Top 115 Latest API 570 Exam Questions and Answers – ALL QUESTIONS ARE CLOSED BOOK Question
115 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 sheet to keep this copy clean for future studies.
Here are the answer keys:
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Q1. When preparing to inspect a piping system, inspection personnel should:
A. Check that repair materials are available
B. Briefly review the history of individual piping systems before inspection
C. Consult only with the corrosion engineer
D. Begin inspection without reviewing records
Correct Answer: B
Explanation: Previous inspection history helps identify known damage mechanisms, corrosion rates, repairs, and areas needing special attention.
Q2. As regards dead legs in piping circuits, what does API 570 recommend whenever possible?
A. Monitor all dead legs monthly
B. Inspect only dead legs selected by operations
C. Consider removing dead legs that serve no further process purpose
D. Hydrotest dead legs every year
Correct Answer: C
Explanation: Dead legs can trap stagnant fluid and corrode faster; unnecessary dead legs should be removed where practical.
Q3. When is it necessary to reevaluate the inspection frequency of an existing piping system?
A. After each inspection or significant change in operating conditions
B. Only when more than one flange leaks
C. Only when operations request it
D. Only when corrosion is visible
Correct Answer: A
Explanation: Inspection intervals must be reviewed and adjusted based on actual inspection results and changes in service conditions.
Q4. When selecting TMLs within injection point circuits, which additional location may be required?
A. Only at the nearest flange
B. Only at the injection quill
C. TMLs at intermediate locations along longer straight piping within the circuit
D. Only at dead legs outside the circuit
Correct Answer: C
Explanation: Injection points can cause localized corrosion downstream; longer straight runs may need additional monitoring.
Q5. When environmental cracking is suspected, supplemental inspections may include:
A. Radiography, WFMT, and/or ultrasonic examination
B. Visual inspection only
C. Hydrotesting only
D. Hammer testing only
Correct Answer: A
Explanation: Environmental cracking often requires surface or volumetric NDE beyond normal visual inspection.
Q6. Which of the following may supplement normal piping inspection techniques?
A. Annual hydrostatic testing for all systems
B. Periodic radiography and/or thermography to check for fouling or internal plugging
C. Painting the pipe
D. Replacing all insulation
Correct Answer: B
Explanation: RT and thermography can help detect internal blockage or fouling without opening the system.
Q7. Small-bore Class 1 secondary piping shall be inspected to:
A. Class 3 requirements
B. No requirements
C. The same requirements as Class 2 piping
D. The same requirements as Class 1 primary piping
Correct Answer: D
Explanation: Class 1 service has the highest consequence; even secondary small-bore piping requires appropriate inspection.
Q8. API 570 shall not be applied:
A. To metallic piping
B. As a substitute for original construction requirements or when in conflict with regulations
C. To process piping in refineries
D. To in-service piping systems
Correct Answer: B
Explanation: API 570 is an in-service inspection code and does not replace construction codes or legal requirements.
Q9. Which service fluid may justify Class 2 piping classification?
A. Hydrofluoric acid
B. Distillate and product lines to and from storage and loading
C. Anhydrous hydrogen chloride
D. Highly toxic gas service
Correct Answer: B
Explanation: Distillate/product transfer lines are generally lower consequence than Class 1 toxic or highly hazardous services.
Q10. If expansion joints may be damaged during hydrostatic testing and cannot be isolated, API 570 permits:
A. Testing at reduced pressure where justified
B. Canceling all testing automatically
C. Using no test at all
D. Removing all piping supports
Correct Answer: A
Explanation: Reduced-pressure testing may be used when full pressure would damage expansion joints, subject to engineering judgment.
Q11. If corrosion products have built up around pipe supports, what additional inspection may be required?
A. Repainting only
B. Lifting the pipe off the supports for inspection
C. Replacing all supports immediately
D. Hydroblasting only
Correct Answer: B
Explanation: Corrosion may be hidden at support contact points; lifting may be needed to inspect the concealed surface.
Q12. When preferential weld corrosion is found, the proper action is to:
A. Ignore it if no leak is present
B. Replace only the inspected weld
C. Examine additional welds in the same circuit or system
D. Paint the weld
Correct Answer: C
Explanation: Preferential weld corrosion may affect similar welds in the same service.
Q13. After external CUI inspection on a Class 1 system reveals insulation damage, follow-up should include NDE and insulation removal of:
A. At least 75 percent of damaged areas
B. Only vertical runs
C. The entire insulated system
D. No areas unless leaking
Correct Answer: A
Explanation: API inspection practice requires focused follow-up where insulation damage indicates possible CUI.
Q14. For refractory linings in piping systems:
A. They must always be fully removed
B. They are usually not removed unless inspection findings justify it
C. They always prevent corrosion
D. They are inspected only by hydrotest
Correct Answer: B
Explanation: Refractory removal is normally unnecessary unless damage or corrosion is suspected behind it.
Q15. Which physical sign does not normally indicate leakage in buried piping?
A. Ground contour change
B. Soil discoloration
C. Softened asphalt
D. Corrosion on the first flange above ground
Correct Answer: D
Explanation: Aboveground flange corrosion may not indicate buried piping leakage.
Q16. The inspector shall approve repair and alteration work at hold points and after completion according to:
A. API 570
B. ASME Section IX only
C. API 574 only
D. Manufacturer instructions only
Correct Answer: A
Explanation: API 570 governs inspection, repair, alteration, and rerating of in-service piping.
Q17. A close-interval potential survey on a cathodically protected buried line verifies that the piping:
A. Is leaking
B. Has proper protective potential along its length
C. Is stainless steel
D. Needs no coating
Correct Answer: B
Explanation: Close-interval surveys evaluate cathodic protection effectiveness.
Q18. Materials used in welded piping repairs or alterations shall:
A. Be of known weldable quality, code-compliant, and compatible with original material
B. Be selected only by the welder
C. Always be stainless steel
D. Require no identification
Correct Answer: A
Explanation: Repair materials must be suitable, weldable, and compatible with the existing piping.
Q19. Before welding on ASME B31.3 piping, what must be in place?
A. A hydrotest permit only
B. Qualified welding procedures and qualified welders/welding operators
C. A new piping specification every time
D. A pressure relief valve test only
Correct Answer: B
Explanation: Welding must be performed using qualified WPSs and qualified personnel.
Q20. For which P-No. 3 material is substituting 300°F preheat for PWHT generally not allowed?
A. C-Mo
B. Mn-Mo
C. Cr-Mo
D. Carbon steel
Correct Answer: C
Explanation: Cr-Mo materials are more sensitive to heat treatment requirements and cracking concerns.
Q21. A welder qualifies on a 2.375-inch OD pipe coupon. What production OD range is typically qualified?
A. 2.375 inches to unlimited
B. 1 inch to unlimited
C. 2.375 inches to 6 inches
D. 2.375 inches to 24 inches
Correct Answer: A
Explanation: Under ASME Section IX rules, qualification on pipe over certain sizes can qualify larger diameters.
Q22. A 3G welding performance test is:
A. Flat groove weld on pipe
B. Vertical groove weld in plate
C. Horizontal groove weld on pipe
D. Overhead fillet weld
Correct Answer: B
Explanation: 3G is a vertical groove weld position on plate.
Q23. Per ASME B31.3, consumable inserts may be used for backing pipe weld grooves if:
A. They are from any manufacturer
B. They are copper-based
C. They are of the same nominal composition as the parent metal
D. They are removed after welding
Correct Answer: C
Explanation: Consumable inserts should be compatible with the base metal.
Q24. When selecting TMLs, the inspector should consider:
A. Only convenient access
B. Corrosion patterns in the same or similar service
C. Only straight pipe runs
D. Only new piping systems
Correct Answer: B
Explanation: TMLs should target areas where corrosion is most likely based on service history.
Q25. The maximum external visual inspection interval for small-bore secondary piping in Class 1 service is:
A. Exempt from inspection
B. Same as Class 1 primary piping
C. 10 years
D. 15 years
Correct Answer: B
Explanation: Class 1 secondary small-bore piping follows Class 1 inspection expectations.
Q26. If severe piping movement is found during external inspection, the first corrective action should be to:
A. Consult a piping engineer about the need for stress analysis
B. Replace the pipe immediately
C. Paint the supports
D. Remove all guides
Correct Answer: A
Explanation: Severe movement may indicate stress, flexibility, or support problems requiring engineering review.
Q27. Several locally thinned areas are found. The first corrective step should be:
A. Weld buildup immediately
B. Replace the full spool
C. Have a piping engineer evaluate the thinned areas
D. Ignore if not leaking
Correct Answer: C
Explanation: Engineering evaluation determines fitness-for-service and proper repair need.
Q28. Previous inspection records are reviewed before scheduled inspection to:
A. Avoid all field inspection
B. Determine contractor payment
C. Eliminate TMLs
D. Plan inspection resources and predict repairs/replacements
Correct Answer: D
Explanation: Records help identify retirement thickness areas and plan inspection scope.
Q29. For CUI inspection, insulation should be removed from:
A. Small connections such as bleed lines and gauge connections
B. Only vertical pipe runs
C. Only new insulation
D. Only painted pipe
Correct Answer: A
Explanation: Small connections are highly susceptible to CUI and mechanical damage.
Q30. Threaded joints are generally limited to non-critical service with nominal size:
A. 2 inches or smaller
B. 3 inches or smaller
C. 6 inches or smaller
D. 10 inches or smaller
Correct Answer: A
Explanation: Threaded joints are generally restricted to small-bore, non-critical services.
Q31. Which marking must always be present on fittings used in piping systems?
A. Heat-treatment date
B. Manufacturer’s name or trademark
C. Paint code
D. Hydrotest temperature
Correct Answer: B
Explanation: Fittings must be traceable to the manufacturer.
Q32. For flanged fittings, the manufacturer shall hold the hydrostatic shell test for how long on an NPS 8 flange?
A. 1 minute
B. 2 minutes
C. 3 minutes
D. 8 minutes
Correct Answer: C
Explanation: Larger fittings require longer minimum shell-test hold times.
Q33. Deviations from specifications or standards are usually evaluated based on their effects on:
A. Safety, strength, corrosion resistance, and serviceability
B. Cost only
C. Ease of construction only
D. Paint appearance
Correct Answer: A
Explanation: Acceptance depends on whether the deviation affects safe and reliable service.
Q34. Underground piping should be inspected at:
A. Only the midpoint of buried runs
B. Only near pumps
C. At and just below/above the point where it enters earth, concrete, or asphalt
D. Only inside buildings
Correct Answer: C
Explanation: Soil-to-air interfaces are highly susceptible to corrosion.
Q35. Minimum valve body thickness is calculated as:
A. 1.5 times the simple-cylinder thickness, with specified class exceptions
B. Always equal to pipe wall thickness
C. Always 0.250 inch
D. Based only on visual inspection
Correct Answer: A
Explanation: Valve bodies are assessed using pressure design principles and code-based multipliers.
Q36. When determining piping inspection frequency, the inspector must consider:
A. Paint color and flange type
B. Degree of risk and remaining corrosion allowance
C. Number of operators
D. Pipe manufacturer only
Correct Answer: B
Explanation: Inspection frequency is risk-based and depends strongly on remaining life.
Q37. For butt-welded piping in severe cyclic service, the welding procedure should provide:
A. External reinforcement only
B. A smooth, regular, fully penetrated inner surface
C. Socket weld backing
D. Threaded connections
Correct Answer: B
Explanation: Severe cyclic service requires smooth internal geometry to reduce fatigue risk.
Q38. When preheating for a B31.3 weld, the preheat zone shall extend at least:
A. 50 mm / 2 inches beyond each weld edge
B. 25 mm / 1 inch beyond each weld edge
C. 12.5 mm / 1/2 inch beyond each weld edge
D. 100 mm / 4 inches beyond each weld edge
Correct Answer: A
Explanation: Preheat must cover enough area around the joint to control cooling rate.
Q39. Preheating before welding may be omitted if:
A. The pipe is painted
B. Approved by the API 570 authorized inspector only
C. Approved by the piping engineer where permitted
D. The welder requests it
Correct Answer: C
Explanation: Omission of preheat requires engineering/code acceptance.
Q40. Pneumatic testing may be substituted for hydrostatic testing when:
A. Hydrotest water would overload/deform the system or contaminate it and cleaning is impractical
B. It is cheaper
C. The inspector prefers air
D. The system is painted
Correct Answer: A
Explanation: Pneumatic testing is allowed only when hydrotesting is impractical or harmful.
Q41. New and replacement piping components shall:
A. Follow only API 574
B. Be designed and fabricated according to the applicable construction code principles
C. Ignore original construction code
D. Be selected only by operations
Correct Answer: B
Explanation: Replacements must meet applicable code requirements and design principles.
Q42. During leak testing, piping joints should be:
A. Covered with insulation
B. Left uninsulated and exposed for examination
C. Painted before inspection
D. Hidden behind temporary covers
Correct Answer: B
Explanation: Welds, bonds, and joints must be visible for leak detection during testing.
Q43. Which statement describes a globe valve?
A. A tapered plug rotates inside a matching seat
B. Used only fully open or fully closed
C. A disk moves axially against a seat
D. A spherical ball rotates through 90 degrees
Correct Answer: C
Explanation: Globe valves use a disk moving against a seat and are suitable for throttling.
Q44. Which best describes common check valve operation?
A. Manually rotated stem
B. Swing, lift-piston, ball, or spring-assisted closure preventing backflow
C. Sliding gate for high-temperature solids
D. Plug rotated inside a tapered seat
Correct Answer: B
Explanation: Check valves automatically close to prevent reverse flow.
Q45. Creep cracking has been experienced in industry in:
A. Carbon steel below 200°F
B. Stainless steel below freezing
C. 1¼ Cr steels above about 900°F
D. Plastic piping at ambient temperature
Correct Answer: C
Explanation: High-temperature Cr-Mo steels may experience creep damage after long service.
Q46. Which condition always requires reporting to the owner-user?
A. Pipe needing paint
B. Minor insulation scratch
C. Minor surface dirt
D. Significant increase in corrosion rate
Correct Answer: D
Explanation: Increased corrosion rate affects remaining life and inspection interval.
Q47. A highly effective way to prevent failure in piping with a hot spot is to:
A. Perform thermography and take corrective action as needed
B. Hammer the bulge back
C. Ignore it until shutdown
D. Paint the area
Correct Answer: A
Explanation: Thermography identifies overheating so corrective action can be taken before failure.
Q48. Misalignment is usually caused by:
A. Inadequate expansion provision, broken hangers, or defective anchors/guides
B. Correct hanger adjustment
C. Correct flexibility design
D. Properly installed anchors
Correct Answer: A
Explanation: Support and expansion problems commonly cause misalignment.
Q49. A flange manufactured to ASME B16.5 is not required by the manufacturer to:
A. Mark rating class
B. Mark trademark
C. Hydrostatically test the flange
D. Mark material
Correct Answer: C
Explanation: B16.5 flanges are not individually hydrotested by the manufacturer as a standard requirement.
Q50. Many pipe-to-pipe welded branch joint failures are caused by:
A. Paint defects only
B. Higher-than-normal stresses from valve weights, vibration, and thermal loading
C. Excessive gasket thickness
D. Wrong nameplate location
Correct Answer: B
Explanation: Branch connections are stress concentration points and can fail under additional loading.
Q51. Class 1 piping systems are best described as:
A. Services with the highest potential for immediate emergency if leakage occurs
B. Ordinary utility water systems
C. Low-pressure nonflammable services only
D. Nonmetallic piping only
Correct Answer: A
Explanation: Class 1 services have the highest consequence of failure.
Q52. Which is not an example of environmental cracking?
A. Chloride SCC
B. Polythionic acid SCC
C. Low-temperature SCC
D. Carbonate SCC
Correct Answer: C
Explanation: “Low-temperature SCC” is not normally listed as a standard API 570 environmental cracking type.
Q53. Which is not a common flange type?
A. Welding neck
B. Slip-on
C. Threaded socket
D. Lap joint
Correct Answer: C
Explanation: “Threaded socket” is not a standard flange type; threaded and socket-weld are separate types.
Q54. API RP 574 covers inspection of:
A. Piping, tubing, valves, and fittings
B. Pressure vessels only
C. Control valves only
D. Boilers only
Correct Answer: A
Explanation: API 574 provides inspection practices for piping system components.
Q55. Ultrasonic equipment calibration should be checked:
A. Once per year only
B. At the beginning of each examination and whenever malfunction is suspected
C. Only after the job is finished
D. Only by the manufacturer
Correct Answer: B
Explanation: UT accuracy depends on regular calibration checks.
Q56. Direct visual inspection is usually possible when the eye can be placed within:
A. 6 to 24 inches of the surface
B. 5 feet of the surface
C. 10 feet of the surface
D. Any distance if lighting is good
Correct Answer: A
Explanation: Direct visual examination requires close access and proper lighting.
Q57. When magnetic particle examination uses an enhancement coating, it must be demonstrated that:
A. The coating is decorative
B. The coating is at least 1/8 inch thick
C. Indications can be detected through the coating
D. The coating is removed after every pass
Correct Answer: C
Explanation: Coating must not mask relevant indications.
Q58. A Procedure Qualification Record may:
A. Omit all essential variables
B. Be verbal only
C. Include nonessential variables
D. Replace welder qualification records
Correct Answer: C
Explanation: PQRs must record essential variables and test results; they may include nonessential variables.
Q59. A procedure qualified with P-No. 1 to P-No. 3 does not qualify production welding of:
A. P-No. 1 to P-No. 3
B. P-No. 1 to P-No. 1
C. P-No. 3 to P-No. 3
D. P-No. 1 to P-No. 3 only
Correct Answer: C
Explanation: A dissimilar P1-to-P3 qualification does not automatically qualify P3-to-P3 welding.
Q60. Before adopting any inspection method for piping, what should be checked?
A. Regulatory requirements
B. Paint specification
C. Operator preference
D. Pipe color code only
Correct Answer: A
Explanation: Inspection methods must comply with applicable regulations and owner-user requirements.
Q61. Who must be consulted when piping system alterations are considered?
A. Warehouse supervisor
B. Piping engineer
C. Painter
D. Vendor only
Correct Answer: B
Explanation: Alterations can affect design conditions and require piping engineering input.
Q62. Which on-stream welded repair is not permitted by API 570?
A. Full encirclement split sleeve
B. Pitting repair enclosure
C. Square fillet-welded patches without rounded corners
D. Box-type enclosure
Correct Answer: C
Explanation: Patches should have rounded corners to reduce stress concentration.
Q63. Unlisted materials may be used in B31.3 piping if they:
A. Are cheaper
B. Are approved by the welder
C. Are marked in any language
D. Conform to a published specification and meet B31.3 requirements
Correct Answer: D
Explanation: Unlisted materials must still have known properties and satisfy code requirements.
Q64. When impact testing is required by B31.3, how many specimens are normally in one set?
A. 3
B. 6
C. 9
D. 12
Correct Answer: A
Explanation: A Charpy impact test set normally consists of three specimens.
Q65. Which right does the owner’s inspector not have during fabrication?
A. Access to work locations
B. Right to audit examinations
C. Right to review required certifications and records
D. Right to demand craftsmen’s social security numbers
Correct Answer: D
Explanation: Personal identification data is not part of inspection authority.
Q66. For B31.3 spot radiography of circumferential butt welds, the least recommended amount is:
A. One weld in 20 made by each welder/welding operator
B. One weld in 10
C. Every third weld
D. Every 50 linear feet
Correct Answer: A
Explanation: B31.3 commonly uses spot examination such as one in twenty welds, depending on service and design.
Q67. ASME B31.3 accepts which practice for qualification/training of NDE personnel?
A. Owner preference only
B. SNT-TC-1A
C. Informal experience only
D. Verbal approval only
Correct Answer: B
Explanation: SNT-TC-1A is a recognized NDE personnel qualification practice.
Q68. Which is not Normal Fluid Service under B31.3?
A. Fluid not subject to Category D, M, high pressure, or severe cyclic conditions
B. Fluid service immediately dangerous to life or health
C. Ordinary nonhazardous liquid service
D. Normal refinery utility service
Correct Answer: B
Explanation: IDLH service aligns with more severe classifications, not normal fluid service.
Q69. Low-yield-strength bolting is permitted with metallic flanges when:
A. Calculations show adequate strength to maintain joint tightness
B. The bolts are painted
C. The gasket is thick
D. The operator approves verbally
Correct Answer: A
Explanation: Joint integrity must be demonstrated by calculation.
Q70. The Initial Service Leak Test applies to:
A. Category M fluid
B. Class 1 piping
C. Category D fluid
D. High-pressure service
Correct Answer: C
Explanation: B31.3 permits initial service leak testing for Category D fluid service under certain conditions.
Q71. In general, inspection extent for new piping construction depends largely on:
A. Paint system
B. Flange size
C. Severity of service and quality of workmanship
D. Pipe color
Correct Answer: C
Explanation: More severe service or questionable workmanship requires greater examination.
Q72. Which would not normally cause a more frequent inspection cycle?
A. Remaining corrosion allowance
B. Historical corrosion data
C. Regulatory requirements
D. A general EPA survey unrelated to piping condition
Correct Answer: D
Explanation: Inspection frequency is driven by condition, risk, corrosion history, and legal requirements.
Q73. Which is not a major concern in pressure relief discharge piping design?
A. Drainage
B. Reaction forces/moments
C. Valve manufacturer brand preference
D. Suitable material and layout
Correct Answer: C
Explanation: Brand preference is not a technical design concern.
Q74. API 570 covers:
A. New construction only
B. Metallic piping systems that have been in service
C. Boilers only
D. Nonmetallic piping only
Correct Answer: B
Explanation: API 570 applies to inspection, repair, alteration, and rerating of in-service metallic piping systems.
Q75. Which statement is not true about API 570 scope?
A. It applies to in-service metallic piping
B. Certain water systems may be optional depending on owner-user scope and regulation
C. Nonmetallic piping is not covered by API 570 rules
D. API 570 is primarily for new construction acceptance
Correct Answer: D
Explanation: API 570 is for in-service piping, not original new construction acceptance.
Q76. Steel and alloy piping are manufactured to standard dimensions in nominal pipe sizes up to:
A. 24 inches
B. 36 inches
C. 48 inches
D. 52 inches
Correct Answer: C
Explanation: Standard pipe dimensions commonly extend to NPS 48.
Q77. Which is not an advantage of radiography?
A. Insulation can sometimes remain intact
B. Metal temperature usually has little effect on radiograph quality
C. Radiographic equipment is always easily maneuverable in refineries
D. It can reveal internal profile or wall loss
Correct Answer: C
Explanation: RT equipment and safety barricades can be difficult to use in congested refinery areas.
Q78. Aboveground visual surveillance of underground piping usually includes inspection:
A. At and just below where it enters earth, asphalt, or concrete
B. Only by internal camera
C. Only by full excavation
D. Only by hydrotest
Correct Answer: A
Explanation: Soil-to-air interfaces are common external corrosion locations.
Q79. A flanged joint consists of flanges, gasket, and bolting, all affected by:
A. Pipe color
B. The assembler
C. Weather only
D. Pipe support spacing only
Correct Answer: B
Explanation: Assembly quality strongly affects flange leak-tightness.
Q80. A 4-inch by 4-inch tee reducing to 2 inches on the outlet is designated as:
A. 4 × 4 × 2
B. 4 × 2 × 4
C. 2 × 4 × 4
D. 2 × 2 × 4
Correct Answer: A
Explanation: Tee dimensions are typically run × run × branch.
Q81. Charpy results are 16, 17, and 12 ft-lbf. Required average is 13 ft-lbf; minimum single value is 10 ft-lbf. The results:
A. Fail because one value is below average
B. Pass the B31.3 acceptance criteria
C. Fail because all must exceed 13
D. Must be discarded
Correct Answer: B
Explanation: Average is 15 ft-lbf and the lowest value is above 10 ft-lbf, so the set passes.
Q82. Safeguarding a piping system means:
A. Adding protective measures to reduce risk
B. Posting a guard only
C. Painting the pipe yellow
D. Replacing all relief valves
Correct Answer: A
Explanation: Safeguarding includes protective measures beyond normal design where needed.
Q83. Threaded joints may be used where:
A. Severe erosion is expected
B. Severe corrosion is not expected
C. Severe vibration is expected
D. Crevice corrosion is expected
Correct Answer: B
Explanation: Threaded joints are unsuitable for severe corrosion, erosion, or vibration.
Q84. Cold spring in piping means:
A. Freezing of the pipe
B. Accidental bending during operation
C. Intentional deformation to produce a desired installed condition
D. Thermal shock cracking
Correct Answer: C
Explanation: Cold spring is intentional displacement used to manage thermal expansion stresses.
Q85. For MAWP calculation of in-service piping made of unknown material:
A. Use the highest possible stress value
B. Assume the lowest grade material and joint efficiency in the applicable code
C. Use stainless steel values
D. No calculation is permitted
Correct Answer: B
Explanation: Conservative assumptions are required when material identity is unknown.
Q86. Dry and wet magnetic particles shall comply with:
A. SE-709
B. API 570 only
C. ASME B31.3 only
D. API 574 only
Correct Answer: A
Explanation: ASME Section V Article 7 references SE-709 for magnetic particle examination.
Q87. Radiographic sensitivity means:
A. Film brand preference
B. Radiographer attitude
C. Smallest discernible detail and/or contrast change in the image
D. Film package color
Correct Answer: C
Explanation: Sensitivity measures the ability of a radiograph to reveal fine detail or contrast.
Q88. A liquid penetrant comparator block for high-temperature technique is commonly:
A. Carbon steel block
B. Aluminum block, approximately 3/8 inch × 2 inch × 3 inch
C. Brass block only
D. Titanium block only
Correct Answer: B
Explanation: Aluminum comparator blocks are commonly used to demonstrate high-temperature PT technique.
Q89. If a welder qualified with backing wants to weld without backing in production:
A. Requalification is required
B. No rule exists
C. Approval by operator is enough
D. Paint backing may be used
Correct Answer: A
Explanation: Removing backing is an essential variable for welder performance qualification.
Q90. A welding operator qualified by radiography using the first production weld requires a minimum radiographed length of:
A. 6 inches
B. 12 inches
C. 36 inches
D. 6 feet
Correct Answer: D
Explanation: ASME Section IX requires a longer production weld radiographic length for operator qualification.
Q91. A welder performance test on pipe in the 1G position requires how many bend tests?
A. 2
B. 4
C. 6
D. 1
Correct Answer: B
Explanation: Groove weld performance qualification commonly requires face/root or side bend tests totaling four specimens.
Q92. The 6G pipe position is described as pipe fixed at:
A. 45 degrees
B. 45 degrees ± 5 degrees
C. 45 degrees ± 10 degrees
D. Horizontal only
Correct Answer: A
Explanation: 6G is the inclined fixed pipe position, commonly 45 degrees.
Q93. An alternative or supplement to underground piping inspection is leak testing with liquid at least:
A. 10 percent greater than maximum operating pressure
B. 25 percent greater than maximum operating pressure
C. 50 percent greater than maximum operating pressure
D. Equal to normal operating pressure
Correct Answer: A
Explanation: API 570 permits leak testing above maximum operating pressure as an inspection supplement.
Q94. Underground piping inspected by periodic excavation should be inspected in lengths of:
A. 2 to 4 feet
B. 6 to 8 feet
C. 20 feet minimum
D. Entire line only
Correct Answer: B
Explanation: Representative excavation lengths are used at locations most susceptible to corrosion.
Q95. Who establishes inspection intervals for thickness measurements on in-service piping?
A. Owner-user/inspector in accordance with API 570 program requirements
B. Only the welder
C. Only the manufacturer
D. Only the valve vendor
Correct Answer: A
Explanation: The owner-user inspection program establishes intervals, typically with inspector involvement.
Q96. Acceptance of a welded repair or alteration normally includes:
A. NDE of the welds as required
B. Agreement by NBIC inspector only
C. Hydrotest in every case without exception
D. Paint inspection only
Correct Answer: A
Explanation: Welded repairs require appropriate NDE and pressure testing only when required by code or engineering decision.
Q97. Rerating a piping system means changing:
A. Paint color
B. Pipe tag number
C. Temperature rating or MAWP
D. Insulation thickness only
Correct Answer: C
Explanation: Rerating changes the pressure-temperature design basis.
Q98. Coating repairs to underground piping should ensure the coating:
A. Has adhesion only
B. Is ductile only
C. Has no holidays only
D. Has adhesion, ductility, and is free of holidays
Correct Answer: D
Explanation: Underground coatings must adhere, resist cracking, and be free of voids/gaps.
Q99. A piping inspection record does not necessarily need to contain:
A. Original thickness measurements
B. Installation date
C. Material specifications
D. Names of all welders who fabricated the piping
Correct Answer: D
Explanation: Welder names may be fabrication QA records, but inspection records focus on condition, thickness, repairs, and service history.
Q100. The recommended downstream limit of an injection point circuit is:
A. First flange only
B. Second change in flow direction, or 25 feet beyond the first change in direction, whichever is greater
C. 10 feet only
D. Upstream block valve only
Correct Answer: B
Explanation: Injection point circuits extend downstream far enough to capture likely mixing/corrosion zones.
Q101. The most common forms of CUI are:
A. Localized carbon steel corrosion and chloride SCC of austenitic stainless steel
B. Graphitization and creep only
C. Hydrogen blistering only
D. Fatigue cracking only
Correct Answer: A
Explanation: CUI commonly attacks carbon steel by localized corrosion and stainless steel by chloride SCC.
Q102. SIA interface inspections for buried piping without adequate cathodic protection do not necessarily include:
A. Coating damage inspection
B. Bare pipe inspection
C. Pit-depth measurement
D. Complete confirmation that drawings reflect the present piping system
Correct Answer: D
Explanation: Drawing verification is useful but not necessarily part of every SIA corrosion inspection.
Q103. ASME B16.5 covers flanges through NPS 24. Larger flanges are covered by:
A. API 570 only
B. ASME B16.47
C. API 598 only
D. ASME Section IX
Correct Answer: B
Explanation: ASME B16.47 covers large-diameter steel flanges.
Q104. Opened flanged joints should be visually inspected for:
A. Corrosion and defects such as scratches, cuts, and gouges on gasket seating faces
B. Paint shade only
C. Vendor stamp only
D. Pipe support spacing
Correct Answer: A
Explanation: Gasket seating face defects can cause leakage after reassembly.
Q105. Gate valves should be measured for thickness between the:
A. Inlet and outlet only
B. Seats
C. Handwheel and stem
D. Bonnet and packing gland only
Correct Answer: B
Explanation: The area between seats may be thinner and subject to corrosion.
Q106. The sensitive leak test method of ASME B31.3 may use:
A. Gas and bubble test method, helium test, or another equally sensitive method as applicable
B. Hammer testing only
C. Paint testing only
D. Visual inspection from 10 feet
Correct Answer: A
Explanation: Sensitive leak testing uses methods capable of detecting very small leaks.
Q107. Unless otherwise specified, examination procedures and personnel qualification records shall be retained after project completion for:
A. 6 months
B. 1 year
C. 5 years
D. 10 years
Correct Answer: C
Explanation: B31.3 record retention requirements commonly specify five years for these records.
Q108. Which item is not permitted to have increased joint efficiency by additional examination?
A. Electric fusion welded pipe
B. Seamless piping
C. API 5L welded pipe
D. Furnace butt-welded continuous-weld pipe
Correct Answer: B
Explanation: Seamless pipe has no longitudinal welded joint efficiency to increase.
Q109. In liquid penetrant examination, after surface preparation, drying should:
A. Be ignored
B. Be forced only by flame
C. Be allowed adequate time before penetrant application
D. Be skipped for stainless steel
Correct Answer: C
Explanation: Moisture can interfere with penetrant entry into discontinuities.
Q110. A welding procedure qualified by groove weld coupon is not suitable for:
A. Groove welds
B. Fillet welds
C. Weld metal buildup
D. Similar base-metal groove repairs
Correct Answer: C
Explanation: Weld metal buildup may require separate procedure qualification depending on code requirements.
Q111. Socket-welded and threaded connections are not recommended above 500°F or below −50°F when:
A. Severe thermal gradients or thermal cycling are involved
B. Paint is missing
C. The pipe is carbon steel
D. The pipe is tagged
Correct Answer: A
Explanation: Thermal cycling increases fatigue and leakage risk at threaded/socket connections.
Q112. Protective equipment is required for inspection personnel:
A. Only during hydrotesting
B. When required by regulations or the owner-user
C. Only when the inspector feels cold
D. Only during night work
Correct Answer: B
Explanation: PPE requirements are governed by regulations, site rules, and hazard assessments.
Q113. The extent of a CUI inspection program may vary depending on:
A. Local climate
B. Condition of the insulation system
C. Type of insulation used
D. All of the above
Correct Answer: D
Explanation: CUI risk depends on environment, insulation condition, insulation type, coating, temperature, and service.
Q114. Internal visual inspections of piping are:
A. Not normally performed
B. Required for every piping system
C. Pointless
D. A substitute for all NDE
Correct Answer: A
Explanation: Internal inspection is useful where practical, but piping geometry usually limits access.
Q115. For piping suspected of environmental cracking, a supplemental inspection example is:
A. Wet fluorescent magnetic particle examination
B. Paint thickness measurement only
C. Hammer testing only
D. Visual inspection from grade only
Correct Answer: A
Explanation: WFMT is effective for detecting fine surface cracking in ferromagnetic materials.