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In the liquid penetrant process penetration time is critical. The minimum time shall be as required in.

A. The ASNT only

B. Table T-672 of Article 6 of Section V

C. Table T-572 of Article 5 of Section V

D. The API 510 Code

The Inspection Department’s preparation for a vessel inspection cycle should include.

A. Time coordination for contractors

B. Information about the contractors who will do any welding

C. The retirement thickness of vessels to be inspected to provide for a plan of action if a problem is discovered, there may be little time for consulting with others

D. Identifying who last inspected the vessel

Cracks in vessels are most likely to occur in vessels in what locations?

A. At sharp changes in shape, size or near weld seams

B. At weld seams

C. At attachment welds for internals

D. Where previous repairs have been performed

Define re-rating according to the API 510 Code.

A. A change in either the temperature ratings or the maximum allowable working pressure rating or change in both

B. Replacement of a part with one rated at a higher pressure than the original part

C. Replacement of a part with and identical component

D. A change in the operating flow rate in a vessel to one higher than that of the original design

What does the following describe? When the temperature of a vapor is reduced to the point where some or the entire vapor becomes liquid by the transfer of heat to another fluid.

A. Condensers

B. Air Cooler

C. Cooler

D. Re-boiler

Hydrogen blisters can form at many different depths from the surface of the steel, in the middle of the plate or near a weld. In some cases, neighboring or adjacent blisters that are at slightly different depths (planes) may develop cracks that link them together. This describe__________.

A. Hydrogen blistering

B. Sulfide Stress Corrosion Cracking (SSC)

C. Hydrogen Induced Cracking (HIC)

D. Stress Oriented Hydrogen Induced Cracking (SOHIC)

What metals might be subject to brittle fracture even at room temperature?

A. Carbon Steel

B. Low Alloy Steel

C. Some Ferritic Steels

D. Carbon, Low Alloy, and Ferritic Steels

A hole type IQI is designated as a number 15 and its thickness is 0.015 inch, what would be the diameter of the 2T hole in this penetrometer?

A. 0.015 inch

B. 0.150 inch

C. 0.030 inch

D. 0.300 inch

You notice that a pressure relief device has a closed bonnet. What type of valve is it?

A. Relief Valve

B. Safety Relief Valve

C. Conventional Safety Relief Valve

D. Relief Valve and Conventional Safety Relief Valve

10.

A permissible way to allow for corrosion in a vessel is to.

A. Place epoxy liners in the corroded area

B. Increase safety device settings

C. Re-rate below original design conditions

D. Lower temperature and increase pressure on parts of the vessel not in question

11.

While reviewing maintenance records you notice that the pre-bulged rupture disks with pressure on the concave side have been in service for three years. Is this O.K. why or why not?

A. No, the recommended maximum service life for these burst disks is 2 years

B. Yes, the recommended maximum service life for these burst disks is 3 years

C. No, the recommended maximum service life for these burst disks is 1 year

D. Yes, as long as no sign of failure has been revealed by inspection

12.

In hydro processing units concentration of above 2% increases the potential for blistering, HIC and SOHIC.

A. decreasing – ammonium bisulfide

B. increasing – aluminum silicate

C. decreasing – ammonium peroxide

D. increasing – ammonium bisulfide

13.

Process conditions should be monitored to ensure that a proper pressurization sequence is followed to help prevent___________due to temper embrittlement.

A. temper cracking

B. ductile fracture

C. polythionic cracking

D. brittle fracture

14.

If a crack is discovered in a base metal, it should be completely removed and then the excavation examined using an appropriate NDE technique before a welded repair is attempted. A concern that must be addressed in this repair process is that.

A. This type of repair is difficult to make in the overhead welding position

B. The crack length must not exceed 6 times the base metal thickness

C. Any effort to remove the crack using arc gouging may cause the crack to grow

D. The crack tips must be drilling hole stopped prior to welding

15.

Excess thickness in vessel walls is common this is normally not as a result of.

A. Corrosion allowance

B. Using nominal plate sizes rather than the exact calculated thickness required

C. A reduction of safety valve settings or change in service

D. Scale accumulations

16.

What is the most important method of vessel inspection?

A. Radiographic profile surveys

B. Ultrasonic onstream inspections

C. Thermograph surveys

D. Careful visual survey and inspections

17.

What principle of cooling is used with exposed tube bundles under a cooling tower?

A. Conductive

B. Radiant

C. Evaporative

D. Isometric

18.

Which of the following relief devices is intended to work with steam boilers?

A. Relief Valve

B. Safety Relief Valve

C. Safety Valve

D. Balanced Safety Relief

19.

Which of the following are types of Air-Cooled Exchangers?

A. Induced Draft and Natural Convection

B. Natural Flow and Forced Draft

C. Forced Draft and Induced Draft

D. Overhead Spray and Inverted Spray assist units

20.

Prior to 1930, what specification was unfired pressure vessels built to in refineries?

A. API/ASME Code for Unfired Pressure Vessels for Petroleum Liquids and Gases

B. Specifications of the user or manufacturer

C. Jurisdictional requirements if any existed

D. There were no standards or specifications prior to 1930

21.

Faulty materials can lead to what primary problems?

A. Cracking, leakage, blockage, and excessive corrosion

B. Process upsets

C. Production quotas not being met

D. Multiple repairs

22.

A pilot operated safety valve has been installed in heavy crude service is this O.K?

A. Yes, these valves are very effective in this type of service

B. No, these valves are not intended to operate at normal temperatures

C. Yes, these valves have closed bonnets and are leak proof

D. Possibly not, valves may not operate properly due to deposits clogging pilot circuits

23.

Before an inspection starts in a vessel, who else besides the safety man should be informed?

A. Coworkers who will assist in the inspection

B. Operations

C. Repair concerns

D. All people working in the area of the vessel

24.

If a vessel has had previous internal inspections, what should the inspector do prior to his inspection?

A. Alert operations

B. Review API 572 for methods of failure that pertain to the vessel to be inspected

C. Review previous inspection records

D. Call the vessel manufacturer and obtain all records held on file

25.

How may carburized austenitic stainless steel sometimes be detected?

A. By chemical testing in situ

B. By the use of a magnet

C. X-ray fluorescence

D. Trepanning

26.

An arc welding power source with a volt-ampere relationship yielding a large welding current change from a small voltage change is known as a .

A. constant current power supply

B. current inverting power supply

C. constant voltage power supply

D. linear voltage power supply

27.

Increasing hardness of the metal substrate is not always a good indicator of improved resistance to , particularly where corrosion plays a significant role.

A. stress corrosion

B. stress corrosion cracking

C. erosion

D. ductile failure

28.

An inspector should be familiar with the current ASME Codes and previous editions of the Code, what other publications should he be knowledgeable of?

A. The API Industry Informer Magazine, for the latest industry alerts

B. Local, state and federal regulations and other specifications for the construction of pressure vessels

C. ASNT rules for materials

D. There are no other publications to be concerned with

29.

Who should make the decision to trepan metal from a vessel for metallurgical evaluation?

A. The API inspector

B. The API Authorized Inspector

C. The NBIC Authorized Inspector

D. Someone who knows how to analyze the problems related to repairing the sample holes

30.

Normally when relief valves are removed from a system the inlet and outlet piping is inspected, if block valves are closed and the unit is in service what can be done to inspect this piping?

A. Use of special borescope, which utilizes a pressure chamber

B. Radiographs can be performed to indicate major fouling or blockage

C. Do in a hot tap in the vicinity of the suspected blockage

D. Probing using a high pressure sealed probing device

31.

When leakage is encountered for the first time in a given service of an exchanger is it desirable to.

A. Call the manufacturer for probable locations

B. Determine the nature of deterioration

C. Reassess the need for the exchanger in the process stream

D. Hydrostat the exchanger as soon as possible

32.

A welder has performed a qualification test on a NPS 10 diameter pipe, the welding groove was horizontal and the pipe was vertical, this describes the position.

A. 4G

B. 6G

C. 5G

D. 2G

33.

When testing a vessel pneumatically what should be on hand to aid in the visual examination?

A. A helper

B. Insulators to remove the insulation

C. Soap solution or ultrasonic sound detector

D. Acoustic emission equipment

34.

The following describes what type of construction for a pressure vessel? The cylindrical section is made up of a number of thin concentric cylinders fabricated together, one over the other, until the desired thickness is obtained.

A. Borland reactor wall method

B. Compressed ring method

C. Multilayer method

D. Multi-ring compressed wall

35.

If carbon steel vessels cannot resist a corrosive fluid, what method of construction is not normally used for such a vessel?

A. Plain carbon steel

B. Lined vessel using an alloy liner

C. Lined vessel using a refractory liner

D. Lined vessel using a glass liner

36.

What is the most important factor(s) in determining the inspection frequency of a pressure vessel?

A. Date placed in service

B. Rate of deterioration and remaining corrosion allowance

C. Remaining corrosion allowance

D. Rate of deterioration

37.

The difference between GMAW and the GTAW welding process is.

A. One uses alternating current and dc voltage, the other does not

B. Both use a consumable electrode made of tungsten and the other does not

C. One uses a shielding gas and the other can not

D. One is usually considered manual and the other semi-automatic

38.

A discontinuity resulting from an arc, consisting of any localized re-melted metal, heat-affected metal, or change in the surface profile of any metal object is a description of .

A. slag inclusion

B. arc blow

C. tungsten deposit

D. an arc strike

39.

List three places where category B welds are located in an ASME Code Section VIII Div. 1 vessel.

A. Longitudinal joint in shells, in nozzles and communicating chambers

B. Circumferential joints in transitions in diameter, connecting heads to communicating chambers and hemispherical heads to shells

C. Circumferential joints in transitions in diameter, connecting heads to communicating chambers and ellipsoidal heads to shells

D. Circumferential joints in transitions in diameter, connecting heads to communicating chambers and the joints used to make a sphere from two hemispheres

40.

What type material is always required to have a mill test report or a certificate of compliance in accordance with Section VIII Div. 1 of the ASME Code?

A. ASTM pipe

B. ASTM forged pressure parts

C. Gray cast iron parts used for pressure

D. Plate

41.

Where will most of the cracks in a pressure vessel’s steel supports be located?

A. In areas that are not protected from the environment

B. Around ladders

C. Around skirts

D. Welded seams and adjacent areas

42.

According to API 510 when would a repair constitute a rerating?

A. The repair changes the design pressure

B. The repair changes the design temperature

C. The repair changes the design pressure and/or the design temperature

D. A new name plate stating a new design pressure or temperature

43.

Recording on a data sheet of an indication or condition that does not necessarily exceed the rejection criteria but in terms of code, contract or procedure will be documented as a .

A. pre-rejectable indication

B. reportable indication

C. recordable indication

D. post-rejectable indication

44.

As regards corrosion evaluation of a vessel part which contains a butt weld, how far on each side of the weld does the welded joints efficiency E extend when performing minimum thickness required calculations?

A. 1 inch

B. 1 inch or twice the minimum thickness of the weld whichever is less

C. 1 inch or twice the minimum thickness of the shell whichever is greater

D. This is not allowed the entire vessel part must be evaluated using the E of the affected butt joint

45.

How may cracks be made to stand out from the surrounding areas being inspected?

A. Highly burnishing the area

B. Abrasive grit blasting

C. Abrasive grit blasting followed by etching

D. Etching followed by abrasive grit blasting

46.

After a test and inspection cycle in a unit, pressure relief devices should not be checked for.

A. Installation of the correct device

B. No gags or blinds left in place

C. Seals installed to protect spring settings have not been broken

D. Weatherproof caps made of the proper material

47.

Which of the following does not describe how metallic liners can be installed in a pressure vessel?

A. The liner material is explosion bonded to the carbon steel part

B. The liner material is rolled to the carbon steel plate as part of the manufacturing process

C. The liner material is welded to the carbon plate

D. The liner material is attached with a high temperature thermo chemical endothermic process

48.

Jurisdictions can require that welded repairs to a pressure vessel be made by repair companies that possess.

A. A jurisdictional competency certification certificate

B. A quality control program that is in place

C. The “R” stamp from the National Board of Boiler and Pressure Vessel Inspectors

D. A license issued by the jurisdiction

49.

A new weld repair project is just starting, as the inspector you should review the.

A. The repairs concerns quality plan

B. The procedures (WPR) (PWR)

C. The materials chemical test reports, as they become available

D. Welder’s certifications, the welding procedures, and the MTRs

50.

A used vessel has been bought and moved to a new site and installed. What must the inspector do before certification of the vessel for operation?

A. Insure that the complete set of drawings is generated noting areas of special interest

B. An internal inspection

C. Make sure that the vessel is properly supported and do a complete hydrostatic test

D. Witness a pneumatic pressure test

51.

You notice that a new vessel, has had some small flat bars installed inside near an opening, these bars are most likely.

A. Bolmar length bars used to monitor chemical reactions

B. Corrosion tabs for determination of new vessel corrosion rates at that location in the vessel

C. Used for a dissimilar metal test

D. Abandoned tray clips

52.

You inspected a weld and it conforms to the minimum requirement’s of the construction codes, but you rejected it because you learned that.

A. The welding procedure was too old

B. The welder tested in accordance with Section X not Section IX

C. The procedure was qualified to ASME Section IX not API 510

D. The procedure had not been qualified to Section IX

53.

The pulse echo contact method can be applied to any material in which ultrasonic waves will propagate at a
throughout the part, and from which back reflections can be obtained and resolved.

A. varying velocity

B. constant velocity

C. constant velocity with attenuation

D. varying velocity with attenuation

54.

Which of the following items should not be included in a fully documented quality control program for pressure relief devices?

A. Organizational chart, Statement of authority and responsibility, Repair and Inspection program

B. Organizational chart, Statement of authority and responsibility, Welding, non-destructive examination procedures and heat treatment

C. Organizational chart, Statement of authority and responsibility, general example of valve’s repair name plate

D. The maximum set pressure for each rupture disk device

55.

Who should be consulted with if an alteration is planned for a Section VIII Div. 1 vessel?

A. A professional engineer

B. The NBIC inspector

C. The department engineer over production

D. A pressure vessel engineer experienced in pressure vessel design

56.

Wire IQI s must be placed so that.

A. They are placed parallel to the weld metal’s length

B. They are placed perpendicular to the length of the weld metal and across the weld

C. They are at 45o to the weld metal’s length and placed across the weld

D. Wire IQI s is not allowed for weld evaluations

57.

Which of the following accelerates erosion in pressure vessels?

A. High temperature return lines

B. Low temperature return lines

C. Acidic components that are suspended in an aqueous solution

D. Liquid droplets in vapor streams, suspended solid particles in liquid or vapor streams

58.

You notice a workman applying blows to a weld with a pneumatic tool, what is he doing?

A. Conditioning

B. De-fluxing

C. Re-distribution of weld metal

D. Peening

59.

A spot radiograph in accordance with UW-53 has revealed rounded indications that exceed those allowed in Appendix 4 of Section VIII Div. 1. What must be done?

A. Two tracer radiographs must be performed and if they pass the area that failed in the first shot repaired and retested

B. Nothing

C. The entire joint must be radiographed fully

D. Ultrasonic inspection must be performed on the entire welded joint

60.

One time that the manufacturer of a pilot operated pressure relief device should be consulted about their device’s setting procedure is when.

A. The device is very old

B. The device is in a non-corrosive service

C. The device will be set using water

D. The device is in corrosive service

61.

Describe a Type 3 weld in accordance with ASME Section VIII Div. 1.

A. A weld made form one side only with a backing ring, which remains in place

B. A weld made form both sides, and which is restricted in diameter and thickness limits

C. A weld made from both sides

D. A weld made form one side only, which does not have a backing ring

62.

A technician is spraying solvent to clean off the excess penetrant on a weld, this is O.K. if.

A. It is not, this is never acceptable

B. It is spayed in a light mist and in short bursts

C. It is sprayed on a lint free cloth prior to wiping the weld

D. It is sprayed directly on the part

63.

Chilling coils are.

A. Finned coils

B. Pipe coils

C. Copper

D. Very long and normally found in oval shaped vessels

64.

Scored Tension-Loaded rupture disks are normally made from .

A. thinner material than the un-scored disks for the same pressure

B. thicker material than the un-scored disks for the same pressure

C. a different material than un-scored disks for the same pressure

D. the same thickness material as un-scored disks for the same pressure

65.

Inspection of a reboiler used at the bottom of a tower will normally reveal the most corrosion where.

A. The outlet of the hot fluid is located

B. The inlet of the reboiler

C. The mid section of the reboiler

D. Anywhere, no particular place is worse than the other

66.

What services is a relief valve intended for?

A. Steam

B. Gases

C. Incompressible fluids

D. Water only

67.

What Codes may be used to determine a vessel’s MAWP?

A. The latest edition of the ASME Code or the construction Code to which the vessel was built

B. The latest edition of the ASME Code or the edition of the ASME Code used for construction

C. The API 510

D. The alternative rules of Section VIII Div. 2

68.

Nonmetallic linings are often used to reduce the effects of corrosion, any breaks in the lining reduce its effectiveness considerably, these breaks are sometimes referred to as.

A. Vacations

B. Holidays

C. Breeches

D. Caverns

69.

What does the complete record file of a vessel contain?

A. Advance data

B. Shop notes

C. Basic data and field notes

D. All previous owners of the vessel

70.

During the external inspection of an internally insulated vessel, you find a blister is present. The vessel operates at elevated temperatures and is in a service that might cause hydrogen attack. You feel that the blister is from hydrogen, you should.

A. Issue a report with the location identified

B. Look into the records of the vessel for previous failures

C. Check the fabrication details of the vessel to see if hydrogen attack is possible

D. Consult with a metallurgical and or a pressure vessel engineer

71.

These materials exhibit an endurance limit below which fatigue cracking will not occur, regardless of the number of cycles.

A. Carbon Steel and Stainless Steel

B. Aluminum and Selenium

C. Titanium and Zircon

D. Carbon Steel and Titanium

72.

A welding electrode has the following marking E-8018-B2. What is the appropriate F-Number for this electrode?

A. 4

B. 3

C. 6

D. 8

73.

In the U.S.exchangers are manufactured to.

A. ADEMA

B. ASME B31.3

C. API Standards 665 and 661

D. API Standards 660 and 661

74.

Using the contact pulse echo method of ultrasonic thickness examination the basic formula for the instrument uses to calculate thickness is .

A. T = Vt/3

B. T = Vt/2

C. T = ½ Vt/3

D. T = ¼ Vt/2

75.

The range of inclination for the flat (1G) welder’s test position, off of the horizontal axis in degrees is.

A. 15 to 80o

B. 5 to 15o

C. 0 to 15o

D. 80 to 90o

76.

The performance of some trays in a process vessel depends on.

A. The weight of the fluid

B. The temperature of the fluid

C. The viscosity of the fluid

D. The amount of leakage occurring at the tray

77.

A vessel due to corrosion has a remaining thickness that is below the minimum required thickness. If the thinned areas are to be evaluated for continued service using the design by analysis methods of Section VIII Division 2. When this approach is used it is always true that.

A. The NBIC Authorized Inspector must be consulted

B. Operations must agree

C. Consultation with a pressure vessel engineer experienced in pressure vessel design is required

D. The materials used in the fabrication of the vessel and their notch toughness must be known

78.

What must an inspector consider when recommending the filling of pits with an epoxy?

A. Is this permitted by the repair concern

B. Will this epoxy hold up in this service

C. The strength the epoxy will add to base metal being repaired

D. What will be required to clean the pits prior to application of the epoxy

79.

When inspecting internals of a catalytic reactor, the inspection will mostly consist of what?

A. Ultrasonic measurement

B. Profile radiography

C. Line scanning

D. Visual inspection with some picking and scrapping

80.

The following describes what type of relief device?The major relieving device is combined with and controlled by a self-actuated auxiliary pressure RV.

A. Johnson Controls bi-directional valve

B. Pilot operated reverse flow pressure control

C. Pilot operated pressure relief valve

D. Pilot operated check valve

81.

When inspecting nonmetallic linings in vessels it is true that if a liner has bulged it has most likely also.

A. Spalled

B. Cracked

C. Segregated identifiable components

D. Of shingle type construction

82.

Some relief valves are manufactured using resilient O-ring seals. Which of following is a reason for these O-rings?

A. Resistance to chemical attack

B. To resist high temperature

C. To promote a higher degree of tightness in the sealing surfaces

D. To make metal parts slide easier

83.

Simmer in a relief valve is best described as.

A. A noise emitted when the valve opens too slowly

B. A noise emitted when the valve opens too rapidly

C. The audible or visible escape of compressible fluid between the seat and disk of the valve

D. A high pitched noise that varies with pressure changes

84.

What is the first step taken in the repair process when a relief valve enters the repair shop before it is dismantled?

A. Profiling and reference charting

B. Pop pressure test

C. Chemical cleaning and decontamination

D. Visual inspection

85.

A welding electrode has the following marking E-7018. Explain the meaning of the number 1 in 7018.

A. The first lot of 7018 electrodes produced that month at the plant

B. The electrodes are certified to be moisture free

C. The 1 determines the position of welding recommended for this electrode

D. First quality electrode according to the Section IX

86.

Fracture toughness is defined as.

A. Charpy V notch

B. Breaking force

C. The amount of force required to cause a material to deform plastically

D. The ability to resist fracture or crack propagation under stress

87.

Decarburization may be defined as.

A. A loss of iron from the surface of a nonferrous alloy

B. A loss of carbon from the surface of a ferrous alloy

C. A loss of iron from the surface of a ferrous alloy

D. A loss of carbon from the intergranular portion of the ferrous alloy

88.

The most susceptible steels to graphitization are.

A. 300 Series Stainless Steels

B. 400 Series Stainless Steels

C. Copper Nickel alloys

D. carbon and carbon 1/2-molybdenum steels

89.

The spark test is used for.

A. Inspection of leaks in glass, plastic or rubber linings

B. Determining the chemical volatility and corrosive nature of a substance

C. Metallurgical determination of alloys and their chemistry

D. Determining the chemical composition of deposit in a vessel

90.

A repair to restore missing, removed or corroded clad or overlay must be approved by.

A. The pressure vessel engineer

B. The API inspector

C. Both the pressure vessel engineer and the API inspector

D. A professional engineer

91.

Indications observed by the dye penetrant NDE method are often larger than the actual imperfection in the material. What is the accept reject criteria based on?

A. The dimensions of the imperfection revealed by the inspection

B. The dimensions of the developed test

C. The dimensions of the developed test, following a written procedure

D. The dimension size allowed by the prevailing code

92.

When repairing a vessel using welding by the half-bead / temper bead technique when notch toughness is not a requirement, you may use the.

A. Shielded metal arc welding with the 7018 electrodes only

B. Gas metal arc welding with S70 sold core wire only

C. Gas tungsten arc welding with E309 through E316 rod only

D. Shielded metal, Gas metal and/or Gas Tungsten arc welding processes

93.

Vessels in water service are subject to maximum corrosion where.

A. Cooling waters are high in pH

B. Cooling waters are low in pH

C. Water temperatures are highest

D. Water temperatures are lowest

94.

During an inspection of a pressure vessel which has previously been in service, thickness measurement locations should be taken based on.

A. Locations during previous inspection cycles

B. Areas that have thinning

C. Areas which have the most deterioration, or if deterioration is widespread enough readings to assure an accurate determination of the remaining thickness

D. Areas that have a known problem only

95.

The term ‘Full Radiography’ in Section VIII Div. 1 means that a vessel must have.

A. 100 % of its welds radiographed

B. All of the welds required by Code to be fully radiographed examined

C. 100 % of the all of the welds which exceed NPS 10 and or 1-1/8″ radiographed

D. Radiography applied to all types of weld including fillet welds

96.

The hydrostatic head must be considered when rating a liquid filled vessels.

A. Bottom shell course’s material of construction

B. Top formed head’s geometry

C. Reinforcement pad material selection

D. Each component MAWP

97.

Spherical vessels are usually supported by.

A. Steel columns attached to the shell, or by skirts

B. Concrete slabs

C. Completely supported by resting on the ground

D. Earthen embankments

98.

A vessel is undergoing a hydrostatic test per the rules of the ASME, the pressure it shall be visually inspected at is.

A. The test pressure divided by 1.3

B. No less than the test pressure divided by 1.3

C. No less than the test pressure divided by 1.1

D. No less than 4/5 the test pressure

99.

If deciding on a technique(s) to use to inspect a vessel you must consider.

A. The condition of the vessel and when the last inspection was

B. The condition of the vessel during the last inspection

C. The condition of the vessel and the environment under which it operates

D. The latest operational data such as logs

100.

If repairs, re-ratings, or alterations are planned to any air-cooled heat exchanger the following standard(s) in addition to API 510 should be used.

A. ASME Section VIII Div. 1

B. API Standard 661

C. TEMA (Tubular Exchangers Manufacturers Association)

D. API 579

101.

The period between internal inspections or on-stream inspections shall not exceed.

A. The quarter corrosion rate life

B. One – half the corrosion rate life

C. The estimated remaining life of the vessel or based on the corrosion rate or 10 years which ever is less

D. One – half the estimated remaining life of the vessel or based on the corrosion rate or 10 years which ever is less

102.

If corrosion has occurred behind a nonmetallic liner, it possible that there will be a.

A. Large external bulge in the vessel’s outer skin

B. Small external bulge in the vessel’s outer skin

C. Disbonding of the liner from the base metal of the vessel part

D. A very large corrosion build up on the external surface of the liner

103.

For clad vessels constructed with P-3, P-4 or P-5 base materials, the base material in the area of a welded repair should be examined for cracks using.

A. Visual inspection

B. Magnetic particle inspection

C. Ultrasonic examination

D. Dye penetrant examination

104.

If heads are formed so that the pressure is on the concave side, they are considered by the ASME to be.

A. Minus heads

B. Seamless

C. Plus heads

D. Spun heads

105.

Prior to a repair on a pressure vessel to its code of construction, what if any additional requirements for inspection must be met?

A. Jurisdictional requirements, if any, that exceeds those of the code of construction

B. The documentation of the repair materials should include mill test reports for all material forms

C. The qualifications of the repair concern performing the work must be examined in detail

D. The need for qualified welding procedures

106.

A forged flat head attached to a vessel by butt welding must follow all the rules for.

A. Circumferential welds given in Part UW of Section VIII

B. Longitudinal welds given in Part UW of Section VIII

C. Circumferential welds given in Part UCS of Section VIII

D. Longitudinal welds given in Part UCS of Section VIII

107.

Dezincification can occur in copper-zinc alloys (brasses) containing less than when used in water service.

A. 50% zinc

B. 50% copper

C. 85% zinc

D. 85% copper

108.

Why is it important to check a relief valve for seat tightness?

A. Leakage can be a hazard to the environment and leakage leads to fouled inoperable valves

B. Leakage leads to fouled and gate valves

C. Leakage leads to fouled rupture disks on the inlet

D. Leakage leads to fouled rupture disks on the outlet

109.

If a vessel has a history of minor corrosion. How shall thickness measurement locations be chosen?

A. The shell courses and heads must have one measurement taken at the north, south, east and west compass points

B. One thickness measurement on each head and shell course when the vessel is small, however more measurements are advisable when the vessels are large

C. Each shell course and head shall have one measurement taken at 0, 90, 180, and 270 degrees

D. Large vessels shall have it shall 12 per shell course and 8 taken per head and nozzle

110.

The weld gauge in the picture above is known as .

A. a bridge cam gauge

B. a hi-lo gauge

C. an adjustable fillet weld gauge

D. a skew T-fillet weld gauge

111.

A balanced safety relief valve uses a bellows or other means to.

A. Seal the valve internals

B. Allow for part expansion during temperature increases

C. Create backpressure at desired components in the valve

D. Minimize the effects of backpressure on the operating characteristics of the valve

112.

The spherical radius R to be used for the calculation of a standard tori spherical head’s corrosion in it central dished portion is.

A. The diameter of the shell

B. 80 % of the shell’s diameter

C. The equivalent radius of the shell

D. 80% of the heads diameter

113.

According to API 576, rupture disks that are removed for inspection should really be.

A. Cleaned by an approved solvent for the service it is in

B. Cleaned by light wire brushing and in no case scraped

C. Cleaned by light scraping and then wire bushed lightly

D. Replaced, due to the likelihood they may fail prematurely after handling

114.

A welded repair to a vessel is planned, which of the following statements does not apply to this situation?

A. The welding procedures must be qualified

B. The welders performing the work must pass a performance qualification test to Section IX

C. Consultation with a pressure vessel engineer may be required

D. The parts to be welded cannot be below 35 o F

115.

For welds the thickness on which a penetrameter is based is.

A. Nominal single wall thickness of the base metal

B. Nominal single wall thickness of the base metal plus the actual thickness of the weld reinforcement

C. Nominal single wall thickness of the base metal plus the estimated thickness of the weld reinforcement, not to exceed the maximum allowed by the referencing Code

D. 20 % of the single wall thickness plus weld reinforcement

Question 1 of 115

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Latest API 510 Exam Pattern, Eligibility, Code Books, and Recertification

If you are preparing for the API 510 Pressure Vessel Inspector exam, it is important to understand the latest exam format, required study publications, qualification rules, and recertification requirements. This page gives you a simple overview so you can prepare with confidence. The API 510 certification is valid for three years.

Latest API 510 Exam Structure

The API 510 exam day is 7.5 hours long. It includes a short tutorial, 2.75 hours for the closed-book portion, a 45-minute lunch break, and 3.75 hours for the open-book portion. The exam contains 170 total questions, but only 140 questions are scored. The remaining questions are pretest questions. There are 110 closed-book questions and 60 open-book questions. API also recommends reviewing the exam tutorial before test day to understand the exam format.

Important API 510 Exam Day Note

The API 510 exam is currently offered in person at designated test centers only. During the exam, you cannot bring paper notes, books, or printed codes into the test center. For the open-book portion, the allowed reference codes and standards are provided in PDF format on the exam computer.

Recommended API 510 Study Code Books

For the September 2025, January 2026, and May 2026 API 510 exam windows, API lists the following publications and editions on the official effectivity sheet.

Main API and ASME References

API 510 – Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, 11th Edition, October 2022, Errata 1 (March 2023)
API RP 571 – Damage Mechanisms Affecting Fixed Equipment in the Refining Industry, 3rd Edition, March 2020. (Take A Free API 571 Exam Practice Test – Quiz Course)
API RP 572 – Inspection Practices for Pressure Vessels, 5th Edition, November 2023. (Take A Free API 572 Exam Practice Test – Quiz Course)
API RP 576 – Inspection of Pressure-relieving Devices, 5th Edition, September 2024. (Take A Free API 576 Exam Practice Test – Quiz Course)
API RP 577 – Welding Processes, Inspection, and Metallurgy, 3rd Edition, October 2020. (Take A Free API 577 Exam Practice Test – Quiz Course)
API RP 578 – Material Verification Program for New and Existing Assets, 4th Edition, February 2023 (Take A Free API 578 Exam Practice Test -Quiz Course)
ASME Boiler and Pressure Vessel Code, 2023 Edition: Section V, Section VIII Division 1, and Section IX (welding only) within the listed exam scope
ASME PCC-2, 2022 Edition – Repair of Pressure Equipment and Piping, including the specific listed articles and appendices. (Take A Free ASME PCC-2 Exam Practice Test – Quiz Course)

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API RP 571 Sections Included on the Exam

Only selected parts of API RP 571 are included on the API 510 exam. These include Section 2 Terms and Definitions and specific damage mechanisms such as amine stress corrosion cracking, atmospheric corrosion, boiler water and steam condensate corrosion, brittle fracture, caustic corrosion, chloride stress corrosion cracking, corrosion under insulation, erosion-corrosion, high-temperature hydrogen damage, hydrochloric acid corrosion, naphthenic acid corrosion, sulfidation, and wet H2S damage.

ASME PCC-2 Articles Included on the Exam

The API 510 exam also includes selected ASME PCC-2 articles such as Article 101, 201, 202, 209, 210, 211, 212, 215, 216, 304, 305, 312, 501, and 502, along with their appendices.

Are You Qualified to Take the API 510 Exam?

API states that eligibility for the API 510 exam depends on your education plus relevant pressure vessel experience, and that experience must have been gained within the last 10 years while working for, or under contract with, an authorized inspection agency as defined in API 510.

API 510 Qualification Requirements

Education	Years of Industry Experience	Experience Required
BS or higher in engineering or technology, or 3+ years of military service in a technical role	1 year	Supervision or performance of inspection activities as described in API 510
2-year associate degree or certificate in engineering or technology, or 2 years of military service in a technical role	2 years	Design, fabrication, repair, operation, or inspection of pressure vessels, including at least 1 year in supervision or performance of inspection activities as described in API 510
High school diploma or equivalent	3 years	Design, fabrication, repair, operation, or inspection of pressure vessels, including at least 1 year in supervision or performance of inspection activities as described in API 510
No formal education	5 or more years	Design, fabrication, repair, operation, or inspection of pressure vessels, including at least 1 year in supervision or performance of inspection activities as described in API 510

These minimum qualifications must be documented in your application and are verified after submission. API also notes that a dishonorable military discharge does not qualify for military service credit.

API 510 Recertification Overview

API 510 inspectors must apply for recertification every 3 years through the ICP Portal. You can apply 90 days before your certification expires and still apply during a 90-day grace period after expiration, although late fees apply after the expiration date. If you do not submit your recertification application by the end of the grace period, your certification expires, and you must submit a new application and pass the full exam again.

API 510 Recertification Requirements

To recertify successfully, candidates must meet the required conditions during each recertification cycle.

1. Work Requirement – Every 3 Years

You must show that at least 20% of your time during the most recent three-year certification period was spent performing or supervising pressure vessel inspection activities as described in API 510. If you have not remained active in pressure vessel inspection work, you may need to take the full exam again.

2. Continuing Professional Development (CPD) – Every 3 Years

API 510 inspectors must complete 24 CPD hours during each 3-year certification cycle. These activities must be relevant to inspection and mechanical integrity assurance in the petroleum and petrochemical industry. API says the CPD activities should span at least two categories, and proof of completion must be uploaded to the CPD Tracking page in the ICP Portal along with the recertification application.

3. Web Quiz – Every 6 Years

Every 6 years, API 510 certificants must complete an online open-book web quiz to recertify. The quiz becomes available 90 days before expiration and stays available through the 90-day grace period after expiration. The quiz has 25 questions, gives you 4 total hours, and can be paused up to three times. If you fail once, you may retake it. If you fail a second time, you cannot recertify through the quiz route and must apply again and pass the full API 510 examination.

Final Note for API 510 Candidates

Before applying, always verify the latest official exam publications, effectiveness sheets, qualification rules, and recertification details on the API website, because exam references and policies can change by exam window. For the current cycle, API’s official API 510 page points candidates to the September 2025 to May 2026 publications’ effectiveness sheet and the related Body of Knowledge.