. Eddy current testing, ultrasonic A-scan testing, and/or possibly hammer testing. b. Liquid penetrant testing, magnetic particle testing and/or possibly acoustic emission testing. c. Visual testing, eddy current testing and/or possibly ultrasonic testing. d. Acoustic emission testing, hydro-testing, and/or possibly ultrasonic testing. B Creep is dependent on: a. time, temperature, and stress. b. material, product contained, and stress. c. temperature, corrosive medium, and load. d. time, product contained, and load. A An example of where creep cracking has been experienced in the industry is in the problems experienced with cracking of 1.25% Chrome steels operating at temperatures above _________ degrees F. a. 500 b. 900 c. 1000 d. 1200 B Brittle fracture can occur in carbon, low-alloy, and other ferritic steels at or below _______ temperatures. a. 140 degree b. ambient c. 100 degree d. 30 degree B Water and aqueous solutions in piping systems may freeze and cause failure because of the: a. expansion of these materials. b. contraction of these materials. c. constriction of these materials. d. decrease of these materials. A Different types of inspection and surveillance are appropriate depending on the circumstances and the piping system. Pick the one that does not belong in the following list. a. Internal and external visual inspection. b. Thickness measurement inspection. c. Vibrating piping inspection. d. Chemical analysis inspection. D Internal visual inspections are __________ on piping unless it is a large diameter transfer line, duct, catalyst line or other large diameter piping system. a. the most effective inspection b. the most useful means of inspection c. not normally performed d. the major means of inspection C Name an additional opportunity for a normal non-destructive internal inspection of piping. a. When the piping fails and the interior is revealed. b. When maintenance asks for an internal inspection. c. When piping flanges are disconnected. d. When a fire occurs and the pipe is in the fire. C Why is thickness measurement inspection performed? a. To satisfy jurisdictional requirements. b. To determine the internal condition and remaining thickness of the piping components. c. To determine the external condition and amount of deposits inside the piping. d. To satisfy heat transfer requirements of the piping. B Who performs a thickness measurement inspection? a. The operator or control man. b. The Inspector or examiner. c. The maintenance workers or supervisor. d. The Jurisdiction or OSHA. B When corrosion product buildup is noted during an external visual inspection at a pipe support contact area lifting off such supports may be required for inspection. When doing this, care should be: a. exercised if the piping is in-service. b. used when determining the course of action. c. practiced so as not to disturb the supports. d. taken that a complete record of the problem is made. A Qualified operating or maintenance personnel also may conduct external visual inspections, when: a. satisfactory to the owner-user. b. acceptable to the inspector. c. agreeable to the maintenance supervisor. d. permissible to the operation supervisor. B Who would normally report vibrating or swaying piping to engineering or inspection personnel? a. Operating personnel. b. Maintenance personnel. c. Jurisdictional personnel. d. OSHA personnel. A Thermography is used to check for: a. vibrating sections of the piping system. b. detecting localized corrosion in the piping system. c. abnormal thermal expansion of piping systems. d. hot spots in refractory lined piping systems. D Thickness measurement locations (TMLs) are specific ________ along the piping circuit where inspections are to be made. a. points b. areas c. items d. junctures B The minimum thickness at each TML can be located by: a. electromagnetic techniques. b. ultrasonic scanning or radiography. c. hammer testing. d. MT and/or PT. B Where appropriate, thickness measurements should include measurements at each of _________ on pipe and fittings. a. two quadrants b. three locations c. four quadrants d. six points C Where should special attention be placed when taking thickness measurements of an elbow? a. The outlet end. b. The inlet end. c. The inside and outside radius. d. The sides. C TMLs should be marked on inspection drawings and __________________ to allow repetitive measurements. a. on the inspectors notes b. on a computer system c. on the piping system d. on maintenance department charts C What is taken into account by an experienced inspector when selecting TML's? a. The amount of corrosion expected. b. The patterns of corrosion that would be expected. c. The number and the cost of reading the TMLs. d. Whether the TML's are easily accessed. B In theory, a piping circuit subject to perfectly uniform corrosion could be adequately monitored with ______ TML/s. a. 1 b. 2 c. 3 d. 4 A More TML's should be selected for piping systems with any of the following characteristics: a. Low potential for creating a safety or environmental emergency in the event of a leak. b. More complexity in terms of fittings, branches, deadlegs, injection points, etc. c. Relatively non-corrosive piping systems. d. Long, straight-run piping systems. B Fewer TML's can be selected for piping systems with any of the following characteristics: a. More complexity in terms of fittings, branches, deadlegs, injection points, etc. b. Higher expected or experienced corrosion rates. c. Long, straight-run piping systems. d. Higher potential for localized corrosion. C TML's can be eliminated for piping systems with the following characteristics: a. Higher potential for creating a safety or environmental emergency in the event of a leak. b. Low potential for creating a safety or environmental emergency in the event of a leak. c. Extremely low potential for creating a safety or environmental emergency in the event of a leak. d. More complexity in terms of fittings, branches, deadlegs, injection points, etc. C What is usually the most accurate means for obtaining thickness measurements on installed pipe larger than NPS 1? a. MT b. UT c. PT d. ET B What thickness measuring technique does not require the removal of some external piping insulation? a. AE b. UT c. ET d. RT D When ultrasonic thickness measurements are taken above ________ degrees F., instruments couplants, and procedures should be used that will result in accurate measurements at the higher temperature. a. 150 b. 175 c. 200 d. 250 A Typical digital thickness gages may have trouble measuring thicknesses less than a. 0.2188 b. 0.1875 c. 0.1562 d. 0.1250 D When pressure testing of piping systems are conducted they shall be performed in accordance with the requirements of: a. ASME B31.3. b. ASME B&PV Code, Section VIII. c. ASA B16.5 d. API 510 A If a lower pressure test (lower than prescribed by code) is used only for tightness of piping systems, the _______ may designate the pressure. a. owner-user b. inspector c. jurisdiction d. contractor A The preferred medium for a pressure test is ______. a. steam b. air c. water d. hydrocarbon C If a non-toxic hydrocarbon (flammable) is used as the test medium, the liquid flash point shall be at least ______ degrees F. or greater. a. 95 b. 100 c. 110 d. 120 D Piping fabricated of or having components of 300 series stainless steel should be tested with _________. a. water with a pH of 4 b. water with a pH of 6. c. water with a chloride content of less than 400 ppm chlorides. d. steam condensate. D For sensitized austenitic stainless steel piping subject to polythionic stress corrosion cracking, consideration should be given to using _________ for pressure testing. a. an acidic-water solution b. an alkaline-water solution c. a water with a pH of 5 d. a water with a pH of 4 B When a pipe requires post weld heat treatment, when should the pressure test be performed. a. During heat treatment. b. Before any heat treatment. c. After any heat treatment. d. No test is required. C During a pressure test, where the test pressure will exceed the set pressure of the safety relief valve or valves on a piping system the safety relief valve or valves should be ______________ when carrying out the test. a. altered by screwing down on the adjusting screw b. reset to exceed the test pressure c. checked or tested d. removed or blanked D If block valves are used to isolate a piping system for a pressure test, what precaution should be taken? a. Do not use a globe valve during a test. b. Make sure the packing gland of the valve is tight. c. Do not exceed the permissible seat pressure of the valve. d. Check the bonnet bolts to make sure they are tight. C Several methods may be used to verify that the correct alloy piping is in a system. Which of the following methods may be used: a. 100% verification b. PMI testing c. sampling a percentage of materials d. any of the above may be used D Name a part of a piping system that thickness measurements are not normally routinely taken. a. elbows b. expansion loops c. tees d. valves D If environmental cracking is found during in-service inspection of welds, who should conduct the untrasonic shear wave examination, if required? a. Owner-user. b. Inspector. c. Industry-qualified UT Examiner (after 2003). d. Industry-qualified inspection-engineers. C If an Inspector finds an imperfection in an original fabrication weld and analysis is required to assess the impact of the weld quality on piping integrity, which of the following may perform the analysis? a. An API 510 Inspector, a WPS Inspector, a Pressure Vessel Engineer. b. An API 570 Inspector, a CWI Inspector, a Piping Engineer. c. An Owner-User, a B31.3 Inspector, an Industrial Engineer. d. A Jurisdictional Representative, a API 574 Inspector, an Chemical Engineer. B According to API 570, some welds in a piping system that has been subjected to radiography according to ASME B31.3: a. will meet random radiograph requirements, and will perform satisfactorily in-service without a hydrotest. b. will not meet random radiograph requirements, and will not perform satisfactorily in-service even though hydrotested. c. will meet random radiograph requirements, and will not perform satisfactorily in-service after a hydrotest. d. will not meet random radiograph requirements, but will still perform satisfactorily in-service after being hydrotested. D How should fasteners and gaskets be examined to determine whether they meet the material specifications. a. All fasteners and gaskets should be checked to see if their markings are correct according to ASME and ASTM standards. b. A representative sample of the fasteners and gaskets should be checked to see if their markings are correct according to ASME and ASTM standards. c. Purchase records of all fasteners and gaskets should be checked to see if the fasteners and gaskets meet ASME and ASTM standards. d. A representative sample of the purchase records of fasteners and gaskets should be checked to see if the fasteners and gaskets meet ASME and ASTM standards. B When checking flange and valve bonnet bolts for corrosion, what type of NDT is usually used? a. RT b. UT c. VT d. AE C What course of action is called for when an inspector finds a flange joint that has been clamped and pumped with sealant? a. Disassemble the flange joint; Renew the fasteners and gaskets. The flanges may also require renewal or repair. b. Renew all the fasteners and renew the gasket if leakage is still apparent. c. Check for leakage at the bolts; if repumping is contemplated, affected fasteners should be renewed. d. No action is required since the joint has been pumped with a sealant. C All process piping systems must be categorized into different classes. On what are the classifications selection based? a. Requirements of jurisdiction and the proximity of population areas. b. Potential safety and environmental effects should a leak occur. c. Liability to the owner-user and the requirements of the jurisdiction. d. Access to the systems for inspection and closeness to population areas. B Listed below are several examples of a CLASS 1 piping system. Which one does not belong? a. Anhydrous hydrogen chloride. b. Hydrofluoric acid. c. Piping over or adjacent to water and piping over public throughways. d. Distillate and product lines to and from storage and loading. D Of the three classification of piping systems, which includes the majority of unit process and selected off-site piping? a. Class 3 b. Combination of classes 1 and 2 c. Class 1 d. Class 2 D Class 3 piping is described as being in services: a. with the highest potential of resulting in an immediate emergency if a leak occurs. b. that are flammable but do not significantly vaporize when they leak and are not located in high-activity areas. c. that are not flammable and pose no significant risk to populated areas. d. that are not in classes 1 and 2. B Who establishes inspection interval for thickness measurements, external visual inspections and for internal and supplemental inspections? a. Piping Engineer. b. Owner-user or the Inspector. c. Chemical Engineer. d. Piping Engineer and the Jurisdiction. B Thickness measurement inspection should be scheduled based on the calculation of not more than: a. one half the remaining life determined from corrosion rates or the maximum interval of 5 years whichever is shorter. b. one half the remaining life determined from corrosion rates or the maximum interval allowed by API 570 in Table 1, whichever is shorter. c. one fourth the remaining life determined from corrosion rates or the maximum interval of 10 years whichever is shorter. d. one quarter the remaining life determined from corrosion rates or the maximum interval allowed by API 570 in Table 1, whichever is shorter. B For External inspections for potential corrosion under insulation (CUI) on Class 1 systems, the examination should include at least _____ percent of all suspect areas and _____ percent of all areas of damaged insulation. a. 50, 75 b. 50, 33 c. 75, 50 d. 25, 10 A Piping systems that are known to have a remaining life of over ______ years or that are protected against external corrosion need not have insulation removed for the periodic external inspection. a. 10 b. 15 c. 5 d. 20 A