API 570 Practice exam
The following is a collection of questions made from API-570 syllabus. The answers will be found
in the reference publications mentioned in API-570 body of knowledge
This is the "Open Book" portion of the exam. Feel free to use any of the following
1.
Determine the MAWP of the following piping system , at the next inspection, based on the following
Design pressure/temperature
100 psig/100°F
Pipe description
NPS 2, Sch.80, A 106 B
Outside diameter of pipe, D
2.375”
Thickness determined from Inspection
0.190”
Observed Corrosion Rate
0.03 inches/year
Next planned inspection
5 Years
MAWP: _____________
A.
B.
C.
D.
674 psig
323 psig
125 psig
Metal loss exceeds the requirements for 5 year inspection interval
2.
What is
A.
B.
C.
D.
the pressure design thickness of NPS 10, A516 Gr.65 Type 22 pipe that operate at 1200 psig/750°F
0.432”
0.46”
0.928”
Not enough information given
3.
A leak test is an alternative to inspection of buried piping. What is the minimum liquid pressure to adequately conduct
this test?
A. 1 1/2 times the MAWP
B. 1 1/4 times the MAWP
C. 10% greater than MAWP
D. Actual MAWP
4.
For a single wall material thickness, over 0.375” through 0.50”, what is the hole type designation for a source side
penetrameter
A. 15
B. 17
C. 20
D. 25
5.
Give the corresponding “P” number for SA 414 Gr.A material
A. 1
B. 2
C. 3
D. 11B
6.
On a class 1500 NPS 4 blind flange, what is the minimum thickness permitted?
A. 1.12”
B. 1.88”
C. 2.12”
D. 2.88”
7.
For 1 1/4” thick carbon steel, what is the recommended preheat temperature?
A. 300°F
B. 235°F
C. 175°F
D. None
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8.
Determine the MAWP of the following piping system , at the next inspection, based on the following
Design pressure/temperature
100 psig/100°F
Pipe description
NPS 20, Sch. std, A 106 B
Outside diameter of pipe, D
20”
Thickness determined from Inspection
0.280”
Observed Corrosion Rate
0.02 inches/year
Next planned inspection
5 Years
MAWP= ______________
A. 160 psig
B. 550 psig
C. 723 psig
D. 125 psig
9.
What is
A.
B.
C.
D.
the inspection interval for buried piping without cathodic protection, the soil resistivity is 6,500 ohm-cm?
10 years
15 years
5 years
whenever a leak is suspected
10. What is
system?
A.
B.
C.
D.
11. What is
A.
B.
C.
D.
the maximum length allowed for individual slag trapped in a weld in a Severe Cyclic Conditions piping
>TW X 3
≤TW / 3
≥12T
3/23”
the design thickness of NPS 2 ½, SA106 Gr.B pipe that operates at 25 psi / 200°F
0.275”
0.100”
0.002”
not enough information given
12. With respect to Category ‘D’ service, what is the maximum allowable undercut for a branch connection?
A. Zero (no evident imperfections)
B. ≤ 1/32”
C. ≤ 1 mm
D. Both B and C
13. What is the test pressure of a metallic piping system whose design temperature is above the test temperature using
the following conditions? NPS 6, SA106 Gr.B, 100 psi / 800°F
A. 150 psi
B. 450 psi
C. 278 psi
D. Test temperature verses design temperatures are not different
14. Determine the MAWP of the following piping system, at the next inspection, based on the following
Design pressure/temperature
100 psig/750°F
Pipe description
NPS 6, A285 C EFW, Straight Seam(No radiography)
Outside diameter of pipe, D
6 5/8”
Thickness determined from Inspection
0.280”
Observed Corrosion Rate
0.01 inches/year
Next planned inspection
5 Years
MAWP= ______________
A.
B.
C.
D.
522
487
878
125
psig
psig
psig
psig
15. Impact testing of each form of material for any specification shall be done using procedures and apparatus in
accordance with
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A.
B.
C.
D.
ASTM A 370
ASME Section V
API 570
AWS D 1.5
16. In the AWS D 5.1, what is the designation for cellulose DCEP electrode?
A.
E 7018
B.
E 7016
C.
E 6011
D.
E 6010
17. With respect to a Class 400, NPS 12 slip on raised face flange, whose edges of the gasket do not extend to the bolt,
what is the outside diameter of the gasket?
A. 12.75”
B. 15.00”
C. 16.50”
D. 18.00”
18. The base metal is P.No.8, the weld metal is A. No.8-9, and the wall thickness is 1”, what is the hold time for heat
treatment
A. None
B. 1 hour
C. 2 hours
D. ½ hour for each 1” thickness
19. On the regularly furnished Class 300 raised face flange, what is the height of the raised face?
A. 0.06”
B. 0.09”
C. 0.19”
D. 0.25”
20. During a welder qualification test on 3/8” plate in the horizontal position, how many guided bends are required?
A. 6 side bends
B. 2 nick breaks
C. 1 face and 1 root bends
D. 4 tensile specimens
21. When inspecting a Class 3 system, what percentage of all suspect areas and areas of damaged insulation should be
examined?
A. 10%
B. 33%
C. 50%
D. 100%
22. A welder who tests on a ½” thick plate, groove weld in the 3G position is also qualified to weld in which other plate
position?
A. Vertical only
B. Flat and horizontal
C. Flat
D. All plate positions
23. After hot bending and forming, heat treatment is required for which P numbers?
A. 3,4,5, 6 and 10A
B. 1, 2 and 7
C. 11ASG1 and 11ASG2
D. 1,2,8,9A and 98
24. A piping system that operates at a design pressure of 100 psi at 950° F was originally built from NPS 20 EFW (100%
radiographed), ½” wall, A-516 Grade 70, A-671 material. During the last Inspection, the thickness was determined to
be 0.370 inches. The records indicated the corrosion rate to be 0.009 inches per year. What is MAWP if the next
inspection is planned in 5 years?
A. 126 psi
B. 285.17 psi
C. 98.23 psi
D. Not enough information given
25. Can the
A.
B.
C.
D.
inspection interval of the system in question 24 be increased to 8 years?
No
Yes
If the system was insulated, the interval can be extended
Not enough information given
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26. What the MAWP is recalculated, the wall thickness used shall be the actual thickness minus:
A. The estimated corrosion loss before the date of the next inspection
B. Twice the estimated corrosion loss before the date of the next inspection
C. Three times the estimated corrosion loss before the date of the next inspection
D. The estimated corrosion loss before the date of the next inspection
27. The base metal is P No.1, the weld metal is A No.1, and the wall thickness is 7/8”. What is the holding time at 11001200°F for heat treatment
A. 1 hour
B. 2 hours
C. 3 hours
D. Procedure is not required for this thickness
28. What is the required thickness of straight run pipe subject to internal pressure only, based on the following
conditions: NPS 14, SA 285 Gr.C, EFW Spiral seam (No radiography), operating at 216 psi / 378°F
A. 0.11”
B. 1.1”
C. 0.06”
D. Not enough information given
29. The radiograph of a Normal Fluid service piping weld revealed a crack. What is the acceptable crack length if the pipe
wall was 0.375?
A. None
B. T/3
C. 3/16"
D. Cracks will not show on radiographs
30. Geometric unsharpness of the radiograph of a component under 2" th1ck shall not exceed _________
A. 0.020"
B. 0.030"
C. 0.040"
D. 0.050"
31. What is the maximum Brinell hardness of base metal P-6?
A.
241
B.
270
C.
281
D.
not specified
32. What is
A.
B.
C.
D.
the minimum holding time of SA-106 Grade B, 1 inch thick material?
2.4 hours
2 hours
1 hour
not specified
33. What is
A.
B.
C.
D.
the working pressure of a 150 Ib. flange, SA 350 Gr.LF6 CL 1, used at 400°F?
230 psig
200 psig
170 psig
140 psig
34. What is
working
A.
B.
C.
D.
the minimum class flange that can be used if the material is SA 351 Gr.C F8C, temperature 950°F and
pressure is 1930 psig
800
900
1500
This material can not be used at this temperature
35. The preheat zone shall extend beyond each edge of a pipe weld
A. 1”
B. 2”
C. 2T
D. 3T
36. What is
A.
B.
C.
D.
the root face limitation as listed on the attached WPS and PQR
3/32”
1/8”
No limit
Not designated
37. If the supporting PQR is used, are the P-no’s correct on the attached WPS?
A. Yes
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B.
C.
D.
No
Could be if properly preheated
Not enough information
38. Is the thickness range on the WPS supported by the PQR?
A. Yes
B. No
C. Re qualification is required by API 570
D. Re qualification is required by ASME Section V
39. Is the attached PQR properly qualified?
A. No, because RT is not allowed during PQR qualification
B. No, because there are not enough tensile tests
C. No, because peening is allowed by ASME B31.3
D. Yes
40. What should have been the correct number and type of guide bends on the PQR?
A. 6 side bends
B. 2 face and 2 root bends
C. 1 side, 1 face and 1 root bend
D. No side bends required
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The reminder of the exam is “Closed Book”.
The use of reference publication is not permitted.
41. According to API 570, a(n) ___________ is a person who assists the inspector by performing specific NDE testing.
A. NDE technician
B. Inspector assistant
C. Level II inspector
D. Examiner
42. More than one contractor, manufacturer or installer may simultaneously qualify a welder. In such case, each
participating organization shall be represented by ______________ during the test.
A. A certified welding inspector
B. A responsible employee
C. The welder’s supervisor
D. A welding engineer
43. Which of the following best describes API 574?
A. code
B. Standard
C. specification
D. Recommended practice
44. The potential for personnel exposure is deemed to be significant in which fluid service?
A. Category M fluid service
B. High pressure fluid service
C. Normal fluid service
D. Category B fluid service
45. When an injection point circuit for the purpose of inspection is designated, the recommended up stream limit of the
injection point circuit shall be the greater of ___________ ?
A. minimum 12 inches
B. maximum 12 inches
C. three pipe diameters
D. both A and C
46. ___________ can cause flame detectors used to indicate a furnace or boiler fire to give false indications on control
panels.
A.
Welding or related repairs on piping
B.
Piping alterations in the shop
C.
Ultrasonic inspection
D.
Radiographic inspection
47. After application of a non destructive evaluation technique, any resulting evidence is commonly referred to as ______
A. A crack
B. porosity
C. a leak
D. an indication
48. API 570
A.
B.
C.
D.
applies to piping systems for process fluids such as:
Firewater
Plumbing, sanitary sewers and storm sewers
Raw, intermediate, and finished products.
Piping systems on trucks, ships and barges
49. Which of the following applies to socket welds in piping systems?
A. Should be avoided
B. Should be used in all welded piping
C. Should be welded using SAW only
D. Should be avoided where crevice corrosion may occur
50. Each piece of magnetizing equipment shall be calibrated _________
A. at the beginning of each shift
B. at least once a year or whenever the equipment has been subject to major electrical repair
C. whenever the technician feels like it
D. at least once every 90 days
51. An individual who holds an engineering degree is automatically qualified as __________.
A. an authorized piping inspector
B. a piping Inspector
C. a NDE Level II or III in any technique
D. None of the above
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52. What is the definition of normalizing?
A. Rapid cooling of a heated metal
B. Heating an alloy to a suitable temperature, holding that temperature long enough to allow constituents to
enter into solid solution and then cooling ~ rapidly enough to hold the constituents.
C. Process where a ferrous metal is heated to a suitable temperature above the transformation range and is
subsequently cooled in still air at room temperature.
D. Heating to and holding at a suitable temperature and then cooling at a suitable rate to reduce hardness,
improve machinability, facilitate cold working, etc.
53. What does the acronym MAWP refer to?
A. Maximum internal pressure permitted in the piping system
B. Minimum internal pressure permitted in the piping system
C. Maximum external pressure permitted in the piping system
D. Maximum external stress permitted in the piping system
54. Penrtrameters (IQls)
with ASME.
A. black-type
B. step wedge
C. hole-type
D. pica-type
shall either be _________or _______ and shall be manufactured and identified in accordance
white-type
calibration block
wire-type
elite-type
55. When environmental or operating conditions produce snow and ice loads, these are considered to be ___________.
A. Dead loads
B. live loads
C. environmental loads
D. structural loads
56. The downstream limit of the injection point circuit is the second change in flow direction past the injection point or:
A. 25 feet beyond the first change
B. 50 feet beyond the first change
C. 100 feet, if the pipe is straight run
D. No downstream requirement
57. Appropriate permanent and progressive records on each piping system shall include ___________.
A. all original construction data
B. all jurisdictional requirements
C. original heat and batch numbers
D. system service; classification; identification numbers
58. Piping subject to CUI includes piping insulated for personnel protection, especially:
A. plastic piping
B. glass lined piping
C. carbon steel piping systems
D. carbon steel piping systems operating between 25°F-250°F
59. A leak test was performed on a buried piping system. The system was re pressured to 125 psi four hours into the
test. Sometime during the final four hours, the gauge fell 5
A. The piping system failed.
B. The piping system passed
C. The test must be repeated
D. The piping system must be visually inspected
60. What is
A.
B.
C.
D.
the most common use for a globe valve?
Prevent back flow
Allow full flow
Stop all flow
Regulate fluid flow
61. What is
A.
B.
C.
D.
the minimum lifting power of an AC electromagnetic yoke used in magnetic particle inspection?
40 pounds lifting power at the maximum pole spacing
10 pounds lifting power at the maximum pole spacing
10 amps lifting power at the maximum pole spacing
30 pounds lifting power at the minimum pole spacing
62. Excessive cyclic stresses that are well below the static yield strength of the material result in _________.
A. material failure
B. fatigue cracking
C. failure cracking
D. creep cracking
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63. A welder may be qualified by AT in any welding process except for which of the following?
A. GMAW (short circuiting mode)
B. GMAW (spray arc mode)
C. FCAW
D. SMAW
64. Austenitic stainless steel piping systems operating between 150°F-400°F are susceptible to:
A. temper embrittlement
B. chloride stress corrosion cracking
C. CUI
D. Both B and C
65. What classification does the majority of unit process piping fall in to?
A. Class 3
B. Class 2
C. Class 1
D. Owner/user designated system
66. _______ provides general requirements and detailed assessment procedures for specific types of degradation that are
referenced in API 570.
A. API 598
B. API 653
C. API RP 579
D. ASME 816.5
67. Welding
A.
B.
C.
D.
procedures qualified by ____________ may be used, subject to the specific approval of the inspector
others
the employer
the use of AWS pre qualified, D1.1 type procedures
the use of API 1104 qualified procedures
68. A weld is changed from multi pass per side to single pass per side. How does this effect the PWHT limitation?
A. This limitation does not apply when a WPS is qualified with a PWHT above the upper transformation
temperature
B. This limitation does not apply when a WPS is qualified with a PWHT below the upper transformation
temperature
C. The PWHT is not a consideration
D. The PWHT must be performed per ASME IX and time increased byone
69. Besides
A.
B.
C.
D.
ultrasonic instruments, what other method can be used to determine thickness measurements?
AET
ET
MT
RT
70. Which of the following methods can be used to join cast iron pipe?
A. Welding
B. Compression
C. Epoxy resin
D. Bell and spigot
71. Buried piping inspected periodically by excavation shall be inspected in lengths of:
A. 3 feet -5. feet
B. 6 feet -8 feet.
C. Any length as long as It IS Inspected full circumference.
D. Any length as long as it is inspected 180° circumference.
72. In a piping circuit, which of the following does not routinely have thickness measurements taken?
A. Valves
B. Straight Run Pipe
C. Fittings
D. Dead legs
73. What is
A.
B.
C.
D.
the maximum measurement for open defects in the weld or heat affect zone for a guided bend specimen?
1/16"
1/8"
3/16"
No open defects are allowed
74. What is a thermocouple pyrometer?
A. A device used to check the heat treatment temperature, usually connected by capacitor discharge welding
B. A device taped to the pipe that will record temperature variations
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C.
D.
A flammable material that, when ignited, will create enough heat to stress relieve piping
A vibration device that generates heat through friction producing a stress relieved weldment
75. What is
A.
B.
C.
D.
the acceptable method to temporarily repair a longitudinal crack in an existing piping system?
Installing a full encirclement welded split sleeve
Welding over the crack
Welding a box over the cracked area
Using a full encirclement welded spilt sleeve, with the approval of the piping engineer
76. Erosion
A.
B.
C.
D.
of the piping system usually occurs at:
Elbows
Along straight run pipe
Upstream of pump discharges
Any low-velocity and low-turbulence areas
77. An operator notice a pipe off its support, what should be done?
A. Ignore the situation
B. Report the situation to engineering or inspection personnel
C. Keep a record of the situation for future reference
D. Contact maintenance personnel for immediate repair
78. When heat treating welded joints between dissimilar ferritic metals, the temperature range shall be for which metal?
E. The one with the higher temperature range
F. The one with the lower temperature range
G. The average of both materials
H. Either one may be used
79. Bolts should extend ______ during the installation of flanged connections.
A. two threads past their nuts
B. completely through their nuts
C. only half way through their nuts
D. at least 0.5 inches (12.7 mm) past their nuts
80. When a
expire
A.
B.
C.
D.
welder has not welded with a process during a period of _______ , his qualifications for that process shall
3 months or more
6 months or more
9 months or more
12 months or more
81. Rerating piping systems may be allowed only if the calculations are performed by _________
A. the piping engineer or the inspector
B. the plant manager
C. an outside engineering firm
D. a third party inspection organization
82. Temperatures above _____________ can damage transducers not equipped with delay line material.
A. There is no limit to temperature
B. manufacturer's specification
C. 280 psi
D. 1,000 psi
83. Where should the numbers be placed on a radiograph?
A. Under the film
B. On the material being radiographed
C. Under the material being radiographed
D. On the film source pack
84. Radiographic
A. NPS
B. NPS
C. NPS
D. NPS
profile techniques are preferred over ultrasonic thickness measuring instruments for pipe diameters of:
1 'and over
2 and over
1 and under
2 and under
85. A _________ pipe has the highest potential of resulting in an immediate emergency if a leak were to occur.
A. Class 3
B. Class 2
C. Class 1
D. Owner/user designated system
86. A WPS shall have the ____________ referenced
A. welder
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B.
C.
D.
87. What is
A.
B.
C.
D.
88. A piping
A.
B.
C.
D.
PQR
NACE
PDQ
the most common method used to manufacture tubing?
Riveted
Seamlessly drawn
Wire drawn
Forged
inspector employed by the owner operator shall have ___________
an API 653 certification
an AWS certification
an API 510 certification
not less than 10 years experience dealing with piping
89. Repair materials shall be verified for conformance to the applicable code and shall be compatible with the original
material by the ____________.
A. inspector
B. piping engineer
C. repair organization
D. the purchasing department
90. The letter "B" is placed on radiographic film holder for what reason?
A. To determine if back scatter radiation is exposing the film
B. To show the distance from the source of radiation to the weld
C. To function as a location marker for the radiograph
D. To designate whether the penetrameter is on the film side or the back side
91. A visual
A.
B.
C.
D.
examination of performance test coupons shall ___________.
show complete joint penetration and complete fusion of weld metal and base metal
show no more than 1/3t inadequate penetration
show no more than 1/3t non fusion
be allowed one 5/32" crater crack
92. Piping systems that are not located in high activity areas and do not significantly vaporize are designated as _____.
A. Class 3
B. Class 2
C. Class 1
D. Owner/user designated system
93. Of the following examples, which one may cause a leak in a threaded joint?
A. Back welding the fitting
B. Lack of thread lubricant
C. Under pressuring the part
D. Changing the direction of flow in the piping system
94. Penetrameters are normally placed on the __________ side of the part being examined.
A. source
B. film
C. weld
D. reverse
95. What is
A.
B.
C.
D.
the maximum thickness measurement inspection interval for an injection point?
3 years
5 years
10 years
By Class
96. Exemptions for preheating and post weld heat treatment must be approved by the __________.
A. piping engineer
B. inspector
C. applicable standard, API 570
D. repair procedure.
97. A welder qualified to weld in accordance with one qualified WPS is also qualified to weld __________.
A. using the same welding process within the limits of the essential variables
B. any other qualified weld procedure
C. using a different welding process of a qualified weld procedure
D. any WPS developed and tested by the welder's employer
98. The formula t = PD/2SE computes the __________.
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A.
B.
C.
D.
Minimum required piping thickness
maximum piping thickness
minimum piping thickness
average piping thickness
99. What document may be used as a guide when examiners are being qualified by their employer?
A. ASME Section IX
B. ASM E Section V
C. ASNT SNT- TC-1A
D. API 570
100.
The minimum allowable thickness of a piping component shall be based on __________.
A. pressure, mechanical and structural considerations
B. previous experience of the owner
C. corrosiveness of the product only
D. availability of piping materials
101.
What
A.
B.
C.
D.
102.
Why should a leaking threaded joint not be tightened while the system is in service?
A. The craftsman should not be near the threaded connection
B. Rust or corrosion might be holding the pressure
C. The joint might be unscrewed
D. A crack in a thread root might fail
103.
The repair organization shall maintain records of welding procedures and welder qualifications and make the
records available to the inspector ___________.
A. prior to the start of welding
B. any time during welding
C. after completion of welding
D. when the repair organization releases the information
104.
A transverse crack was discovered in the root pass of a completed weld on the outside of a Category D Fluid Service
piping system during a PT test. Which of the following," statements is most accurate?
A. The weld is acceptable
B. The PT test should be repeated
C. The welder should be requalified
D. The PT test will not show this type of discontinuity from the outside
105.
The transmitted film density through the radiographic image of the body of the appropriate hole penetrameter and
the area of interest shall be ______ minimum for radiographs made with a gamma ray source.
A. 1.8
B. 2.0
C. 2.2
D. 2.6
106.
Care should be taken not to ______ during a pressure test.
A. allow any inert gas into the system
B. use water in the system
C. over-pressure the system
D. under-pressure the system
107.
In evaluating blisters and laminations in piping, assessments should be performed in accordance with ______.
A. API RP 579, Section 7
B. API RP 2207, Section 2
C. API 598, Section 1
D. ASME 816.5
108.
An area defined by a circle having a diameter not greater than 2 inches for a line diameter not exceeding 10 inches,
in which thickness readings may be averaged is
A. TML
B. WFMT
C. Test point
D. Averaging point
109.
The liquid penetrant examination method is an effective means for detecting ________.
A. internal discontinuities of a weld
B. surface discontinuities of a weld
is the prescribed alignment for the inside surfaces of circumferential welds to be groove welded?
± 1/16"
± 1/32"
Within the dimensional limits in the WPS
The fabricator's discretion
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C.
D.
both Internal and surface discontinuities of a weld
subsurface discontinuities of a weld
110.
To evaluate the effects of fire damage, an assessment should be performed in accordance with________.
A. API RP 579, Section 11
B. API RP 2207 Section 2
C. API 598, Section 1
D. ASME 816.5
111.
The repair organization shall use welders and welding operators qualified in accordance with the code to which the
piping was built or alternatively ___________.
A. ASME B 31.3
B. ASME Section V
C. AWS D 1.1
D. API 1104
112.
When an entire piping assembly is to be heat treated, but it will not fit into the furnace, what action should be
taken?
A. Heat treat in more than one heat, with a 1” overlap
B. Heat treat as much as possible and hardness test the untreated area
C. Radiograph the untreated area
D. MT the untreated area
113.
What
A.
B.
C.
D.
114.
A qualified welder may seal weld a threaded joint if __________.
A. the joint is leaking
B. the joint has straight threads only
C. the joint has tapered threads only
D. all exposed threads are covered
115.
Actively engaged as an authorized piping inspector shall be defined as a minimum of ___________ time spent
performing inspection activities.
A. 20%
B. 30%
C. 40%
D. 50%
116.
An inspector is evaluating a radiograph, a light image of a "B" appears on a darker background of the radiograph,
the ___________.
A. radiograph shall be considered unacceptable
B. radiograph should not be rejected
C. "B" is for identification of the welder
D. "B" is for identification of the weld
117.
All piping system repair and alteration welding shall be done in accordance with:
A. ASME BPV IX
B. ASME B31.G
C. API 570
D. The code to which the system was built.
118.
A piping system started with a wall thickness of 0.375 inches. Over a five year period the wall thickness is now
0.1”. What is the long term corrosion rate?
A. 0.055 inches per year
B. 0.005 inches per year
C. 550 Inches per year
D. Not enough information given
119.
Given
A.
B.
C.
D.
the above information, what is the short term corrosion rate of the above piping system?
0.055 inches per year
0.005 inches per year
550 Inches per year
Not enough information given
120.
When
A.
B.
C.
testing cast iron pipe which of the following methods should not be used?
Radiographic test
Leak test
Ultrasonic test
is the maximum allowable deviation for the ammeter on each piece of magnetizing equipment?
30%
10%
20%
15%
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D.
Hammer test
121.
Lower
A.
B.
C.
D.
levels of soil resistivity are:
Less corrosive than higher resistivity soils.
More corrosive than higher resistivity soils
Has no effect on corrosion.
More desirable because of increased electrolyte.
122.
When
A.
B.
C.
D.
may welding not be performed?
If the weld area is frosted or wet
If the weld area is above 120° F
If the weld area is in an inert atmosphere
If the weld area is not in direct sunlight
123.
The minimum required pipe wall thickness or retirement thickness shall be based on pressure, mechanical and
structural considerations using the appropriate design formulae and __________.
A. code allowable stress
B. assumption stress
C. nil-weight ductility stress
D. CTOD stress
124.
The weld ripples of reinforcement of butt-welded joints shall be ________ before radiography.
A. removed
B. ground flush, with grinding direction parallel to the weld
C. ground flush, with grinding direction perpendicular to the weld
D. removed if irregularities mask discontinuities
125.
In lieu of the required heat treatment after welding, what may be used as an alternative?
A. Normalizing/annealing
B. Quenching
C. Air Hardening
D. Strain Harmonics
126.
A piping system has a corrosion rate of 0.074 inches per year, the actual wall thickness is 0.370 inches and the
minimum required thickness is 0.1 inch. What is the remaining life?
A. 36.48 years
B. 364.8 years
C. 3.6 years
D. 3.6 months
127.
The inspector shall approve all repair and alteration work at designated times, referred to as ___________.
A. hold points
B. work stop points
C. inspection delay points
D. inspector's discretion
128.
Who is authorized to make a tack weld?
A. A qualified welder
B. A helper
C. A fitter
D. The welding foreman
129.
The acronym CUI refers to ___________.
A. Corrosion Under Insulation
B. Cold Under-ground In-service piping
C. Corrosion Under Inside flow
D. Carpet Under Infra-structure
130.
API 570 was developed to provide _____________ for the inspection of in-service process piping.
A. recommendations
B. suggestions
C. general guidelines
D. an industry standard
131.
During a MT examination, __________ shall be performed on each area.
A. 100% coverage at the required sensitivity
B. a calibration of each piece of magnetizing equipment
C. at least three separate examinations
D. prod spacing of at least
132.
An API authorized piping inspector certificate is valid for _____ years from its date of issuance
A. 3
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B.
C.
D.
4
5
unlimited
133.
Peening of the weld is prohibited on what part of the weld?
A. Root and final pass
B. Intermediate passes
C. Along the toe of the weld
D. Within 1" of the weld area
134.
The outside diameter of piping in high-temperature service, about 800°F, should be measured to check for _______
A. creep
B. diameter enlargement
C. swelling
D. internal product build-up
135.
A specialized valve generally used in erosive or high-temperature service is a __________ valve
A. swing check
B. slide
C. plug
D. globe
136.
Cracks caused by vibration, thermal cycling, thermal expansion problems and environmental cracking are
considered ______________.
A. in-service cracks
B. material cracks
C. delayed cracks
D. HAZ cracks
137.
Who has the responsibility for qualifying welding procedures?
A. Each employer
B. Each subcontractor
C. Each welder
D. Each contractor
138.
A DC
A.
B.
C.
D.
139.
API 570 covers the inspection of _________.
A. new construction
B. new tank construction
C. In-service piping
D. In-service vessels
140.
Hammer testing of piping is a common practice. However, which of the following should never be hammered?
A. Cast iron piping
B. Caustic piping
C. All welded piping
D. Both A and B
141.
Aboveground piping is subject to atmospheric corrosion. What is buried piping subject to?
A. Erosion
B. Anodic reaction
C. Soil electrolytes
D. Soil corrosion
142.
When
A.
B.
C.
D.
143.
The type of joints generally limited to piping in non critical service NPS 2 and smaller is ___________.
A. butt welded
B. brazed
C. threaded
D. clamped
yoke shall have a lifting power of at least __________
5 lbs.
8 lbs.
10 lbs.
40 lbs.
can welding procedures qualified by other than the employer be used?
When there is specific approval of the inspector
When the job contract gives authorization
When the procedure is used only one time
When the production weld is radiographed
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144.
Welding repairs of cracks that occurred in-service should not be attempted without prior consultation with the
______
A. piping engineer
B. inspector only
C. plant manager
D. welding foreman
145.
The preferred medium for pneumatic testing of small lines or systems is __________
A. air
B. water
C. inert gas
D. hydrogen
146.
Without the benefit of an impact test, what is the minimum operating temperature for A-106 Grade B material used
in a Category D Fluid Service?
A. -29°F
B. -20°C
C. -20°F
D. 0°F
147.
The valve used to automatically prevent back flow is ___________ valve.
A. gate
B. slide
C. globe
D. ball check
148.
All proposed methods of design, execution, materials, welding procedures, examination and testing must be
approved by the __________.
A. inspector or piping engineer
B. inspector only
C. plant manager
D. new construction contracts
149.
In piping systems, the most easily detected problem during operation is _____________.
A. pipe wall thickness
B. pipe wall thinness
C. pipe coating condition
D. leaks
150.
The three well-known methods of determining soil resistivity are, soil bar, soil box and _________.
A. A-C Bridge
B. six pin method
C. holiday pipe survey
D. Wenner (4-pin) method
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