Piping Inspector API 570 Questions and Answers

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1. Which of the following are least likely to experience corrosion under insulation (CUD)?

A. Areas subject to process spills, moisture, and/or acid vapors.
B. Areas exposed to mist from cooling towers
C. Piping systems that operate above 250 degrees F
D. Areas exposed to steam vents

2. Which of the following descriptions best identifies the cracks expected in corrosion observed during a visual inspection for a chlorine leak that has been dripping on an austenitic pipe?

A. Following the grain boundaries
B. Transgranular and branching
C. Bright and faceted
D. A pattern of carbon stringers

3. The preferred method for inspecting piping injection points involves:

A. visual inspection and ultrasonics
B. ultrasonics and/or acoustic emission testing
C. eddy current and/or radiography
D. radiography and/or ultrasonics

4. When dial-type indicating and recording pressure gauges are used to monitor leak testing, the maximum gauge range shall not exceed which multiple of the expected test pressure?

A. 1 ½ times
B. 2 ½ times
C. 3 times
D. 4 times

5. An NPS 1½ level bridle on a propane storage drum shall undergo thickness measurements.

A. At intervals not to exceed 10 years or half the remaining life, whichever is sooner
B. At intervals not to exceed 5 years or half the remaining life, whichever is sooner
C. Only when corrosion rates exceed 5 mils per year
D. Optionally

6. Inspection records contain the following information for a particular thickness measurement location (TML) in a return bend. What is the long term corrosion rate for the location? Thickness year 0.500 0.425 0.400 0 5 10

a. 1½ mils per year
b. 5 mils per year
c. 10 mils per year
d. 100 mils per year

7. Which of the following defines the term hold point?

a. A pipe hanger that utilizes springs and sliding shoes to accommodate expansion and contraction.
b. A dog welded onto piping and used to align joints prior to welding
c. A point beyond which work may not proceed until inspections have been performed and documented
d. A trunnion, gimbal, or sliding shoe used for piping support

8. Heat treatment is required for all thickness of piping over ½ inch for which of the following material?

a. P Nos. 1 and 2
b. P Nos. 1 and 3
c. P Nos. 2 and 3
d. P Nos. 4 and 5

9. A welder has made 25 SMAW groove welds, but the guided bend test for the welder’s qualification was never performed. In order to avoid cutting out all of the production welds made by this welder, which of the following minimum steps would be taken to validate the qualification?

A. radiograph the welder’s first production weld and accept the qualification based on acceptable weld quality by radiography.
B. There is no alternative to qualifying a welder by the guided bend test.
C. Have the welder prepare a test coupon and have the bend test done on that.
D. Radiograph all 25 welds, regardless of the governing specifications for sample selection.

10. Elbows are typically inspected on the outside and inside radius due to which of the following damage mechanism.

A. environmental cracking
B. soil-to-air interface
C. erosion/corrosion
D. corrosion under insulation

11. A dead leg could best be described as_____

A. an intermediate piece of piping
B. an inlet or outlet elbow next to a pump
C. a dummy support leg
D. a branch line with a blind or blank flange

12. The recommended method for thickness determination on piping 1” and smaller is

A. ultrasonics
B. eddy current
C. profile radiography
D. none of the above are recommended

13. The temperature above which some form of compensation for ultrasonic thickness readings should be made is

A. 100 deg. C
B. 150 deg. F
C. 200 deg. F
D. none of the above

14. When surveying the thickness measurement location, the minimum thickness should be obtained by

A. using a 1” diameter probe
B. taking one reading at each TML
C. scanning around the TML
D. using profile radiography in two directions

15. When using a search unit on a hot surface, it is a good idea to try and cool the transducer because:

A. excessive heat will slow down the pulse rate.
B. excessive heat will increase the pulse rate.
C. excessive heat may de-polarize the piezoelectric diodes.
D. excessive heat can de-polarize the piezoelectric element.

16. A material property which could cause a false thickness reading using a digital thickness meter is

A. small grain size
B. widely scattered small inclusions
C. irregular shaped pits
D. rolling lamination

17. You are inspecting a vessel with an apparently heavy paint build-up. In many areas you are unable to obtain a back wall signal and you have not noticed any appreciable thinning. The most likely reason would be

A. the vessel wall is excessively thin.
B. the instrument will not read through the thick paint.
C. the couplant is bleeding into the paint the paint is not adhered well
D. none of the above would cause the problem.

18. Many digital thickness meters contain a ‘button’ of steel used to calibrate the instrument. This button’ is typically used for

A. calibrating the instrument for thickness readings on steel
B. testing the couplant adequacy
C. calibrating the instrument for thickness readings on stainless
D. adjusting the search unit to the instrument to compensate for faceplate wear

19. Digital thickness gages should be checked periodically for linearity and proper function.

A. TRUE
B. FALSE

20 Where would the most likely area on a pipe elbow be that would be the thinnest after many years of service?

A. sides
B. inside radius
C. outside radius
D. next to the welds

21. When taking thickness readings on small diameter piping, it is good practice to use a flat step wedge.

A. True
B. False

22. Stagnant fluid, as opposed to flowing, in a pipe would affect the thickness reading.

A. True
B. False

23. When calibrating the instrument:

A. the instrument pulse rate is adjusted to the velocity of the material being measured.
B. the velocity of sound is changed in the test plate.
C. the pulse length of the transducer is adjusted to the material thickness
D. none of the above

24. When measuring thickness on hot material, errors can occur due to:

A. velocity changes in the material
B. velocity changes in the dual transducer material
C. de-polarization of the element material
D. all of the above

25. Search units that operate at low frequencies are not usually used for measuring thin materials.

A. True
B. False

26. Dual element search units typically have the piezoelectric elements mounted at some fixed angle to the axis of the housing. This is to provide:

A. a short pulse transit time
B. compensation for the pulse repetition rate
C. focus the sound beam at some point in the material
D. ease of manufacture since they are difficult to build E. none of the above

27. Since digital thickness meters do not have a ‘range’ or material control, to compensate for material velocity as found on A-scan instruments, thickness readings can only be taken on carbon or stainless steels.

A. True
B. False

28. Some digital thickness meters can measure velocity in the material.

A. True
B. False

29. When performing short period inspections with digital thickness gages it is good practice to calibrate or check calibration

A. at the beginning of the inspection
B. at the end of the inspection
C. at frequent periods of usage, such as every 2 hours
D. all of the above

30. Thickness readings should only be taken on thin wall piping or vessels when they are out of service because the liquid inside will transmit sound and could cause incorrect readings.

A. True
B. False

31. When placing a dual element search unit on small diameter piping, the line which separates the elements should be aligned

A. across the curvature of the pipe
B. with the length of the pipe
C. at a 45 deg. angle to the curvature of the pipe
D. at any convenient orientation

32. An inside surface condition of a pressure vessel which could cause the most inaccurate thickness reading is

A. epoxy lining
B. thin clad material
C. heavily pitted surface
D. A and B

33. When performing thickness measurements on 2” diameter Sch. 40 pipe, which of the following transducers would be the best selection?

A. ¼” diameter, 2 MHz
B. ¼” diameter, 5MHz
C. ½” diameter, 2.25 MHz
D. ¾” diameter, 1 MHz

34. You are measuring thickness on a steel tank. After completing the examination, you go inside the tank and notice that there is thick scale on the interior. Your measurements have included the thickness of the scale.

A. True
B. False

35. You change from using Ultragel to Sonotech couplant. Is it necessary to perform a calibration check?

A. Yes
B. No

36. There are three methods listed for calibration of instruments when using delay line transducers

A. True
B. False

37. You are to take thickness readings on piping for a full 8-hour shift. How many calibrations or verifications should be performed as a minimum?

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

38. An examination is to be performed on new plates for thickness and soundness evaluation. A thickness meter with a waveform display is available for use. Would this be acceptable?

A. Yes
B. No

39. When performing thickness measurements in a range from 4” to 8” to this procedure the calibration block may be a:

A. basic calibration block (7” thick)
B. type 2 IIW block (V1)
C. step wedge (0.25”-1”)
SD. a and b above

40. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 12” diameter standard wall pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see undercut that is 1/32” at the deepest point. In addition, the height of reinforcement at the highest point is 1/8”. (t=0.375”)

A The weld is acceptable as is
B. Weld repair of the undercut is required
C. blending down of the weld reinforcement is required
D. both B & C are required

41. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 12” diameter standard wall pipe. The acceptance standard is ANSI B31.3 severe cyclic service. You see undercut that is 1/32” at the deepest point. In addition, the height of reinforcement at the highest point is I/8”. (t= 0.375”)

A. The weld is acceptable as is
B. Weld repair of the undercut is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

42. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 12” diameter standard wall pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see undercut that is 1/32” at the deepest point. In addition, the height of reinforcement at the highest point is 1/8”. (t= 0.375”)

A. The weld is acceptable as is
B. Weld repair of the undercut is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

43. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 20” diameter standard wall pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see undercut that is 1/32” at the deepest point. In addition, the height of reinforcement at the highest point is 1/8”. (t=0.375”)

A. The weld is acceptable as is
B. Weld repair of the undercut is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

44. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 20” diameter standard wall pipe. The acceptance standard is ANSI B31.3 severe cyclic fluid service. You see undercut that is 1/32.” at the deepest point. In addition, the height of reinforcement at the highest point is 1/8”. (t= 0.375”)

A. The weld is acceptable as is
B. Weld repair of the undercut is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

45. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 20” diameter standard wall pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see undercut that is 1/32” at the deepest point. In addition, the height of reinforcement at the highest point is 1/8”. (t= .375”)

A. The weld is acceptable as is
B. Weld repair of the undercut is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

46. You are performing a visual inspection1on the final welded surface of a socket weld in 2” diameter schedule 80 pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see lack of fusion that is 1/32” at the deepest point. In addition, there is a crack in the toe of the weld 0.312” long. (t=0.218”)

A. The weld is acceptable as is
B. Weld repair of the lack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

47. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter schedule 80 pipe. The acceptance standard is ANSI B31.3 severe cyclic service. You see lack of fusion that is 1/32” at the deepest point. In addition, there is a crack in the toe of the weld 0.312” long. (t= 0.218”)

A. The weld is acceptable as is
B. Weld repair of the lack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

48. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter schedule 80 pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see lack of fusion that is 1/32” at the deepest point. In addition, there is a crack in the toe of the weld 0.312” long. (t= 0.218”)

a. The weld is acceptable as is
b. Weld repair of the lack of fusion is required
c. Weld repair of the crack is required
d. both B) &C) are required

49. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 8” diameter standard wall pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16”. (t= 0.322”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

50. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 8” diameter standard wall pipe. The acceptance standard is ANSI B31.3 severe cyclic service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16” (t= 0.322”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

51. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 8” diameter standard wall pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16”. (t= 0.322”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

52. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 10” diameter standard wall pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16” (t=0.365”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

53. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 10” diameter standard wall pipe. The acceptance standard is ANSI B31.3 severe cyclic fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long: In addition, the height of reinforcement at’ the highest point is 3/16” (t= 0.365”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

54. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 10” diameter standard wall pipe. The acceptance standard is ANSI 831.3 category D fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16” (t= .365”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

55. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter schedule 40 pipe. The acceptance standard is ANSI 831.3 normal fluid service. You see lack of fusion that is 1/16” at the deepest point and 1.25” long. In addition, there is a crack in the toe of the weld 0.312” long (t= 0.154”)

A. The weld is acceptable as is
B. Weld repair of the lack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

56. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter schedule 40 pipe. The acceptance standard is ANSI B31.3 severe cyclic service. You see lack of fusion that is 3/16” at the deepest point. In addition, there is a crack in the toe of the weld 0.312” long (t= 0.154”)

A. The weld is acceptable as is
B. Weld repair of the lack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

57. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter schedule 40 pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see lack of fusion that is 1/32” at the deepest point and 0.250” long. In addition, there is a crack in the toe of the weld 0.312” long. (t= 0.154”)

A. The weld is acceptable as is
B. Weld repair of the lack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

58. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 8” diameter sch. 80 pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. in addition, the height of reinforcement at the highest point is 3/16” (t= .500”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

59. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 8” diameter sch. 80 pipe. The acceptance standard is ANSI B31.3 severe cyclic service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16”. (t= .500”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

60. You are performing a visual inspection on the final welded surface of a butt weld (girth & miter groove category) in 8” diameter sch. 80 pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. in addition, the height of reinforcement at the highest point is 3/16”. (t= .500”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

61. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 10” diameter sch. 80 pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see incomplete penetration that is 1/16”. at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16”. (t= .500”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

62. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 10” diameter sch. 80 pipe. The acceptance standard is ANSI B31.3 severe cyclic fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16”. (t= 0.500”)

A. The weld is acceptable at is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

63. You are performing a visual inspection on the final welded surface of a seam weld (longitudinal groove category) in 10” diameter sch. 80 pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see incomplete penetration that is 1/16” at the deepest point and 1.25” long. In addition, the height of reinforcement at the highest point is 3/16”. (t= 0.500”)

A. The weld is acceptable as is
B. Weld repair of the incomplete penetration is required
C. blending down of the weld reinforcement is required
D. both B) & C) are required

64. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter sch 10S pipe. The acceptance standard is ANSI B31.3 normal fluid service. You see lack of fusion that is 1/16” at the deepest point and 1.25” long. In addition, there is a crack in the toe of the weld 0.312” long. (t= 0.109”)

A. The weld is acceptable as is
B. Weld repair of the lack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

65. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter sch 10S pipe. The acceptance standard is ANSI B31.3 severe cyclic service. You see lack of fusion that is 3/16” at the deepest point. In addition, there is a crack in the toe of the weld 0.312” long. (t= 0.109”)

A. The weld is acceptable as is
B. Weld repair of the lack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

66. You are performing a visual inspection on the final welded surface of a socket weld in 2” diameter sch 10S pipe. The acceptance standard is ANSI B31.3 category D fluid service. You see lack of fusion that is 1/32” at the deepest point and 0.250” long. In addition, there is a crack in the toe of the weld 0.312” long. (t= 0.109”)

A. The weld is acceptable as is
B. Weld repair of the Zack of fusion is required
C. Weld repair of the crack is required
D. both B) & C) are required

67. Which of the following weld discontinuities would most likely be detected by visual inspection?

a. Crater cracking
b. Slag inclusion
c. Tungsten inclusion
d. Gas pores

68. Which of the following casting discontinuities would be most likely detected by VT?

a. Sand inclusions
b. Gas pores
c. Misrun
d. Unfused chaplet

69. Which of the following are forging discontinuities that would be detectable visibly?

a. Lack of fusion
b. Forging lap
c. Internal forging burst
d. Shrinkage cavities

70. A metal joining process carried out at a temperature of 900°F would be classified as:

a. soldering
b. brazing
c. welding
d. casting

71. Which of the following are machining induced discontinuities that could be detected visibly?

a. heat treatment cracks
b. plating cracks
c. grinding cracks
d. all of the above

72. How many “thousandths of an inch” are there in 1 mm approximately?

a. 1000
b. 25
c. 40
d. 50

73. The three categories of possible discontinuity introduction are

a. inherent, processing, and in-service
b. primary processing, machining, and final heat treat
c. inherent, primary processing, and secondary processing
d. primary processing, secondary processing, and in-service

74. Corrosion is

a. an electrochemical reaction
b. an electro mechanical reaction
c. a chemical mechanical reaction
d. an electrostatic reaction.

75. Corrosion relies on which chemical element?

a. Oxygen
b. Hydrogen
c. Nitrogen
d. Sodium

76. What type of corrosion is most likely to be found at a joint of two dissimilar materials?

a. Grain boundary
b. Pitting
c. Galvanic
d. Exfoliation

77. What type of corrosion is most likely to be detected on a riveted lap joint subjected to fatigue?

a. stress corrosion cracking
b. galvanic corrosion
c. exfoliation corrosion
d. fretting corrosion

79. A dark fine line detected visibly at the root of a used flange mounting bolt thread, would probably indicate

a. fatigue crack
b. hydrogen embrittlement
c. a forging lap
d. shrinkage cracking

80. A suspect crack indication is detected visually on an piping system manifold. The area is to be further investigated using other NDT methods. How should the suspect area be marked?

a. The extremities of the indication should be marked with a grease pencil
b. The extremities of the indication should be marked with a lead pencil
c. The extremities of the indication should be marked with a layout scriber
d. The extremities of the indication should be marked with an Indian ink pen

81. The two main methods of producing threads on bolts are

a. rolling and machining
b. casting and rolling
c. machining and forging
d. casting and machining

82. Typical corrosion types associated with fasteners are

a. galvanic, crevice fretting
b. high temperature, exfoliation, fretting
c. exfoliation, fretting, galvanic
d. pitting, crevice, fretting

83. Loss of base metal on sliding surfaces due to abrasion is an example of:

A. Wear
B. Distortion
C. Fatigue
D. Stress Corrosion

84. A discontinuity is

a. a flaw which renders the part defective
b. always caused at the liquid/metal solidification stage
c. an interruption in the normal physical structure of a part
d. always cause for rejection

85. What is the meaning of “tolerance”?

a. A standard for degree of inspection needed.
b. The two extremes within which an actual part dimension must lie
c. The ideal dimension of a part feature
d. The amount of material that must be removed for desired fit

86. Surface roughness is measured in units of:

a. mils
b. micro inches
c. inches
d. feet

87. Visual acuity is the ability of the eye to:

a. resolve details.
b. perceive light intensity.
c. distinguish between different colors.
d. retain images after the light source is removed.

88. A distinct advantage of a fiberscope over a borescope is that a fiberscope is:

a. lightweight
b. rigid
c. simpler to use
d. flexible

89. Necessary lighting for visual examination:

a. is not a problem since most work spaces generally have adequate illumination
b. is about the same as for reading
c. must be provided by incandescent lamps
d. must be provided by fluorescent lamps

90. Service induced discontinuities in fasteners could be caused by:

a. vibration.
b. tension.
c. corrosion.
d. all of the above.

91. A variation or interruption in the normal physical structure or configuration of a part is called a:

a. flaw
b. discontinuity
c. defect
d. fault

92. A condition that is of such size, shape, type and location that it is detrimental to the useful service of the part is called:

a. flaw
b. discontinuity
c. defect
d. fault

93. The forging process often causes laps which can sometimes be mistaken for:

a. bursts
b. pipe
c. cracks
d. porosity

94. Loss of wall thickness can be caused by:

a. corrosion and erosion.
b. pitting and wear
c. galling and abrasion
d. all of the-above.

95. Severe grinding cracks appear as:

a. wave-like patterns
b. widely spaced cracks
c. lattice work or checkerboard patterns
d. deep crevices

96. Welding preheat and interpass temperatures are commonly measured by which of the following:

a. by observing the melting of a temperature indicating crayon
b. by observing the color of the heated metal
c. by contact pyrometers
d. both a and c

98. Standard practices require that threads of bolts or studs project past the end of the nut to provide:

a. on the head
b. under the head
c. end of the bolt shank (opposite the head)
d. just above the top thread

99. Which of the following discontinuities seldom discovered during a visual exam?

a. crack
b. incomplete penetration
c. undercut
d. tungsten inclusion

100. Un-fused chaplets are associated with:

a. forging
b. rolling
c. extruding
d. casting

101. Laminations are generally:

a. linear and parallel with the surfaces of a plate
b. linear and perpendicular with the surfaces of a plate
c. linear and randomly oriented in a plate
d. characterized by containing inclusions

102. The term “creep” refers to:

a. low temperature embrittlement
b. a progressive movement of a crack
c. reduction of wall thickness by corrosion or erosion
d. metal deformation under steady load at elevated temperatures

103. Indications caused by repeated loading, bending or by vibrating stresses are called:

A. Mass hardness
B. Lamellar testing
C. Hot tears
D. Fatigue cracks

104. A group of joining processes which produces coalescence of materials by heating them to a suitable temperature and by using filler metal having a liquidus below 450°C (840°F) and below the solidus of the base metal is called:

a. Brazing
b. Soldering
c. Resistance welding
d. Arc welding.

105. SCC is a synergistic action of.

a. Steel and cracks
b. Stress and corrosion
c. Structure and coatings
d. Slag and craters.

106. Embrittlement is:

A. Affected by high temperatures
B. Affected by low temperatures
C. Affected by both high and low temperatures
D. Not affected by temperatures

107. Pitting corrosion can be initiated by:

A. Restricted fluid access
B. Cavitation
C. Abrasive wear
D. Stress.

108. Shrinkage cavities are normally found in:

a. Castings
b. Forgings
c. Plates
d. Bars

109. Embrittlement is the severe loss of ductility of a metal resulting from:

a. Fatigue
b. Erosion:
c. In-service environments
d. Cavitation

110. Laps in a forging can easily be mistaken for

A. Porosity
B. Cracks
C. Bursts
D. Pipe

111. Laminations in rolled products are found on ______ of the finished shape:

a. The face
b. The edge
c. The corner
d. Both the face and edge

112. Corrosion attack in the form of pits is called:

a. Localized corrosion.
b. Galvanic corrosion.
c. Erosion corrosion.
d. Inter-granular corrosion

113. Cavitation usually occurs on or near the:

a. bearings
b. impeller
c. shaft
d. rings

114. Cavitation:

a. Occurs only with the collapse of the gas-vapor bubble
b. Begins with the bubble formation and extends to the collapse of the cavity
c. Occurs when the system pressure adjacent to a flow boundary is reduce d below the vapor pressure of the liquid
d. Is caused by a gradual drop in pressure

115. Necking-down” results front

a. Overloading
b. Folding of metal
c. Extrusion
d. Insufficient ductility

116. Typical corrosion damage would not include:

A. Cracked welds.
B. Frozen bearings.
C. Deep pits.
D. Rust.

117. Excessive pump vibration can be caused by:

a. Rotating element unbalance
b. Worn or loose parts
c. Misalignment
d. All of the above

118. Which of the following is true?

a. all discontinuities are defects
b. defects that affects the products usefulness are called discontinuities
c. discontinuities that affect the product’s usefulness are called defects
d. all discontinuities are unacceptable

119. Fatigue cracks often begin at:

A. section changes
B. thread roots
C. weld toes
D. notches
E. any of the above

120. Thermal fatigue is caused by:

a. fluctuating stress
b. overheating
c. fluctuating temperature
d. overloading

121. To examine areas around bends in pipe sections, you might use a:

a. bore scope
b. telescope
c. fiberscope
d. microscope

122. Burst can develop during rolling or:

a. casting
b. drawing
c. forging
d. piercing

123. During the rolling process, nonmetallic inclusions can develop into:

a. stringers
b. cold laps
c. tears
d. bursts

124. Surface roughness is measured in units of: REPEATED

a. mils.
b. microinches
c. inches.
d. feet

125. The surface finish of a part may be described by:

a. length
b. area
c. roughness
d. fit

126. The maximum diameter of a hole specified as 2.375”+/-0.005” is”

a. 2.375”
b. 2.370”
c. 2.390”
d. 2.380”

127. Maximum and minimum value on a dimension are called:

a. diameters
b. finishes
c. tolerances
d. fits

128. The symbol 125√ represents:

a. diameter
b. surface finish
c. part length
d. angle of bend

129. How many 32nds are there in one inch?

a. 8
b. 32
c. 64
d. 100

130. An example of the permanent mold process is:

a. sand casting
b. investment casting
c. die casting
d. shell mold casting

131. A lamination can result from rolling an ingot that contains piping or:

a. glass
b. flaks
c. inclusions
d. seams

132. Which of the following is an example of an inherent discontinuity?

a. inclusion
b. fatigue crack
c. stress cracking
d. grinding checks

133. Wrought products can be made:

a. only by rolling
b. by the hot or cold working process
c. only by the cold working process
d. only by the hot working process

134. Porosity is:

a. gas entrapped below the surface of a metal
b. gas entrapped below or at the surface of a material
c. foreign crystalline material entrapped below the surface of a material
d. material used during the welding process

135. Of those listed, the most accurate mechanical tool used to measure plate thickness is a:

a. steel tape
b. micrometer
c. feeler gauge
d. steel ruler

136. The two types of examination mirrors are:

A. dental and industrial
B. dental and moveable
C. industrial and fixed
D. fixed and dental

137. Light intensity for visual inspection is usually specified in units of:

A. angstroms
B. photon energy
C. foot candles
D. watts

138. Which of the following discontinuities would you expect to find in weldments?

a. Blow holes
b. Piping
c. Bleed-out
d. Transverse cracks

139. The thread pitch gage is used to determine:

a. the diameter of threads
b. the number of threads per inch
c. the thread pitch angle
d. both B and C

140. Stress corrosion cracking is often found in:

a. carbon steel in caustics
b. stainless steel in ammonia
c. brass in high-purity water
d. high-nickel alloys in halogens

141. A folded thin flap on a forging is called:

a. cold shut
b. forging porosity.
c. a crack
d. a forging lap

142. Primary process discontinuities are caused during

a. machining
b. rolling
c. grinding
d. heat treating

143. Shrinkage cavities may be present if the product was formed by:

a. explosive forming
b. extrusion
c. forging
d. casting

144. Which of these optical aids can be used in direct visual examination?

a. Mirrors
b. Fiber scopes
c. Cameras
d. All of the above

145. What type of drawing is three-dimensional?

A. isometric
B. composite
C. flow
D. P& ID

146. which of the following is a discontinuity associated with visual examination of bolting?

A. Erosion
B. Stripped threads
C. Shearing tears near bolt head
D. All of the above

Top 41 Latest API 570 Exam Questions and Answers

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1. API 570 covers inspection of :

A. new construction
B. new tank construction
C. in-service piping
D. in-service vessels

2. CUI is the acronym for :

A. Corrosion Under Insulation
B. Cold under-ground In-service piping
C. Corrosion Under Inside flow
D. Crack under Insulation

3. A person who assists the inspector by performing specific NDE on piping systems is defined as

A. NDE Technician
B. Assistant Inspector
C. NDT Level II inspector
D. Examiner

4. The response or evidence resulting from the application of a nondestructive evaluation technique is termed:

A. A crack
B. Porosity
C. A leak
D. An indication

5. The MAWP is:

A. The maximum internal pressure permitted in the piping system.
B. The minimum external pressure permitted in the piping system.
C. The maximum external pressure permitted in the piping system.
D. None of the above

6. A selection of piping encompassed by flanges or other connecting fittings is called:

A. A flanged pipe
B. A ready to be installed pipe
C. A spooled piece
D. A fabricated piping assembly

7. If a person has a degree in engineering he is automatically qualified to be:

A. An Authorized Piping Inspector
B. A piping inspector
C. A NDE Level II or III in any technique
D. None of the above

8. A TML is:

A. Thickness Measurement Laboratory
B. The Maximum Limit for thickness
C. Thickness Measurement Location
D. Time Medium Length

9. The result of excessive cyclic stresses that are often well below the static yield strength of the material is termed as:

A. material failure
B. fatigue cracking
C. failure cracking
D. creep cracking

10. Thickness measurements may be taken by ultrasonic instruments or what other method:

A. AET
B. ET
C. MT
D. RT

11. Which of the following tests are not normally conducted as part of a routine inspection:

A. UT thickness
B. Visual inspection
C. Radiographic profile
D. Pressure tests

12. Thickness measurements are not routinely taken on in piping circuits.

A. valves
B. straight run pipe
C. fittings
D. deadlegs

13. During the installation of a flanged connection, the bolts should:

A. Extend two threads past their nuts
B. Extend completely through their nuts
C. Extend only half way through their nuts
D. Extend at least .5 inches (1.25 mm) past their nuts.

14. Services with the highest potential of resulting in an immediate emergency if a leak were to occur are in:

A. Class 3
B. Class 2
C. Class 1
D. Owner/user designated system

15. The classification that includes the majority of unit process piping is labeled:

A. Class 3
B. Class 2
C. Class I
D. Owner/user designated system

16. Services that are flammable but do not significantly vaporize when they leak and are not located in high activity areas:

A. Class 3
B. Class 2
C. Class I
D. Owner/user designated system

17. What is the remaining life in years of a piping system whose corrosion rate is 0.074 inches per year, the actual wall thickness is 0.370 inches and the minimum required thickness is 0.1 inches

A. 36.68 years
B. 364.8 years
C. 3.6 years
D. 3.6 months

18. What is the long term corrosion rate of a piping circuit that started at 0.475 inches and is now 0.2 inch, the measurements were taken over a five year period.

A. 0.055 inches per year
B. 0.005 inches per year
C. 0.550 inches per year
D. Not enough information given

19. What is the short term corrosion rate for the above piping circuit in Question 18.

A. 0.055 inches per year
B. 0.005 inches per year
C. 0.550 inches per year
D. Not enough information given

20. A longitudinal crack in an existing piping circuit may be repaired by:

A. installing a full encirclement welded split sleeve
B. welding a box over the cracked area
C. welding a box over the crack
D. using a full encirclement welded split sleeve, with the approval of the piping engineer.

21. Soil to air interface Zone of a partially buried pipe is defined as

A. 6 inches above and 12 inches below the soil surface
B. Pipe running parallel with the soil surface is also included
C. 12 inches below and 6 inches above the soil surface
D. A and B above

22. API 570 was developed for

A. Petroleum refining and chemical process industry
B. Ship building industry
C. Power plant industry
D. Construction Industry

23. API 570 shall be used as a substitute for the original construction requirement governing a piping system before it is placed in service wherever possible.

A. True
B. False

24. API 570 applies to the piping systems for

A. Process fluids
B. Hydrocarbons and similar flammable and toxic fluid service
C. Sour water and hazardous waste streams above threshold limit
D. All of the above
E. Only A and B

25. Excluded and Optional piping system to API 570 requirements are

A. Fire water system
B. Hazardous fluid service below the threshold limit as defined by jurisdictional requirement.
C. Steam and boiler feed water service
D. Category D fluid service
E. All of the above

26. A imperfection of a type or dimension exceeding the acceptable criteria is defined as

A. Defect
B. Discontinuity
C. Lack of continuity
D. All of the above

27. The test point area for a8 “ NPS pipe is

A. 3” Dia Circle
B. 2” Dia Circle
C. 5” Dia Circle
D. None of the above

28. Who shall control activities related the repair, rerating and alteration of the piping system

A. Owner or User
B. Authorized Inspection Agency
C. Approved Inspection Agency
D. Any authorized piping Inspector

29. Who shall control the inspection program, frequency and maintenance of the Piping System?

A. Owner or User
B. Authorized Inspection Agency
C. Approved Inspection Agency
D. Any authorized piping Inspector

30. Who shall be responsible for the functions of the authorized Inspection Agency?

A. Owner or User
B. Authorized Inspection Agency themselves
C. Approved Inspection Agency
D. Any authorized piping Inspector
E. Regulatory authority or Class

31. As regards dead legs in piping circuits, what is recommended to be done by API 570 when ever possible?

A. Dead legs should be monitored on a monthly basis.
B. The chief inspector and the unit engineer should designate dead legs to be inspected.
C. Dead legs should be monitored on a yearly basis
D. Consideration should be given to removing dead legs that serve no further process purpose.

32. Which of the following is an not an example of environmental cracking?

A. Chloride SCC of austenitic stainless steels
B. Polythionic acid SCC of sensitized austenitic alloy steels.
C. Carbonate SCC. D. Low Temperature SCC.

33. An example of where creep cracking has been experienced in the industry is in;

A. 2-114 Cr steels above 800°F.
B. 1-114 Cr steels above 900°F.
C. 2-114 Cr steels above 900°F.
D. Chrome Vanadium steels above 1000°F.

34. Rerating piping systems is defined as;

A. changing the temperature rating.
B. changing the MAWP.
C. changing the temperature rating or the MAWP.
D. re-painting the pipe with the correct pressure and temperature

35. WFMT is

A. Wet Ferro magnetic testing
B. Wet Flourescent Magnetic Particle testing
C. Buried piping testing
D. Special internal testing

36. When preparing to inspect a piping system inspection personnel should?

A. Consult with the piping engineer.
B. Briefly review the history of individual piping systems before making any of the inspections required by API 570.
C. Check that repair materials are available.
D. Check that the corrosion engineer has reviewed the inspection plan.

37. As regards dead legs in piping circuits, what is recommended to be done by API 570 when ever possible?

A. Dead legs should be monitored on a monthly basis.
B. The chief inspector and the unit engineer should designate dead legs to be inspected.
C. Dead legs should be monitored on a yearly basis
D. Consideration should be given to removing dead legs that serve no further process purpose.

38. When is it necessary to reevaluate the frequency of inspection for an existing piping system?

A. The API 570 authorized inspector suspects a problem.
B. The operations group desires an increase in inspection frequency.
C. The inspection interval must be reviewed and adjusted as necessary after each inspection or significant change in operating conditions.
D. More than one flange has started to leak.

39. The selection of TMLs within injection point circuits are established at four basic locations, three of which are:

 TMLs on appropriate fittings within the injection point circuit.
 TMLs on the pipe wall at the location of expected pipe wall impingement of injected fluid
 Establish TMLs at both the upstream and downstream limits of the injection point circuit.
What is the fourth consideration when selecting TMLs

A. TMLs at intermediate locations along the longer straight piping within the injection point circuit may be required
B. TMLs at extreme locations along the longer straight piping within the injection point circuit may be required
C. TMLs at pipe bends within the longer straight piping in the injection point circuit may be required
D. TMLs at pipe bends within the shorter straight piping in the injection point circuit may be required

40. When the inspector suspects or is advised that specific circuits may be susceptible to environmental cracking, the inspector should schedule supplemental inspections. What types of inspections may this include?

A. Radiography.
B. Wet Fluorescent Magnetic Particle NDE.
C. Ultrasonic NDE.
D. Radiography, Wet Fluorescent Magnetic Particle, and/or Ultrasonic examinations.

41. Suplemental inspection for piping systems are sometimes required. Which of the following may be considered supplements to normal inspection techniques?

A. Annual hydrostatic testing.
B. Eddy current testing.
C. Spool piece removal and visual inspection
D. Periodic use of radiography and/or thermography to check for fouling or internal plugging.