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API 510 practice questions

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Cuestionario de practica para estándar 510
Roberto Herrera
Quiz by Roberto Herrera, updated more than 1 year ago
Roberto Herrera
Created by Roberto Herrera almost 9 years ago
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Resource summary

Question 1

Question
The application of AP I 510 is restricted to organizations that:
Answer
  • Fabricate or build pressure vessels according to ASME B&PV Code
  • Employ or have access to an authorized inspection agency.
  • Manufacture or inspect pressure vessels according to NBIC.
  • Hire or have access to an unsanctioned inspection agency.

Question 2

Question
API 510 Inspection Code is only applicable to pressure vessels used by the petroleum and chemical process industries that:
Answer
  • are being fabricated for the petroleum/chemical industries.
  • can be fabricated to ASME B&PV Code and inspected by NBIC inspectors
  • will be place in service after fabrication to the ASME B&PV Code
  • have been placed in service; inspected and/or repaired by an authorized agency.

Question 3

Question
Which of the following is an example of a pressure vessel covered by API 510. (AII of the vessels are in-service).
Answer
  • Pressure vessel on an ocean-going ship, operates at 100 psig & 100° F.
  • Pressure vessel in an oil refinery, operates at 5 psig and 70° F.
  • Pressure vessel in an oil refinery, operates at 100 psig and 200° F.
  • Pressure vessel in an oil refinery, vol. of 4 cU. ft., & operates at 70 psig and 70° F.

Question 4

Question
If there is a conflict between the ASME Code and API 510 for vessels that have been placed in service, the requirements of:
Answer
  • API 510 shall take precedence over the ASME Code
  • ASME Code shall take precedence over API 510.
  • NBIC shall be used as arbitration Code
  • The owner/user shall take precedence over both Codes

Question 5

Question
One type of Authorized Inspection Agency is:
Answer
  • An inspection organization that does inspections.
  • An insurance/inspection agency which does not write pressure vessel insurance.
  • An owner/user of pressure vessels who maintains an inspection organization only for his own equipment.
  • An independent third party consultant.

Question 6

Question
The term "minimum allowable shell thickness" is the thickness:
Answer
  • essential for the shell and heads of a vessel.
  • required for each element of a vessel.
  • necessary for the shell of a vessel.
  • including the corrosion allowance for the shell of a vessel.

Question 7

Question
Lowering of the maximum allowable working pressure or temperature rating of a vessel or both below the design conditions is:
Answer
  • A not a permissible way to provide for corrosion.
  • The preferred way to provide for corrosion.
  • The only way to keep a vessel in service when it is corroded.
  • A permissible way to provide for corrosion.

Question 8

Question
An owner-user is responsible for developing, documenting, implementing, executing, and assessing pressure vessel inspection systems and inspection procedures that will meet the requirements of API 510. These systems and procedures will be:
Answer
  • Maintained in an engineering procedure document.
  • Kept as a standard procedure.
  • Contained in a quality assurance inspection manual.
  • In hand and available at owner-user headquarters.

Question 9

Question
Safety precautions are important in pressure vessel inspection because of the limited access to and the confined spaces of pressure vessels. Out of the organizations listed, which is the primary one that should be reviewed and followed?
Answer
  • ASME
  • OSHA
  • NFPA
  • NBIC

Question 10

Question
______________________ may occur if equipment is subjected to temperatures above those for which it is designed.
Answer
  • Creep
  • Brittle fracture
  • Stress Corrosion
  • Erosion

Question 11

Question
lf a probable corrosion rate cannot be determined from reviewing data from the same or similar service vessels or estimated form published data, on-stream determinations shall be made after approximately _____________ hours of service by using NDE methods and a corrosion rate is established.
Answer
  • 500
  • 1000
  • 5000
  • 10000

Question 12

Question
The maximum allowable working pressure for the continued use of a pressure vessel shall be based on computations determined by using the:
Answer
  • Latest edition of the National Boiler Inspection Code or the construction code lo which the vessel was built.
  • Latest edition of the ASME Code or the construction code to which the vessel was built.
  • Latest edition of the API/ASME Code or the construction code to which the vessel was built.
  • Latest edition of the Underwriters Laboratories Code or the construction code lo which the vessel was built.

Question 13

Question
Out of the many methods of inspection ____________________ is considered the most important and the most universally accepted method of inspection.
Answer
  • Radiographic examination
  • Careful visual inspection
  • Ultrasonic thickness measurement
  • Hammer testing

Question 14

Question
If external or internal coverings, such as insulation, refractory protective linings, and corrosion resistant linings are in good condition and there is no reason to suspect that an unsafe condition is behind them,:
Answer
  • it is not necessary to remove them for inspection
  • it is necessary to remove them completely for inspection
  • it is necessary to partially remove them for inspection
  • it is required to remove them completely for inspection on some set interval

Question 15

Question
What API standard provides more information on the inspection of piping, valves and fittings associated with pressure vessels?
Answer
  • API Recommended Practice 576
  • API Recommended Practice 575
  • API Recommended Practice 574
  • API Recommended Practice 573

Question 16

Question
For a corroded area of considerable size in which the circumferential stresses govern, the least thickness along the most critical element of the area may be averaged over a length not exceeding the following: 16a. For vessels with inside diameters less than or equal to 60 inches— 16b. For vessels with inside diameters greater than 60 inches--
Answer
  • 1/4 the vessel diameter or 5 inches, whichever is less.
  • 1/2 the vessel diameter or 10 inches, whichever is less
  • 1/4 the vessel diameter or 15 inches, whichever is less
  • 1/2 the vessel diameter or 20 inches, whichever is less
  • 1/3 the vessel diameter or 40 inches, whichever is less
  • 1/4 the vessel diameter or 30 inches, whichever is less.
  • 1/3 the vessel diameter or 50 inches, whichever is less.
  • 1/4 the vessel diameter or 25 inches, whichever is less.

Question 17

Question
For corrosion calculations the surface of the weld is considered to be:
Answer
  • 1 inch on either side of the weld or twice the minimum thickness on either side of the weld, whichever is greater
  • 2 inches on either side of the weld or 2 times the minimum thickness on either side of the weld, whichever is greater
  • 4 inches on either side of the weld or 4 times the minimum thickness on either side of the weld, whichever is greater
  • 6 inches on either side of the weld or 6 times the minimum thickness on either side of the weld, whichever is greater

Question 18

Question
Under what conditions is an internal field inspection of a newly installed pressure vessel waived?
Answer
  • The contractor installing the vessel assures the owner-user that the vessel is satisfactory for its intended service.
  • A manufacturer’s data report assuring the vessel is satisfactory for its intended service is available.
  • The owner-user assures the inspector that the vessel is satisfactory for its intended service.
  • The manufacturer orally assures the owner-user that the vessel is satisfactory for its intended service

Question 19

Question
An above ground pressure vessel shall be given a visual external inspection, preferably while in operation, at least every _________ years or at the same interval as the internal, whichever is less
Answer
  • 2
  • 3
  • 5
  • 10

Question 20

Question
The period between internal or on-stream inspections for a remaining life of four years or greater shall not exceed one-half the estimated remaining life of the vessel based on corrosion rate or __________ years whichever is less.
Answer
  • 10
  • 15
  • 5
  • 12

Question 21

Question
In cases where the remaining safe operating life is estimated to be less than 4 years, the inspection interval may be the full remaining safe operating life up to a maximum of ____ years.
Answer
  • 1
  • 2
  • 3
  • 4

Question 22

Question
If both the ownership and the location of a vessel are changed, what must happen before it is reused?
Answer
  • It must be internally and externally inspected
  • AII lhe records must be reviewed.
  • It must be thoroughly ultrasonically checked.
  • It must have all the paper work transferred to the new owner.

Question 23

Question
A pressure vessel has been in service for 12 years and has shown a history of corrosion over its service life. The original thickness was 1.9375" thick and the present thickness is 1.405". What is the corrosion rate for this vessel?
Answer
  • 0.266250 inches/year
  • 0.532500 inches/ year
  • 0.088750 inches/year
  • 0.044375 inches/year

Question 24

Question
When must a pressure test be performed on a pressure vessel?
Answer
  • When the contractor working on the vessel deems it is necessary.
  • When the API authorized pressure vessel inspector believes that it is necessary.
  • When the safety group of the owner-user requests it.
  • When the NFPA requests it.

Question 25

Question
Who is authorized to test and repair a pressure relief valve?
Answer
  • An organization experienced in PRV maintenance.
  • A valve repair shop.
  • A certified pressure vessel inspector.
  • A contractor' with valve mechanics.

Question 26

Question
What is the maximum inspection or testing interval of a pressure-relieving device?
Answer
  • 15 years.
  • 12 years.
  • 10 years.
  • 20 years.

Question 27

Question
What determines the inspection interval of pressure-relieving devices?
Answer
  • The interval is determined by the authorized pressure vessel inspector.
  • The interval is determined by the owner-user.
  • The interval is determined by the performance of the device.
  • The interval is determined by the size of the device.

Question 28

Question
The following is not normally found in pressure vessel records.
Answer
  • Manufacturers data reports.
  • Vessel identification numbers
  • Piping past the first vessel flange.
  • Relief valve information.

Question 29

Question
When repairs or alterations are to be performed on a pressure vessel, all materials, and all welding procedures that are to be used must be approved by:
Answer
  • the insurance carrier for the company that the pressure vessel belongs to and the owner-user of the pressure vessel.
  • the owner-user and the contractor performing the repairs or alterations lo the pressure vessel.
  • the API authorized pressure vessel inspector and, if necessary, by an engineer experienced in pressure vessel design, fabrication, or inspection.
  • the original vessel fabricator and the insurance carrier for the company that owns the pressure vessel.

Question 30

Question
What type of repairs can an authorized inspector give prior general authorization for?
Answer
  • Major repairs that require pressure tests.
  • Alterations that require pressure tests.
  • Major alterations that require pressure tests.
  • Limited or routine repairs that will not require pressure tests.

Question 31

Question
When does an inspector normally approve all specified repair and alteration work?
Answer
  • Work is approved after the work contractor certifies the work to be satisfactory and the contractor has pressure tested the vessel.
  • Work is approved by a process/chemical engineer for the owner-user and the contractor has pressure tested the vessel.
  • Work is approved after an inspection by the authorized inspector has proven the work lo be satisfactory and any required pressure test has been witnessed by the him.
  • Work is approved after an inspection and test by the contractor and the unit operators accept the vessel.

Question 32

Question
Who should be consulted before repairing a crack at a discontinuity, where stress concentrations may be serious?
Answer
  • The operators of the vessel.
  • The owner-user.
  • An engineer experienced in the operation of the vessel.
  • An engineer experienced in pressure vessel design

Question 33

Question
All repair and alteration welding shall be in accordance with the applicable requirements of the:
Answer
  • NBIC Code
  • AWS D1.1 Welding Code
  • ASME Code Section VIII.
  • NFPA Welding Code

Question 34

Question
The repair organization shall use qualified welders and welding procedures qualified in accordance with the applicable requirements of:
Answer
  • Section V of the ASME Code
  • Section IX of the ASME Code
  • AWS 01.1 Welding Code
  • API Standard 1104, Welding.

Question 35

Question
The repair organization shall maintain records of its qualified welding procedures and its welding performance qualifications. These records shall be available to the prior to the start of welding.
Answer
  • operator
  • owner·-user·
  • welder
  • inspector

Question 36

Question
For alterations or repairs of vessels initially post weld heat treated as a code requirement and constructed of P-1 and P-3 steels listed in the ASME Code, preheating to not less than ______ degrees F may be considered as an alternative to PWHT when impact testing is not required.
Answer
  • 200
  • 300
  • 400
  • 500

Question 37

Question
A carbon steel (A-285 GR C) vessel must be repaired by welding in a flush patch (replacing a corroded area). Impact testing is not required the vessel is in caustic service and was originally post weld heat treated. Which of the following is correct?
Answer
  • The repair may be post weld heat treated.
  • The repair may be pre-heated to 300 degrees F. while welding and PWHT waived.
  • The repair may be preheated to 200 degrees F. while welding and PWHT waived.
  • None of above.

Question 38

Question
If local post welds heat treatment is approved for a vessel repair (a completed 360 degree band around the vessel is not used - only a localized spot), what are the minimum number of thermocouples required around the localized area to monitor the temperature?
Answer
  • 1
  • 2
  • 4
  • 6

Question 39

Question
When repairing vessels with stainless steel weld overlay and cladding (vessels constructed of P-3, P-4, or P-5 base materials) the base metal in the area of repair should be examined for cracking by UT per ASME Section V. This UT inspection should be made ___________ hours after repairs have been completed for equipment in hydrogen service, especially for chromium-molybdenum alloys that could be affected by delayed cracking.
Answer
  • 12
  • 24
  • 36
  • 42

Question 40

Question
When are fillet welded patches (lap patches) allowed.
Answer
  • They may be only used in vessels with shells 3/8" thick or less.
  • They may be used only if approved by the operators.
  • They may be used only on low pressure vessels.
  • They are used for only temporary repairs.

Question 41

Question
Carbon 01' alloy steel with a carbon content over ______ percent shall not be welded.
Answer
  • 0.30
  • 0.35
  • 0.40
  • 0.45

Question 42

Question
Acceptance criteria for a welded repair 01' alteration should include NDE techniques that are in accordance with the:
Answer
  • Applicable section of the NBIC.
  • Applicable section of the ASME Code
  • Jurisdiction.
  • owner-user.

Question 43

Question
A pressure test is normally required after:
Answer
  • an alteration.
  • a repair.
  • a lightning strike.
  • a unit upset.

Question 44

Question
When is a rerating of a pressure vessel considered complete?
Answer
  • 1. When the pressure vessel engineer approves the rerating.
  • 2. When the authorized construction organization attaches the nameplate to the rerated vessel.
  • 3. When the API authorized PV inspector oversees the attachment of an API 510 nameplate or stamping.
  • 4. When the owner-user accepts the rerating from the rerating organization

Question 45

Question
An API certified inspector who has not been actively engaged, as such, within the previous three years can be recertified by:
Answer
  • 1. being employed by a refinery.
  • 2. being licensed by the jurisdiction.
  • 3. an oral examination.
  • 4. a written examination.

Question 46

Question
76. The Pressure Vessel engineer must additionally consider which of the following when welding a P No. 5 base material to stainless cladding which is in hydrogen service al elevated temperatures?
Answer
  • 1. Weld rod diameter
  • 2. Effects of temper embrittlement
  • 3. Outgassing base metal
  • 4. Weld bead size

Question 47

Question
77. A 12 in. nozzle is being installed in a vessel where the largest existing opening is 10 in. This is considered:
Answer
  • 1. A repair
  • 2. An alteration
  • 3. A rerating
  • 4. A maintenance activity

Question 48

Question
78. How many years of experience are required when the candidate does not have an education level equivalent to a high school education?
Answer
  • 1. 5
  • 2. 3
  • 3. 2
  • 4. 10

Question 49

Question
79. May the API 510 Inspector be assisted by non-certified individuals when visual inspections are performed?
Answer
  • 1. Yes, when authorized by API
  • 2. Yes
  • 3. No
  • 4. Yes, when properly trained and qualified

Question 50

Question
80. When can preheat at 3000 F in lieu of PWHT not be applied in the repairs of a pressure vessel?
Answer
  • 1. For P-No. 1 materials
  • 2. For P-No. 3 materials
  • 3. For P·No. 4 materials
  • 4. None of the above

Question 51

Question
81. Which of the following conditions must be met to qualify vessels for on-stream inspections when the general corrosion rate is less than 0.005 in. per year and has a remaining life greater than 10 years?
Answer
  • 1. The vessel is strip lined
  • 2. The corrosive character of the contents has been established for at least 5 years
  • 3. Not more than two questionable conditions were disclosed at the previous external inspection
  • 4. The operating temperature exceeds the lower temperature limits for the materials creep rupture range

Question 52

Question
82. The definition of "t required" is:
Answer
  • 1. Minimum nominal thickness in inches for a given location or component
  • 2. Minimum actual thickness in inches for a given location 01' component
  • 3. Minimum thickness in inches for a given location or component
  • 4. Minimum allowable thickness in inches for a given location or component

Question 53

Question
83. Which of the following widely scattered pitting cannot be ignored?
Answer
  • 1. The total area of the pits does not exceed 7 square inches within an 9 inch diameter circle
  • 2. No pit depth is greater than 1/3 the vessel thickness
  • 3. The sum of the pit dimensions along any straight line within the circle does not exceed 2.5 inches
  • 4. The total area of the pits does not exceed 7 square inches within an 8 inch diameter circle

Question 54

Question
84. Which of the following is not an alteration:
Answer
  • 1. Increasing the diameter of a shell section
  • 2. Decreasing the temperature with impact testing of materials required
  • 3. Adding a NPS 12 nozzle in a vessel that has two NPS 10 nozzles
  • 4. Adding a NPS 10 nozzle in a vessel that has two NPS 12 nozzles

Question 55

Question
85. A pressure vessel whose thickness does not exceed 2 inches has a MDMT of - 20° F. Per API 510 what is the minimum test temperature permitted?
Answer
  • 1. 30° F
  • 2. - 10° F
  • 3. - 30° F
  • 4. 10° F

Question 56

Question
86. If a filler metal is used that has a minimum specified tensile strength that is lower than that of the base metal, which of the following conditions must be met?
Answer
  • 1. The increased thickness may have rounded corners
  • 2. The repair thickness shall not be more the 60% of the required base metal thickness, excluding corrosion allowance
  • 3. The repair shall be made with a minimum of two passes
  • 4. The chemistry of the filler metal shall be taken at the completion of welding

Question 57

Question
87. How are safety relief devices isolated from the vessel during hydrostatic testing?
Answer
  • 1. Test levers are wired down
  • 2. Removed or gagged
  • 3. Springs are tightened
  • 4. None of the above

Question 58

Question
107. Which of the following is a requirement when installing a patch?
Answer
  • 1. Always perform pressure test after repair
  • 2. Having rounded corners
  • 3. Ultrasonically examine adjacent base material before welding
  • 4. Having rounded corners with a minimum 1 in. radius

Question 59

Question
108. Who decides how long a temporary patch may remain in place?
Answer
  • 1. Owner-user
  • 2. Pressure vessel engineer & API Inspector
  • 3. Pressure vessel engineer
  • 4. API Inspector

Question 60

Question
109. You have a corroded area which is 0.900 in. thick. The minimum thickness is calculated to be 1.000 in. the corrosion rate is 0.01 in. per year. Assuming a constant corrosion rate how much weld overlay must be applied to have a 10 year life?
Answer
  • 1. 0.10 in.
  • 2. 0.20 in.
  • 3. 1.300 in.
  • 4. repair not permitted by API 510

Question 61

Question
110. Who is notified when a repair to an ASME Section VIII, Division 2 vessel is required?
Answer
  • 1. Pressure vessel engineer
  • 2. API Inspector
  • 3. Pressure vessel engineer & API Inspector
  • 4. Manufacturer of vessel

Question 62

Question
111. Who is responsible to keep records of pressure vessel inspections & repairs?
Answer
  • 1. Owner -user
  • 2. API Inspector
  • 3. Pressure vessel engineer
  • 4. Engineering manager

Question 63

Question
114. Which of the following is defined as a repair organization?
Answer
  • 1. An owner-user who repairs his or her own equipment
  • 2. The holder of an ASME "S" stamp
  • 3. A contractor whose qualifications are acceptable to the pressure vessel engineer
  • 4. An individual or organization that is authorized by API

Question 64

Question
112. Which NDE method is used to examine P-3, P-4, or P-5 base metal when repairs to stainless steel weld overlay is made?
Answer
  • 1. MT
  • 2. UT
  • 3. RT
  • 4. VT

Question 65

Question
113. Quality assurance can be simply defined as:
Answer
  • 1. The work necessary to restore a vessel to a condition suitable for safe operation
  • 2. All planned, systematic, and preventative actions required to determine if materials, equipment or services will meet specified requirements
  • 3. Work done by the OA Manager
  • 4. Planned actions which determine that all NDE is performed correct

Question 66

Question
115. How long must the temper bead repair be he Id at temperature after completion of the weld repair for an API 510 applications?
Answer
  • 1. 5 hours
  • 2. 1 hour
  • 3. 4 hours
  • 4. 2 hours

Question 67

Question
116. Which of the following must be considered by the pressure vessel engineer when repairs are made to stainless steel weld overlay for equipment in hydrogen service?
Answer
  • 1. Hardening of the weld metal due to grinding or arc gouging
  • 2. Softening of base metal due to welding
  • 3. PWHT to reduce impact properties
  • 4. Outgassing base metal

Question 68

Question
121. During an internal inspection of a pressure vessel a blister is found in one of the heads between knuckle and circumferential head to shell weld. What would be the most appropriate action?
Answer
  • 1) Replace the head
  • 2) Consult with a pressure vessel engineer
  • 3) Drill the blister to relieve the pressure
  • 4) Pressure test the vessel

Question 69

Question
122. A pressure vessel contains the following nozzles, (2-NPS 6, 1-NPS 10 and 4-NPS 3). Which of the following would be an alteration?
Answer
  • 1) Addition of an NPS 6 nozzle
  • 2) Addition of an NPS 12 nozzle
  • 3) Addition of an NPS 3/4 nozzle
  • 4) Addition of three NPS 1 nozzles

Question 70

Question
125. When an owner/user chooses to conduct a RBI assessni8nt it must include a systematic evaluation of:
Answer
  • 1. Fatigue
  • 2. Likelihood of failure
  • 3. Associated consequence of failure
  • 4. Both 2 & 3

Question 71

Question
126. Examples of degradation mechanisms are:
Answer
  • 1. Corrosion
  • 2. Cracking
  • 3. Creep
  • 4. All the above

Question 72

Question
127. It is essential that all RBI assessments be:
Answer
  • 1. Reviewed by jurisdictional authorities
  • 2. Understood by Engineering
  • 3. Thoroughly documented
  • 4. Defined in terms of API RP4467

Question 73

Question
128. An RBI assessment may be used to ______ the 10 year inspection limit.
Answer
  • 1. Increase or decrease
  • 2. Increase
  • 3. Decrease
  • 4. Limit

Question 74

Question
130. What is the maximum interpass temperature for a repair weld using the controlled deposition method that was originally PWHT’d?
Answer
  • 1. 400°F
  • 2. 600°F
  • 3. 300°F
  • 4. Not greater than that used in procedure qualification test.
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