combined model 14

API 570 Model question-1 The following is a collection of questions remembered by various students who took API 570 exam in the past. The answers will be found in the following reference publications API 570, RP 574, RP 578, ASME Sec.V, Sec.IX, B 31.3 & B 16.5(a) 1. What is the height of the raised face on regularly furnished class 300 Raised Face Flanges?

A. 0.06 B. 0.09 C. 0.19 D. 0.25

Section/page _____________________ Reference Publication__________________ 2. In a piping system, NPS 4, SMLS material A-53 Grade B, the thickness near a wel is 0.18”. The system is designed to

operate at 675 PSIG at 500°F. What is the actual remaining corrosion allowance? A. 0.076 B. 0.080 C. 0.091 D. 0.1

Section/page _____________________ Reference Publication__________________ 3. Which of the following are nonessential variables for SMAW?

A. Change of electrode B. Change in the groove design C. Change in the PWHT D. Change in the welding process

Section/page _____________________ Reference Publication__________________ 4. When designating an injection point circuit for the purpose of inspection, the recommended upstream limit of the

injection point circuit is__________? A. Minimum 12 inches B. Maximum 12 inches C. Three pipe diameters D. Both A and C

Section/page _____________________ Reference Publication__________________ 5. A process in which a ferrous metal is heated to a suitable temperature above the transformation range and is

subsequently cooled in still air at room temperature is referred to as ____________? A. quenching B. Normalizing C. Annealing D. Solution heat treating

Section/page _____________________ Reference Publication__________________ 6. One advantage of isotope radiography is it _____________

A. Will detect all defects in a pipe weld B. Can be performed by anyone with little or no training C. Can not supply a permanent visual record D. Is not an ignition source in the presence of hydrocarbons

Section/page _____________________ Reference Publication__________________ 7. A piping circuit, 300’long, operates at 500°F. What is the linear thermal expansion of the circuit if the circuit was

constructed using A 106-B piping? A. 3.62 inches

API 510 Model question-1 Mohan Raj of 4

B. 7.24 inches C. 10.86 inches D. 14.48 inches

Section/page _____________________ Reference Publication__________________ 8. An employer may accept a performance qualification made for another employer provided the ___________________

A. Inspector specifically approves B. Piping engineer approves C. Action is allowed by ASME, Section V D. Other employer is a subcontractor for the current employer

Section/page _____________________ Reference Publication__________________ 9. Guided bend specimens for welder qualifications shall have no open defects in the weld or heat affected zone

exceeding ______________ A. 1/16” B. 1/8” C. 3/16” D. no open defects allowed

Section/page _____________________ Reference Publication__________________ 10. The inspector is reviewing a radiograph of a pipe weld, the pipe wall is ½” thick. What is the hole type IQI designation

if the penetrameter is placed on the source side? A. 12 B. 15 C. 17 D. 20

Section/page _____________________ Reference Publication__________________ 11. In a piping system, the most susceptible location for cracking is ______________

A. Around supports B. In welds C. In bolting D. In the areas of temporary clamps

Section/page _____________________ Reference Publication__________________ 12. What is the “P”No. for SA 414 Grade A?

A. 1 B. 2 C. 3 D. 11B

Section/page _____________________ Reference Publication__________________ 13. What is the minimum thickness of a class 1500 NPS 4 blind flange?

A. 1.12” B. 1.88” C. 2.12” D. 2.88”

Section/page _____________________ Reference Publication__________________ 14. The preheat zone shall extend at least ___________ beyond each edge of the weld

A. 6T B. 12 inches (30cm) C. wall thickness divided by 3 D. 25 mm (1 inch)

Section/page _____________________ Reference Publication__________________ 15. During procedure qualification, how many nick-break specimens are required if the pipe is NPS 8 S/80, 0.500 wall?

A. 1


B. 2 C. 4 D. None

Section/page _____________________ Reference Publication__________________ 16. The owner/user shall maintain appropriate permanent and progressive records of each piping system. The records

shall include _________________ A. All original construction data B. System service; classification; identification numbers C. All ASME requirements D. Original heat and batch numbers of the system

Section/page _____________________ Reference Publication__________________ 17. The maximum carbon content of a mild steel weld deposit is ______________

A. 0.15% carbon B. 0.20% carbon C. 0.30% carbon D. 0.17% carbon

Section/page _____________________ Reference Publication__________________ 18. What is the recommended preheat temperature for 1 ¼” thick carbon steel?

A. 300°F B. 235°F C. 175°F D. None

Section/page _____________________ Reference Publication__________________ 19. An alternative to inspection of buried piping is to leak test the system with liquid at a pressure at least

______________ A. 1 ½ times the Maximum operating pressure B. 1 ¼ times the Maximum operating pressure C. 10% greater than the Maximum operating pressure D. Actual

Section/page _____________________ Reference Publication__________________ 20. The F number of SFA-5.1 & 5.5 is:

A. 1 B. 2 C. 3 D. All of the above

Section/page _____________________ Reference Publication__________________ 21. As a part of general maintenance, any repair organization may make repairs to a piping system as long as:

A. The inspector is satisfied with the competency of the repair organization B. The piping engineer is on site C. The repair organization has a contract D. Their hourly rate is acceptable

Section/page _____________________ Reference Publication__________________ 22. Welded joints in carbon steel and carbon-molybdenum steel exposed to elevated temperatures of 800°F or over may

be subjected to ______________ A. Pearlite structure B. annealing C. graphitization D. normalizing

Section/page _____________________ Reference Publication__________________ 23. What is the allowable undercut for a branch connection in Category D service?


A. Zero (no evident imperfections) B. ≤ 1/32 inch C. ≤ 1 mm D. Both B and C

Section/page _____________________ Reference Publication__________________ 24. Changing the weld progression from uphill to down hill will have a major impact on ______________

A. Nick-break strengths B. Notch toughness properties C. Tensile strengths D. Bulge tests

Section/page _____________________ Reference Publication__________________ 25. What is the test position when the pipe is horizontal, fixed?

A. 1G B. 2G C. 5G D. 6G

Section/page _____________________ Reference Publication__________________ 26. API ______________ provides a detailed discussion of inspection of in-service piping welds.

A. Section IX B. B 31.3 C. 570 D. B 16.5a

Section/page _____________________ Reference Publication__________________ 27. TMLs can be eliminated for piping systems with which of the following characteristics:

A. high potential for creating an emergency in the event of a leak B. extremely corrosive systems C. low potential for creating an emergency in the event of a leak D. piping systems in cyclic conditions at high pressures and temperatures

Section/page _____________________ Reference Publication__________________ 28. When determining the corrosion rate, the formulas from API 570 may be used or:

A. Published data on piping system in comparable service B. Owner/user’s experience C. Budget restraints D. Both A and B

Section/page _____________________ Reference Publication__________________ 29. The owner/user shall maintain appropriate permanent and progressive records about each piping system covered by

API 570, this may be done by: A. The inspector’s memory B. The project managers secretary C. Computer based system D. Records are not a requirement of API 570

Section/page _____________________ Reference Publication__________________ 30. When the corrosion rte for a piping circuit can not otherwise be determined, the initial thickness measurement

determination shall be made after no more than: A. 1 year B. 6 months C. 3 months D. 30 days

Section/page _____________________ Reference Publication__________________


API 570 Model question-2 The following is a collection of questions remembered by various students who took API 570 exam in the past. The answers will be found in the following reference publications API Standard 570 Piping inspector code API Recommended practice 574 ASME Boiler & Pressure vessel code Sec.V Non-destructive examination Sec.IX Welding and brazing qualifications ASME B 16.5 Pipe flanges & Flanged fittings ASME B 31.3 Process Piping 31. When evaluating a radiograph of 2 1/4” thick carbon steel piping, what is the maximum geometric unsharpness?

A. 0.020 B. 0.030 C. 0.040 D. 0.070

Section/page _____________________ Reference Publication__________________ 32. What is the test position when the pipe is vertical?

A. 1G B. 2G C. 5G D. 6G

Section/page _____________________ Reference Publication__________________ 33. The location markers which are to appear as radiographic images on the film shall be placed on the

_______________

A. part B. film holder/cassette C. film side only D. IQI

Section/page _____________________ Reference Publication__________________ 34. What is the outside diameter of a gasket for a Class 400 NPS 12 slip-on raised face flange, the edges of the gasket

do not extend to the bolt.

A. 12.75” B. 15.00”

API 510 Model question-2 Mohan Raj Page 1 of 5

C. 16.50” D. 18.00”

Section/page _____________________ Reference Publication__________________ 35. If the soil resistivity is 6,500 ohm-cm, what is the inspection interval for buried piping without cathodic protection?

A. 10 years B. 15 years C. 5 years D. Whenever a leak is suspected

Section/page _____________________ Reference Publication__________________ 36. The ammeter on each piece of magnetizing equipment shall not deviate by more than _____________

A. 30% B. 10% C. 20% D. 15%

Section/page _____________________ Reference Publication__________________ 37. A welder is tested on ½ inch thick pipe in the 5G position. How many face bends are required for this test?

A. 1 B. 2 C. 3 D. 4

Section/page _____________________ Reference Publication__________________ 38. What is the minimum operating temperature that normalized A 516 Grade 70 plate can be used without impact

testing?

A. -29°F B. -20°F C. -50°F D. 0°F

Section/page _____________________ Reference Publication__________________ 39. Bellow expansion joints should be inspected visually for:

A. misalignment B. thickness C. weight D. coating thickness

Section/page _____________________ Reference Publication__________________ 40. A welder is tested on 1/2 inch thick plate, how many face bends are required for this test?

A. 1 B. 2 C. 3 D. 4

Section/page _____________________ Reference Publication__________________ 41. During the final four hours of buried piping test, which was repressured to 125 PSI, the gauge fell 5 PSI

A. The piping system failed B. The piping system passed C. The test must be repeated D. The piping system must be visually inspected


Section/page _____________________ Reference Publication__________________ 42. A WPS is written qualified welding procedure prepared to provide direction for ___________

A. Making production welds to code requirements B. The welder to make temporary welds C. The inspector for inspection of the welds D. The welder to use as a general guideline

Section/page _____________________ Reference Publication__________________ 43. A steel that hardens during cooling in air from a temperature above its transformation range is ________________

A. Quenched and tempered steel B. Annealed steel C. Air-hardened steel D. Normalised steel

Section/page _____________________ Reference Publication__________________ 44. A pipe welder successfully passes a 6G pipe test. The welder can weld in which of the following positions?

A. 1G B. 2G C. 5G D. All positions

Section/page _____________________ Reference Publication__________________ 45. A radiograph may be produced without a written procedure if ____________

A. A client approves it B. The inspector approves it C. The density and penetrameter meet Article-2 requirements D. The weld quality is satisfactory

Section/page _____________________ Reference Publication__________________ 46. The work necessary to restore a piping system to a condition suitable for safe operation at the design condition is

_________________

A. rework B. repair C. renewal D. Total replacement

Section/page _____________________ Reference Publication__________________ 47. Material in the form of ring used to support molten weld metal is called ______________

A. Backing gas B. Cold wire slug C. Consumable insert D. Backing ring

Section/page _____________________ Reference Publication__________________ 48. Backscatter radiation is determined by the use of ________________

A. A lead “B” on the back of the film holder. B. A film badge C. A radioactive meter D. A mirror held parallel to the film holder



49. Who shall have the overall responsibility for compliance with API 570 and for establishing requirements for

inspection, repair, alteration and rerating?

A. Piping engineer B. Repair organization C. inspector D. Owner/user

Section/page _____________________ Reference Publication__________________ 50. During a procedure qualification test on pipe that is 3/8 inches thick, how many side bends are required if the face

and root bends are acceptable?

A. 1 B. 2 C. 4 D. None

Section/page _____________________ Reference Publication__________________ 51. As a standard technique, the temperature of the penetrant and the surface of the part to be processed shall not be

below _____________

A. 125°F B. 50°F C. 32°F D. 81°C

Section/page _____________________ Reference Publication__________________ 52. Small bore piping is piping that is less than ______________

A. NPS 2 B. NPS 3 C. Or equal to NPS 2 D. NPS 6

Section/page _____________________ Reference Publication__________________ 53. Excess water washable penetrant shall be removed with a water spray. The water pressure shall not exceed

__________________

A. 110 PSI B. 90 PSI C. 50 PSI D. 20 PSI

Section/page _____________________ Reference Publication__________________ 54. The intent of B 31.3 is to set forth engineering requirement deemed necessary for safe design and

______________

A. Construction of tank installations B. Construction of piping installations C. Construction of vessel installations D. Construction of bridge installations

Section/page _____________________ Reference Publication__________________ 55. Flushing the surface with solvent, following the application of the penetrant and prior to developing is

_________________

A. The average PT technique B. Allowed if sufficient solvent is available C. Not mentioned in ASME Section V


D. prohibited Section/page _____________________ Reference Publication__________________ 56. Welding terms not specifically referenced in ASME B31.3 can be found in what document?

A. ASME Section IX B. ASME Section V C. AWS A 2.4 D. AWS A 3.0

Section/page _____________________ Reference Publication__________________ 57. How many tensile test are required to qualify a ¼” plate groove weld?

A. 2 B. 3 C. 4 D. 6

Section/page _____________________ Reference Publication__________________ 58. What is the maximum allowable prod spacing using an AC prod technique?

A. t/2 B. 8 inches C. 10 inches D. No spacing required

Section/page _____________________ Reference Publication__________________ 59. _________ may not be performed on the root pass or final pass of a weld.

A. Peening B. Cleaning C. Stress Relieving D. Painting

Section/page _____________________ Reference Publication__________________ 60. Which of the following are not normally performed on piping?

A. Internal visual inspection B. Excavation of buried piping C. Thickness measurements D. External visual inspection



API 570 Model question-3 The following is a collection of questions remembered by various students who took API 570 exam in the past. The answers will be found in the following reference publications API Standard 570 Piping inspector code API Recommended practice 574 ASME Boiler & Pressure vessel code Sec.V Non-destructive examination Sec.IX Welding and brazing qualifications ASME B 16.5 Pipe flanges & Flanged fittings ASME B 31.3 Process Piping 61. A physical change in any component that has design implications affecting the pressure containing capacity of a

piping system is defined as a(n) ___________

A. rework B. repair C. renewal D. alteration

Section/page _____________________ Reference Publication__________________ 62. Determine the MAWP, at the next inspection, of the following piping system based on the following

Design pressure/ Temperature 700 PSIG/300°F Pipe description NPS 10, SA 285 Gr.C, EFW Spiral seam-No RT Thickness determined from inspection 0.30 in. Observed corrosion rate 0.02 in/year Next planned inspection 5 years MAWP = _____________

A. 263 PSIG B. 329 PSIG C. 732 PSIG D. 125 PSIG

Section/page _____________________ Reference Publication__________________ 63. When may a new employer accept a performance qualification made for a previous employer?

A. This action is not allowed by ASME, Section V B. When the piping engineer approves C. When the inspector specifically approves D. When the other employer is a subcontractor for the current employer



64. A term which indicates that a provision is neither required nor prohibited.

A. must B. may C. shall D. should

Section/page _____________________ Reference Publication__________________ 65. If a weldment is allowed to cool prior to heat treatment, the rate of cooling shall be ___________

A. Controlled B. 50°F per hour to ambient C. 100°F per hour to ambient D. Water cooled immediately

Section/page _____________________ Reference Publication__________________ 66. Wet magnetic particle examination shall not be performed if the surface temperature of the part exceeds

_____________

A. 100°C B. 40°F C. Manufacturer’s temperature limitations D. 135°F

Section/page _____________________ Reference Publication__________________ 67. When it is necessary to verify the adequacy or direction of the magnetizing field, ________ shall be used.

A. A pie-shaped magnetic particle field indicator B. A polarized lens type indicator C. A florescent light with appropriate safety shield D. Iron powder in a non-aqueous base

Section/page _____________________ Reference Publication__________________ 68. The joint efficiency of an in-service piping system is less than 1, corrosion was found, along the long seam of the

pipe, using ultrasonic inspection techniques. The corrosion rates require the piping to be rejected. However, if the joint efficiency were increased the system would be acceptable

A. It is not possible to increase the joint efficiency for existing piping systems B. The system may be radiographed to accordance with ASME B 31.3 and the joint efficiency increased. C. The system may be ultrasonically inspected in accordance with ASME B 31.3 and the joint efficiency

increased D. Both B and C

Section/page _____________________ Reference Publication__________________ 69. Thickness testing of small connections such as nipples can be performed by ________

A. UT digital gauges B. MT C. PT D. Hammer testing

Section/page _____________________ Reference Publication__________________ 70. underground piping, 8 ft. below grade is excavated for inspection:

A. An “intelligent pig” must be used B. A remote video camera must be used C. NACE RP 0169 must be referred D. The sides of the trench should be shored


Section/page _____________________ Reference Publication__________________ 71. As a standard technique, the temperature of the penetrant and the surface of the part to be processed shall not be

above ________________

A. 125°F B. 50°F C. 32°F D. 81°C

Section/page _____________________ Reference Publication__________________ 72. When valve body and/or closure pressure tests are performed after servicing, they should be conducted in

accordance with:

A. API 598 B. API 798 C. NACE RP 0169 D. ASME B 31.3

Section/page _____________________ Reference Publication__________________ 73. The minimum thickness at each TML can be located by ultrasonic scanning or ________

A. Hammer testing B. radiography C. Magnetic particle testing D. Penetrant testing

Section/page _____________________ Reference Publication__________________ 74. During the calibration of MT equipment the lifting power of an DC yoke must be at least ____________

A. 100 lbs. B. 40 lbs. C. 10 lbs. D. 5 lbs.

Section/page _____________________ Reference Publication__________________ 75. Lines that sweat are susceptible to deterioration at areas of _________________

A. High point vents B. supports C. high temperature D. low temperature

Section/page _____________________ Reference Publication__________________ 76. Services that are flammable but do not significantly vaporize when they leak and are not located in high-activity

areas are labeled _________________

A. Class 1 B. Class 2 C. Class 3 D. Class 4

Section/page _____________________ Reference Publication__________________ 77. During PT test, final interpretation shall be made within what time range?

A. 7 to 60 min B. 30 to 60 min C. 60 to 120 min D. anytime after 24 hours


Section/page _____________________ Reference Publication__________________ 78. Who shall provide the materials, equipment, quality control, and workmanship necessary to maintain and repair the

piping systems in accordance with the requirements of API 570?

A. Piping engineer B. Repair organization C. inspector D. operator

Section/page _____________________ Reference Publication__________________ 79. What is the proper dimension for a cross section which is to be subjected to a Charpy V-notch impact test?

A. 1/2” square B. 10 M square C. 10 mm square D. 0.505” square

Section/page _____________________ Reference Publication__________________ 80. When inspecting piping in an operating unit, protective equipment shall be worn when required by regulation or by:

A. The inspector judgment B. The owner C. The fire department D. This is not a requirement

Section/page _____________________ Reference Publication__________________ 81. A pipe welder successfully passes a 6 GR pipe test, the welder is qualified to weld which of the following

A. Pipe groove welds B. Fillet welds on pipe C. Anything that can be welded D. 6 GR is not recognized by ASME

Section/page _____________________ Reference Publication__________________ 82. In compliance with API 570, potable water follows U.S practice which allows:

A. 2,500 parts per million maximum chloride B. less than 1 part per million maximum chloride C. 250 parts per million maximum chloride D. There is no maximum chloride requirement

Section/page _____________________ Reference Publication__________________ 83. When the United States Coast Guard requires a system to be pressured tested, care should be taken to avoid

_________, if the system is subject to thermal expansion.

A. Under pressure B. Excessive pressure C. Pneumatic pressure testing is required in this situation D. Pipe “shrinkage”

Section/page _____________________ Reference Publication__________________ 84. Procedure and performance tests examined by PT shall be judged unacceptable when the examination exhibits any

indication in excess of ______________

A. Linear indications less than 1/16” long B. Rounded indications 3/16” in diameter C. Three relevant rounded indication in a line separated by 1/8 D. Ä relevant linear indication


Section/page _____________________ Reference Publication__________________ 85. The owner of buried piping should conduct surveys of the surface conditions on and adjacent to each pipeline path

every _________________.

A. 6 months B. 12 months C. yearly D. 5 years

Section/page _____________________ Reference Publication__________________ 86. Radiographic film density shall be checked by a densitometer calibrated on a step wedge film traceable to

____________

A. API 650 B. ASNT SNT TC-1A C. ASME Section IX D. A national standard

Section/page _____________________ Reference Publication__________________ 87. Gate valves larger than NPS 2 usually have ___________

A. Full port openings B. An “S” seat area C. A restricted full-open port D. A venture-gate

Section/page _____________________ Reference Publication__________________ 88. Filler metals, for piping welds, shall conform to the requirements of?

A. AWS A5.1 B. ASME Section IX C. ASME Section V D. API 570

Section/page _____________________ Reference Publication__________________ 89. During the inspection of S/A interface, excavation was required, what is he minimum depth required?

A. 1 inch to 5 inches B. 6 inches to 12 inches C. 13 inches to 19 inches D. Inspector desecration

Section/page _____________________ Reference Publication__________________ 90. If gate valves are known to be exposed to corrosion/erosion, thickness readings should be taken in an area of high

turbulence and stress, usually:

A. On the gate B. On the stem C. On the outlet side connection D. Between the seats



API 570 Model question-4 The following is a collection of questions remembered by various students who took API 570 exam in the past. The answers will be found in the following reference publications API Standard 570 Piping inspector code API Recommended practice 574 ASME Boiler & Pressure vessel code Sec.V Non-destructive examination Sec.IX Welding and brazing qualifications ASME B 16.5 Pipe flanges & Flanged fittings ASME B 31.3 Process Piping 91. A point in the repair or alteration process beyond which work may not proceed until the required inspection has

been performed and documented is called a(n) ___________

A. Hold point B. Inspection point C. Wait for the inspector and charge extra period D. Thickness measurement location

Section/page _____________________ Reference Publication__________________ 92. The exposed surface of a weld on the side from which the welding was done is called the weld ______________

A. Cap B. toe C. face D. root

Section/page _____________________ Reference Publication__________________ 93. A term which indicates that a provision is recommended as good practice but not a code requirement.

A. must B. may C. shall D. should

Section/page _____________________ Reference Publication__________________ 94. With post-emulsifying penetrants the emulsification time is _______________

A. Based on water pressure B. Not as important as the dwell time C. To be calculated based on surface temperature D. To be determined experimentally



95. The person responsible to the owner-user for activities involving design, engineering review, analysis or evaluation of piping systems covered by API 570 is a(n) ___________

A. Piping engineer B. Repair organization C. inspector D. operator

Section/page _____________________ Reference Publication__________________ 96. The person responsible to the owner-user for determining that the requirements of API 570 for inspection,

examination, and testing are met is a(n) _____________

A. Piping engineer B. Repair organization C. API Authorized Piping Inspector D. Operator

Section/page _____________________ Reference Publication__________________ 97. In compliance with API 570, who has control of the activities relating to the rerating, repair, and alteration of its

piping systems?

A. Repair organization B. Operations C. Owner-user inspection organization D. Maintenance craftsmen

Section/page _____________________ Reference Publication__________________ 98. Terminology for weld metal in excess of the specified weld size.

A. Weld reinforcement B. Good weld technique C. Weld toe D. Weld throat

Section/page _____________________ Reference Publication__________________ 99. Which valve is used to automatically prevent backflow?

A. Gate valve B. Globe valve C. Check valve D. Slide valve

Section/page _____________________ Reference Publication__________________ 100. Designated areas on piping systems where periodic inspections and thickness measurements are conducted are

called _______________

A. TP B. TML C. MT D. PT

Section/page _____________________ Reference Publication__________________ 101. A flanged joint is composed of three separate components, the gasket, the bolting and _____________________

A. The coating B. The flange face finish C. The flange identification D. The flange



102. The certification agency for API 570 is the __________________

A. American Welding Society B. American Petroleum Institute C. American Production In-Service Group D. American Piping Inspecton

Section/page _____________________ Reference Publication__________________ 103. During the calibration of MT equipment, the lifting power of an AC yoke must be at least ____________

A. 100 lbs. B. 40 lbs. C. 10 lbs. D. 5 lbs.

Section/page _____________________ Reference Publication__________________ 104. During the fluorescent MT test, the black light intensity shall be measured at least once every ____________

A. hour B. 2 hours C. 4 hours D. 8 hours

Section/page _____________________ Reference Publication__________________ 105. When a pipe qualification coupon for welders or welding operators has failed radiographic examination, the

immediate retest shall be by radiographic examination. The weld length shall be _________________

A. One complete pipe weld B. Two complete pipe weld C. Two pipe welds for a total of 12” of weld D. Two 12” plate coupons

Section/page _____________________ Reference Publication__________________ 106. What percentage of all suspect areas and areas of damaged insulation should be inspected for a Class 3 system that

is within susceptible temperature ranges?

A. 100% B. 75% C. 50% D. 10%

Section/page _____________________ Reference Publication__________________ 107. What is the heat treatment holding time based on hour per inch of carbon steel 1¼” thick?

A. 2.4 hr/in B. 1.5 hr/in C. 1.0 hr/in D. 0.5 hr/in


MAWP (This information applies to question 108-120, where applicable)

Design pressure/temperature

Pipe description

Thickness from Inspection

Corrosion Rate

Class 1

564 psi/900°F

NPS 12, Sch.160, A 285 Gr.B, A672 Class 23

0.997”

0.023 inches/year


108. What is the MAWP of the system?

A. 864.07 psig B. 86.407 psig C. 664.7 psig D. 66.47 psig

Section/page _____________________ Reference Publication__________________ 109. Can a 5 year inspection interval be performed?

A. Yes because the MAWP at the next inspection is 864.07 psig B. Yes because the MAWP at the next inspection is 664.07 psig C. Yes because the MAWP at the next inspection is 66.47 psig D. No because the MAWP at the next inspection is 564 psig

Section/page _____________________ Reference Publication__________________ 110. What is the minimum required thickness of the system listed above?

A. 1.312” B. 1.112” C. 0.997” D. 0.650”

Section/page _____________________ Reference Publication__________________ 111. Calculate the long term corrosion rate of the system listed above based on: 5 year interval: third cycle.

A. 0.023” B. 0.021” C. 0.112” D. 0.997”

Section/page _____________________ Reference Publication__________________ 112. Calculate the short term corrosion rate of the system listed above, based on

t previous = 1.112” t last = 0.997” 5 year interval: third cycle

A. 0.023” B. 0.021” C. 0.112” D. 0.997”

Section/page _____________________ Reference Publication__________________ 113. Calculate the remaining life of the system listed above.

A. Less than 1 year B. 5 years C. 10 years D. 15 years

Section/page _____________________ Reference Publication__________________ 114. What is the calculated thickness of a 150 pound, NPS 8 flanged “T”

A. 0.030” B. 0.060” C. 0.130” D. 0.310”



115. What is the outside diameter of a gasket type E-2 for the fitting in question 114?

A. 10.62” B. 8.62” C. 12.12” D. 12.62”

Section/page _____________________ Reference Publication__________________ 116. What is the P number for the pipe in question 108?

A. 1.5 B. 1 C. 6 D. 24

Section/page _____________________ Reference Publication__________________ 117. What is the Group number for the pipe in question 108?

A. 1.5 B. 1 C. 6 D. 24

Section/page _____________________ Reference Publication__________________ 118. What is the SFA number for E-7048 electrode?

A. 5 B. 5.1 C. 5.29 D. 5.42

Section/page _____________________ Reference Publication__________________ 119. What is the filler number for E-7018 electrodes?

A. 1 B. 2 C. 3 D. 4

Section/page _____________________ Reference Publication__________________ 120. What is the position designation for welding pipe in the horizontal fixed position?

A. 2G B. 3G C. 5G D. 6G



API 570 Model question- 1 to 4 Answer Key

The following is a collection of questions remembered by various students who took API 570 exam in the past. The answers will be found in the following reference publications API Standard 570 Piping inspector code API Recommended practice 574 ASME Boiler & Pressure vessel code Sec.V Non-destructive examination Sec.IX Welding and brazing qualifications ASME B 16.5 Pipe flanges & Flanged fittings ASME B 31.3 Process Piping

API 510 Model question-1 to 4 answer key Mohan Raj Page 1 of 3

No

Answer

Reference:

No

Answer

Reference:

1 A 6.4 Fig.7 B 31.3 31

2 32

3 33

4 34

5 35

6 36

7 37

8 38

9 39

10 40

11 41

12 42

13 43

14 44

15 45

16 46

17 47

18 48

19 49

20 50

21 51

22 52

23 53

24 54

25 55

26 56

27 57

28 58

29 59

30 60


No

Answer

Reference:

No

Answer

Reference:

61 91

62 92

63 93

64 94

65 95

66 96

67 97

68 98

69 99

70 100

71 101

72 102

73 103

74 104

75 105

76 106

77 107

78 108

79 109

80 110

81 111

82 112

83 113

84 114

85 115

86 116

87 117

88 118

89 119

90 120


combined model 14

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