API 510 [exercise]

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1/74 Questions

Who is responsible when rerating calculations are required for a vessel?
- A. The chief inspector and the unit engineer
- B. The API authorized inspector
- C. A professional engineer only, is allowed to perform these calculations
- D. The manufacturer or an owner-user engineer (or his designated representative)

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Please answer these questions. Find out your score at the end.

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2.

API 510 covers vessels constructed to which fabrication codes?
- A. only ASME B&PV Section VIII
- B. only ASME B&PV Section VIII and the API/ASME Code for Unfired Pressure Vessels
- C. ASME B&PV Section VIII and other current codes (except French vessel code)
- D. any fabrication code
Correct Answer

A. D. any fabrication code

Explanation

API 510 covers vessels constructed to any fabrication code, meaning it is not limited to a specific code such as ASME B&PV Section VIII or the API/ASME Code for Unfired Pressure Vessels. This allows for flexibility in the types of vessels that can be covered under API 510.

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3.

Under which of the following condition(s) should you require the removal of safety relief device(s)?
- A. Surface corrosion on the body of the relief device
- B. If a pressure test is being conducted in which the test pressure will exceed the set pressure of the safety relief valve with the lowest setting
- C. The safety relief device was opening on a irregular, unexplainable basis
- D. Blowback had been detected and the manufacturers recommend removal
Correct Answer

A. B. If a pressure test is being conducted in which the test pressure will exceed the set pressure of the safety relief valve with the lowest setting

Explanation

The correct answer is b. If a pressure test is being conducted in which the test pressure will exceed the set pressure of the safety relief valve with the lowest setting. This means that if the pressure being tested is higher than the lowest set pressure of any safety relief valve, it is necessary to remove the safety relief device to prevent it from opening and releasing pressure during the test. This ensures that the pressure test is conducted accurately and safely.

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1
4.

As per API 510, what is the maximum allowed time between the testing of pressure relieving devices?
- A. Pressure relief valves shall be tested at intervals that are frequent enough to verify that the valves perform reliably
- B. Pressure relief devices must be tested at every shutdown
- C. 10 years
- D. 5 years
Correct Answer

A. C. 10 years

Explanation

According to API 510, the maximum allowed time between the testing of pressure relieving devices is 10 years. This means that pressure relief valves should be tested at intervals that are frequent enough to ensure their reliable performance, but the maximum time between these tests should not exceed 10 years. Therefore, option c is the correct answer.

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0
5.

Who determines if a temporary fillet weld patch may be used in a repair?
- A. The API authorized inspector
- B. An engineer competent in pressure vessel design and the API authorized inspector
- C. A repair organization which holds a valid NBIC R stamp
- D. Any of the above
Correct Answer

A. B. An engineer competent in pressure vessel design and the API authorized inspector

Explanation

An engineer competent in pressure vessel design and the API authorized inspector determine if a temporary fillet weld patch may be used in a repair. This is because the engineer is knowledgeable about the design requirements for pressure vessels and can assess whether the temporary patch meets the necessary criteria. The API authorized inspector provides oversight and ensures that the repair is conducted in accordance with industry standards and regulations. Together, they have the expertise to make an informed decision regarding the use of a temporary fillet weld patch in a repair.

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6.

During a vessel alteration, if there is a conflict between the requirements of API 510 and the construction code, which should be followed?
- A. API 510
- B. the construction code
- C. either the API 510 or the construction code based on inspector's recommendation
- D. the code with the most stringent requirements
Correct Answer

A. A. API 510

Explanation

The correct answer is a. API 510. When there is a conflict between the requirements of API 510 and the construction code during a vessel alteration, the API 510 should be followed. API 510 is a standard that provides guidelines and requirements for the inspection, repair, alteration, and rerating of pressure vessels. It is specifically designed for the inspection of pressure vessels and offers more specific and detailed requirements compared to the construction code. Therefore, in case of a conflict, the requirements of API 510 take precedence over the construction code.

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7.

What is the recommended shell temperature, per API 510 during a hydrostatic test of a vessel, 1”thick?
- A. 10 ° F above MDMT
- B. 65 ° F above ambient
- C. 30 ° F above ambient
- D. 30 ° F above testing liquids temperature
Correct Answer

A. A. 10 ° F above MDMT

Explanation

The recommended shell temperature during a hydrostatic test of a vessel that is 1" thick is 10°F above the Minimum Design Metal Temperature (MDMT). This temperature ensures that the vessel is tested under conditions that are representative of its intended service temperature range, while still allowing for a safety margin.

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8.

Determine in what two ways may the probable corrosion rate for a new vessel be determined before the first internal inspection?
- A. From data collected on vessels providing the same or similar service or from published data on vessels providing comparable service
- B. Employing highly experienced inspectors or engineers
- C. Corrosion tabs and UT readings
- D. Assuming a standard corrosion rate
Correct Answer

A. A. From data collected on vessels providing the same or similar service or from published data on vessels providing comparable service

Explanation

The probable corrosion rate for a new vessel can be determined by analyzing data collected from other vessels that have been in the same or similar service. This data can provide valuable insights into the corrosion rates experienced by similar vessels and can help estimate the probable corrosion rate for the new vessel. Additionally, published data on vessels providing comparable service can also be used to determine the probable corrosion rate. By comparing the new vessel with existing data, a reasonable estimate of the corrosion rate can be made without the need for an internal inspection.

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9.

What should contain in a progressive record for a pressure vessel?
- A. Construction and design information, operating and inspection history
- B. A complete weld map from the original construction plans
- C. The exact location on a facility plan
- D. The schedule and piping sizes for the vessel
Correct Answer

A. A. Construction and design information, operating and inspection history

Explanation

A progressive record for a pressure vessel should contain construction and design information as well as the operating and inspection history. This record is important for ensuring the safety and integrity of the pressure vessel. It allows for easy access to information about the vessel's construction, design specifications, and any modifications that have been made over time. Additionally, the operating and inspection history provides a record of the vessel's performance and any maintenance or repairs that have been done. This information is crucial for monitoring the condition of the pressure vessel and ensuring that it meets regulatory requirements.

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1
10.

When performing an external inspection on a vessel what consideration should be given to the external insulation?
- A. You may not use any plug locations used for UT thickness reading to inspect the vessel
- B. Select portions must be removed for inspections
- C. It shall always be removed to inspect underneath
- D. If insulation is in good condition and the vessel operates within the high and low temperatures stated in API 510, removal of insulation is not necessary for inspection of the vessel
Correct Answer

A. D. If insulation is in good condition and the vessel operates within the high and low temperatures stated in API 510, removal of insulation is not necessary for inspection of the vessel

Explanation

The correct answer is d. If insulation is in good condition and the vessel operates within the high and low temperatures stated in API 510, removal of insulation is not necessary for inspection of the vessel. This means that if the insulation is in good condition and the vessel is operating within the specified temperature range, there is no need to remove the insulation for inspection. This is because the insulation is not likely to affect the inspection process or the condition of the vessel.

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11.

After an alteration to a pressure vessel, in lieu of a hydrostatic test, special inspection procedures will be carried out. What must be done prior to carrying out the special inspection procedures?
- A. Review all NDE procedures prior to commencement of the NDE used to waive the hydrostatic test requirement
- B. Consult with the chief inspector of the jurisdiction
- C. Make certain it is permitted by any jurisdictional rules that may exist and consult with an engineer experienced in pressure vessel design and the Authorized Pressure Vessel Inspector
- D. Check with the NBIC Authorized inspector
Correct Answer

A. C. Make certain it is permitted by any jurisdictional rules that may exist and consult with an engineer experienced in pressure vessel design and the Authorized Pressure Vessel Inspector

Explanation

Prior to carrying out the special inspection procedures, it is important to make sure that it is allowed according to any jurisdictional rules that may be in place. This ensures that the inspection procedures are conducted in compliance with legal requirements. Additionally, consulting with an engineer experienced in pressure vessel design and the Authorized Pressure Vessel Inspector helps to ensure that the inspection is carried out correctly and effectively. This step is crucial in maintaining the safety and integrity of the pressure vessel after the alteration.

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1
12.

To exempt a vessel from internal inspections, what is the value of the corrosion rate that cannot be exceeded?
- A. 0.005” per year
- B. 0.001” between inspections not to exceed 5 years between inspections
- C. 0.001”per year
- D. 0.005” between inspections not to exceed 3 years between inspections
Correct Answer

A. A. 0.005” per year

Explanation

To exempt a vessel from internal inspections, the corrosion rate that cannot be exceeded is 0.005" per year. This means that the rate of corrosion should not exceed 0.005 inches per year for the vessel to be exempt from internal inspections.

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6
13.

If a vessel is subjected to temperatures above design, what may happen
- A. Precipitation at the grain boundaries may occur.
- B. The rupture disk may implode
- C. The relief device may fail
- D. Creep of the vessel’s material may occur
Correct Answer

A. D. Creep of the vessel’s material may occur

Explanation

When a vessel is subjected to temperatures above its design limit, the material of the vessel may undergo a phenomenon known as creep. Creep refers to the gradual deformation or elongation of a material under constant stress at high temperatures. This can lead to a loss of structural integrity and potentially cause the vessel to fail or rupture. Therefore, option d is the correct answer as it accurately identifies the potential consequence of subjecting a vessel to temperatures above its design limit.

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5
14.

The definition of pressure vessels is:
- A. A container designed to withstand internal or external pressure
- B. A vessel for the containment of process fluids with or without internal pressure
- C. A container designed to operate below atmospheric pressure
- D. A container no greater than 8” in cross section
Correct Answer

A. A. A container designed to withstand internal or external pressure

Explanation

The correct answer is a. A container designed to withstand internal or external pressure. This definition accurately describes pressure vessels as containers that are specifically designed to handle and withstand both internal and external pressure. These vessels are engineered to safely contain substances or fluids under high pressure, ensuring that they do not leak or rupture. The ability to withstand pressure is a crucial characteristic of pressure vessels, making option a the correct choice.

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1
15.

Which is the most severe stress caused by internal pressure in a cylindrical shell?
- A. Longitudinal stress acting along the longitudinal axis
- B. Circumferential stress acting along the longitudinal axis
- C. Circumferential stress acting along the circumferential axis
- D. Longitudinal stress acting along the circumferential axis
Correct Answer

A. B. Circumferential stress acting along the longitudinal axis

Explanation

The most severe stress caused by internal pressure in a cylindrical shell is the circumferential stress acting along the longitudinal axis. This stress is caused by the pressure pushing outward on the curved surface of the shell, resulting in a tensile stress that is highest in the circumferential direction. This stress is critical because it can lead to failure or rupture of the shell if it exceeds the material's strength.

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3
16.

For an above ground ‘higher risk’ vessel the maximum interval between external visual inspections is:
- A. 10 years or 1/2-remaining corrosion rate life, whichever is less
- B. 5 years
- C. 3 years
- D. There is no maximum interval
Correct Answer

A. B. 5 years

Explanation

External inspection intervals are designed to align with regular internal or on-stream inspections, occurring at intervals of no more than every 5 years. This means that for an above ground 'higher risk' vessel, the maximum interval between external visual inspections is 5 years. This ensures that the vessel is regularly inspected to identify any potential corrosion or damage that could compromise its integrity and safety.

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0
17.

What is the maximum inspection interval for a vessel with a remaining safe operating life of less than four years?
- A. The full remaining safe operating life up to a maximum of 4 years
- B. The full remaining safe operating life up to a maximum of 2 years
- C. The full remaining safe operating life up to a maximum of 1 year
- D. The full remaining life of the vessel
Correct Answer

A. B. The full remaining safe operating life up to a maximum of 2 years

Explanation

The maximum inspection interval for a vessel with a remaining safe operating life of less than four years is the full remaining safe operating life up to a maximum of 2 years. This means that the vessel should be inspected at least once within the remaining safe operating life, but no later than 2 years from the current inspection.

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3
18.

When discussing repairs to a pressure vessel what is the definition of ‘construction codes’?
- A. The NBIC
- B. The current ASME Code edition
- C. The API 510 Code
- D. The Code the vessel was constructed to including non-standard and jurisdictional special vessels
Correct Answer

A. D. The Code the vessel was constructed to including non-standard and jurisdictional special vessels

Explanation

The correct answer is d. The Code the vessel was constructed to including non-standard and jurisdictional special vessels. This means that when discussing repairs to a pressure vessel, the construction codes refer to the specific code that was followed during the vessel's original construction. This includes any non-standard requirements and jurisdictional regulations that were applicable at the time of construction.

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1
19.

After a vessel has been placed in service, what Code is used to evaluate?
- A. ASME Section VIII
- B. ASME Section V
- C. API 572
- D. API 510
Correct Answer

A. D. API 510

Explanation

After a vessel has been placed in service, API 510 is used to evaluate it. API 510 is a standard that provides guidelines for the inspection, repair, alteration, and rerating of in-service pressure vessels. It covers various aspects such as inspection intervals, methods, and criteria for assessing the condition of the vessel. This code ensures that the vessel remains safe and meets the required standards throughout its service life. ASME Section VIII and ASME Section V are not specifically designed for evaluating vessels after they have been placed in service, while API 572 focuses on inspection practices for pressure vessels during construction.

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2
20.

An in-service vessel is being repaired or altered. If there is a conflict between the requirements of API 510 and the legal jurisdiction, which should be followed?
- A. API 510
- B. the legal jurisdiction
- C. the most stringent requirements
- D. either set of requirements based on engineer and AI approval
Correct Answer

A. C. the most stringent requirements

Explanation

In this scenario, the most stringent requirements should be followed. This means that if there is a conflict between the requirements of API 510 and the legal jurisdiction, the requirements that impose the highest level of standards or regulations should be followed. This ensures that the repairs or alterations to the in-service vessel are done in accordance with the strictest guidelines to prioritize safety and compliance.

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2
21.

When a vessel is to be entered for an internal inspection which of the following precautions should be observed?
- A. Inspect the vessel for proper electrical grounding
- B. The area should be roped off and no one else is to be working in the area
- C. No hot work permits in the immediate area must be issued until the inspection is complete
- D. OSHA rules should be reviewed and followed where applicable
Correct Answer

A. D. OSHA rules should be reviewed and followed where applicable

Explanation

When a vessel is to be entered for an internal inspection, it is important to review and follow OSHA rules. OSHA (Occupational Safety and Health Administration) sets regulations and standards to ensure the safety and health of workers. By reviewing and following OSHA rules, the necessary precautions can be taken to prevent accidents, ensure proper safety equipment and procedures are in place, and minimize potential hazards during the inspection. This helps to protect the workers and maintain a safe working environment.

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22.

Which type of discontinuity can liquid penetrant inspection find?
- A. Cracks open to the surface
- B. Laminations on the surfaces of plate
- C. Internal cracking of welds
- D. Subsurface porosity
Correct Answer

A. A. Cracks open to the surface

Explanation

Liquid penetrant inspection is a nondestructive testing method used to detect surface discontinuities. It involves applying a liquid penetrant to the surface of a material and allowing it to seep into any cracks or open defects. The excess penetrant is then removed, and a developer is applied to make the penetrant visible. This method is effective in finding cracks that are open to the surface, as the liquid penetrant can easily seep into and highlight these defects. Therefore, option a is the correct answer.

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23.

For proper internal or external visual inspections, surfaces must be:
- A. Hydro blasted
- B. Grit blasted to SA 2
- C. Wire brushed
- D. The type of surface preparation depends on individual circumstances and could be any of the above
Correct Answer

A. D. The type of surface preparation depends on individual circumstances and could be any of the above

Explanation

The correct answer is d because the type of surface preparation required for proper internal or external visual inspections depends on individual circumstances. It could be any of the options mentioned, such as hydro blasting, grit blasting to SA 2, or wire brushing. The specific method chosen would depend on factors like the condition of the surface, the type of material being inspected, and the desired level of cleanliness and preparation. Therefore, there is no one-size-fits-all approach, and the choice of surface preparation method will vary based on the specific circumstances.

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24.

Who is responsible to ensure that the Authorized Inspection Agency functions in accordance with the requirements of API 510?
- A. AI
- B. Jurisdiction
- C. Owner/user
- D. Pressure vessel engineer
Correct Answer

A. C. Owner/user

Explanation

The owner/user is responsible for ensuring that the Authorized Inspection Agency functions in accordance with the requirements of API 510. This means that the owner/user is accountable for overseeing and ensuring that the inspection agency is following the necessary guidelines and standards set forth by API 510. They must ensure that the agency is conducting inspections and assessments correctly and accurately, and that they are following all the necessary protocols and procedures. Ultimately, it is the responsibility of the owner/user to ensure that the inspection agency is fulfilling their obligations in accordance with API 510.

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25.

The definition of a construction code is?
- A. Any standard used to build a vessel
- B. Any technique of construction
- C. Any standard used to repair vessel
- D. The Code or standard to which a vessel was originally built
Correct Answer

A. D. The Code or standard to which a vessel was originally built

Explanation

A construction code refers to the specific set of regulations and standards that were followed during the initial construction of a vessel. This code ensures that the vessel is built to meet certain safety and quality standards. It includes guidelines for materials, design, construction techniques, and other aspects of the vessel's construction process. The construction code serves as a reference point for assessing the vessel's compliance with the original standards and ensuring its structural integrity and safety.

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26.

The API authorized pressure vessel inspector may give prior authorization for repairs that do not involve:
- A. Radiography
- B. Pneumatic testing
- C. Final visual inspections
- D. Pressure tests
Correct Answer

A. D. Pressure tests

Explanation

The API authorized pressure vessel inspector may give prior authorization for repairs that do not involve pressure tests. This means that the inspector can approve repairs that do not require testing the vessel's ability to hold pressure. This could include repairs such as welding or replacing components that do not directly affect the vessel's pressure-holding capabilities.

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27.

After a new vessel has been installed, what must be done in order accept the vessel for operation?
- A. Base line thickness reading must be taken per NBIC regulation 6
- B. Base line thickness readings must be taken per API 572
- C. A first internal inspection.
- D. A first internal inspection, however if a manufactures’ data report (U1) assuring that the vessel is satisfactory for its intended service is available the first internal may be waived
Correct Answer

A. D. A first internal inspection, however if a manufactures’ data report (U1) assuring that the vessel is satisfactory for its intended service is available the first internal may be waived

Explanation

In order to accept a new vessel for operation, a first internal inspection must be conducted. However, if a manufacturer's data report (U1) is available and assures that the vessel is satisfactory for its intended service, the first internal inspection may be waived. This means that if the manufacturer's report provides sufficient evidence that the vessel meets all necessary requirements, there is no need for the additional inspection.

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28.

An internal inspection is required on above the ground ‘Lower-risk’ vessels:
- A. Every 10 years.
- B. Every 4 years
- C. At the half corrosion-rate life
- D. Any signs of leakage or deterioration detected in the interval between inspections
Correct Answer

A. D. Any signs of leakage or deterioration detected in the interval between inspections
29.

The surface remote from a welded joint is defined as:
- A. For vessels with inside diameters less than 60 inches 20 inches or ½ the vessel diameter
- B. 1 inch on either side of the weld or twice the minimum thickness whichever is greater
- C. 1 inch on either side of the weld or twice the minimum thickness whichever is less
- D. 2 inches on either side of the weld
Correct Answer

A. B. 1 inch on either side of the weld or twice the minimum thickness whichever is greater

Explanation

The surface remote from a welded joint is defined as 1 inch on either side of the weld or twice the minimum thickness, whichever is greater. This means that the area that is considered "remote" from the joint extends 1 inch on either side of the weld, or if the minimum thickness of the material is greater than 1 inch, it extends twice the minimum thickness. This definition ensures that an adequate distance is maintained from the weld to prevent any potential defects or weaknesses in the material.

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30.

Before non-destructive procedures are used in lieu of hydrostatic testing, what must be done?
- A. An engineer experienced in pressure vessel design and the API inspector must be consulted
- B. The API inspector must be consulted
- C. The API inspector and NBIC inspector must be consulted
- D. An experienced engineer must be consulted
Correct Answer

A. A. An engineer experienced in pressure vessel design and the API inspector must be consulted

Explanation

Before non-destructive procedures are used in lieu of hydrostatic testing, it is necessary to consult with an engineer experienced in pressure vessel design and the API inspector. This is important because these individuals have the expertise and knowledge to assess the safety and integrity of the pressure vessel. They can evaluate the suitability of non-destructive procedures and ensure that they meet the necessary standards and regulations. Consulting with both an engineer and the API inspector helps to ensure a thorough and comprehensive evaluation of the pressure vessel before alternative testing methods are employed.

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1
31.

The best description of Temper embrittlement is:
- A. Cracking due to operating at high temperatures above 650°F – 1100°F
- B. Cracking due to low temperature service
- C. Loss of ductility and notch toughness due to exposure above 650°F – 1100°F
- D. Flaking of the metal surfaces, causing dip pits due to exposure above 650ºF – 1100°F
Correct Answer

A. C. Loss of ductility and notch toughness due to exposure above 650°F – 1100°F

Explanation

Temper embrittlement refers to the loss of ductility and notch toughness of a material when it is exposed to temperatures ranging from 650°F to 1100°F. This means that the material becomes more brittle and prone to cracking, especially under low temperature service conditions. It does not refer to cracking due to high temperatures or flaking of metal surfaces.

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1
32.

Who must be consulted before the repair of a crack at a discontinuity where stress concentrations may be serious?
- A. The owner-user
- B. The pressure vessel engineer
- C. The National Board inspector
- D. The vessel manufacturer
Correct Answer

A. B. The pressure vessel engineer

Explanation

The pressure vessel engineer must be consulted before the repair of a crack at a discontinuity where stress concentrations may be serious because they have the expertise and knowledge to assess the severity of the crack and determine the appropriate repair method. They can evaluate the potential risks and ensure that the repair is done correctly to prevent any further damage or failures in the pressure vessel. The owner-user, National Board inspector, and vessel manufacturer may also be involved in the repair process, but the pressure vessel engineer is the most relevant and essential consultant in this situation.

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3
33.

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.
Correct Answer

A. C. Safety Valve.

Explanation

A safety valve is a relief device that is specifically designed to work with steam boilers. It is responsible for releasing excess pressure from the boiler to prevent potential explosions or damage. Safety valves are set to open at a predetermined pressure level, allowing steam to escape and maintain the boiler's pressure within safe limits. This ensures the safety and proper functioning of the steam boiler system.

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2
34.

When the half bead or temper bead technique of repair is proposed, the first consideration that must be given should be;
- A. Close monitoring of the welding operation
- B. A metallurgical review conducted by an engineer shall be performed to assure the proposed alternative is suitable for the application
- C. Time required to do the repair, and personnel safety
- D. Consultation with the jurisdictional requirements
Correct Answer

A. B. A metallurgical review conducted by an engineer shall be performed to assure the proposed alternative is suitable for the application

Explanation

The correct answer is b. A metallurgical review conducted by an engineer shall be performed to assure the proposed alternative is suitable for the application. This is because when using the half bead or temper bead technique of repair, it is important to assess the metallurgical aspects of the repair. Conducting a review by an engineer will help determine if the proposed alternative is appropriate and will ensure the repair is suitable for the specific application.

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3
35.

Which of the following will vessel rerating involve:
- A. Calculations from either the manufacturer or an owner-user engineer experienced in pressure vessels
- B. Review Inspection records verify the pressure vessel has been in the proposed service previously
- C. Use of Non-Code requirements as established in accordance with the alternative rules of API 572
- D. Calculations from only a manufacturer experienced in pressure vessels
Correct Answer

A. A. Calculations from either the manufacturer or an owner-user engineer experienced in pressure vessels

Explanation

Vessel rerating involves calculations from either the manufacturer or an owner-user engineer experienced in pressure vessels. This means that in order to determine the new rating for the vessel, calculations need to be done by someone who has knowledge and expertise in pressure vessels. These calculations are essential to ensure that the vessel can safely operate at the proposed service conditions. The involvement of either the manufacturer or an experienced engineer allows for accurate and reliable calculations to be made, taking into account the specific design and operating conditions of the vessel.

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1
36.

When a crack is discovered in a vessel that is in a highly stressed area, what action should you recommend to be considered as a first step in any effort to correct the flaw?
- A. Call in a pressure vessel engineer
- B. Design an overlay patch to completely cover the affected area that has rounded corners
- C. Using an insert patch, to completely remove the affected area
- D. Removing the crack using by grinding and inspect using an NDE procedure before repair by welding
Correct Answer

A. A. Call in a pressure vessel engineer

Explanation

The correct answer is a. Call in a pressure vessel engineer. When a crack is discovered in a vessel in a highly stressed area, it is important to consult a pressure vessel engineer. They are experts in assessing the integrity of the vessel and can recommend the appropriate course of action to correct the flaw. This may involve further inspections, repairs, or even replacement of the vessel if necessary. Their expertise ensures that the correct steps are taken to address the issue and prevent any potential hazards or failures.

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37.

What can be done to extend the life of a vessel with a corroded area in the shell plate 6 inches from the weld, a joint efficiency of less than 1, and a corrosion thickness currently near the minimum required thickness?
- A. Recalculate t minimum for current operating conditions using E < 1.
- B. Recalculate t minimum for current operating conditions using E = 1.
- C. Recalculate t minimum for design conditions using E = 1.
- D. Monitor the thickness during the run.
Correct Answer

A. C. Recalculate t minimum for design conditions using E = 1.

Explanation

To extend the life of a vessel with a corroded area in the shell plate, it is recommended to recalculate the minimum required thickness for design conditions using a joint efficiency of 1. This means that the vessel will be designed to withstand the maximum expected stress and pressure, considering the corroded area. By using a joint efficiency of 1, the calculation will not account for any reduction in strength due to the corrosion, ensuring that the vessel remains safe and reliable. Monitoring the thickness during operation (option d) may be necessary, but it does not address the issue of extending the vessel's life.

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1
38.

One of the steps when rerating a pressure vessel is the documentation of the:
- A. Approval of the ASME
- B. Report from an external professional engineer
- C. Approval of the operation’s engineering department
- D. Calculations from the manufacturer or the owner-user’s engineer
Correct Answer

A. D. Calculations from the manufacturer or the owner-user’s engineer

Explanation

When rerating a pressure vessel, one of the important steps is to document the calculations from the manufacturer or the owner-user's engineer. This is necessary to ensure that the vessel is being rerated correctly and can safely handle the desired operating conditions. The calculations provide the necessary technical information and analysis to determine the vessel's new design parameters and its ability to withstand the required pressure and temperature conditions. This documentation serves as a reference for future inspections, maintenance, and regulatory compliance.

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1
39.

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. erosion
- C. stress corrosion cracking
- D. ductile failure
Correct Answer

A. B. erosion

Explanation

Increasing hardness of the metal substrate may not necessarily improve its resistance to erosion. Erosion is the process of gradual wearing away of a material by the action of external forces such as flowing liquids or abrasive particles. While hardness can provide some resistance to erosion, other factors such as the composition and microstructure of the metal, as well as the specific conditions of the erosion process, also play a significant role. Therefore, simply increasing the hardness of the metal substrate may not guarantee improved resistance to erosion.

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40.

Temporary repairs to pressure vessels:
- A. must be replaced with permanent repairs during the next scheduled shutdown.
- B. may remain in place for long periods if approved by the pressure vessel engineer.
- C. may remain in place for long periods if approved by the API-authorized pressure vessel inspector.
- D. may remain in place permanently if approved by the pressure vessel engineer and the API authorized pressure vessel inspector.
Correct Answer

A. B. may remain in place for long periods if approved by the pressure vessel engineer.

Explanation

Temporary repairs to pressure vessels may remain in place for long periods if approved by the pressure vessel engineer. This means that if the engineer determines that the temporary repair is sufficient and safe, it can be left in place for an extended period of time. However, it is important to note that this approval is necessary and the repair should be replaced with permanent repairs during the next scheduled shutdown to ensure the long-term integrity of the pressure vessel.

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1
41.

When does the API-510 Inspection Code apply?
- A. Vessels constructed to API-572
- B. Vessels after they have been placed in service
- C. Pressure vessel being fabricated to ASME Section VIII, Division 1 or 2
- D. Only pressure vessels being fabricated for refinery/petro-chemical service
Correct Answer

A. B. Vessels after they have been placed in service

Explanation

The API-510 Inspection Code applies to vessels after they have been placed in service. This means that the code is applicable to vessels that are already in operation and not during the fabrication or construction process. The code provides guidelines and requirements for the inspection, repair, alteration, and rerating of in-service pressure vessels. It ensures that these vessels are maintained and operated safely, and helps in identifying any potential issues or defects that may affect their integrity and performance.

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42.

The function of an authorized inspection agency in accordance with API-510, is whose responsibility?
- A. Authorized repair organization
- B. Owner-user
- C. Authorized inspection agency
- D. Authorized engineering company
Correct Answer

A. B. Owner-user

Explanation

According to API-510, the function of an authorized inspection agency is the responsibility of the owner-user. This means that the owner-user is responsible for ensuring that an authorized inspection agency is appointed to carry out inspections in accordance with the API-510 standards. The authorized inspection agency plays a crucial role in conducting inspections and ensuring compliance with the standards, but it is ultimately the responsibility of the owner-user to ensure that this function is fulfilled.

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43.

When developing an inspection plan for equipment operating at elevated temperatures, ____________ having knowledge of elevated temperature and metallurgical effects on vessel materials of construction should be consulted
- A. A pressure vessel repair organization
- B. A registered professional engineer
- C. A corrosion specialist
- D. An authorized Inspector
Correct Answer

A. C. A corrosion specialist

Explanation

When developing an inspection plan for equipment operating at elevated temperatures, it is important to consult a corrosion specialist. This is because elevated temperatures can have significant impacts on the metallurgical properties of the vessel materials, leading to increased corrosion rates and potential degradation. A corrosion specialist will have the knowledge and expertise to understand these effects and recommend appropriate inspection and maintenance strategies to ensure the integrity and safety of the equipment.

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44.

When a corroded area of considerable size is encountered and the circumferential stresses govern, what is maximum length over which the thickness can be averaged for a vessel with an inside diameter of 48 inches?
- A. 20 percent of the vessel diameter
- B. 24 inches
- C. 20 inches
- D. 25 percent of the vessel diameter
Correct Answer

A. C. 20 inches

Explanation

When a corroded area of considerable size is encountered and the circumferential stresses govern, the maximum length over which the thickness can be averaged for a vessel with an inside diameter of 48 inches is 20 inches. This means that when calculating the average thickness of the vessel, only the thickness over a maximum length of 20 inches will be considered.

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45.

When determining the corrosion rate for a new vessel involved in changes in service conditions and the probable corrosion rate cannot be determined by either available data or experience of the owner/user, on-stream determination shall be made. What is the length of service recommended by API-510?
- A. 1000 hours
- B. 100 months
- C. 1000 days
- D. 1000 weeks
Correct Answer

A. A. 1000 hours

Explanation

The correct answer is a. 1000 hours. According to API-510, when the corrosion rate for a new vessel cannot be determined by available data or experience, on-stream determination should be made. API-510 recommends a minimum length of service of 1000 hours for this purpose.

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46.

Which of the following conditions must not be met for widely scattered pits to be ignored?
- A. No pit depth greater than 1/2 the vessel wall exclusive of the corrosion allowance
- B. Total area of pits does not exceed 7 square inches in any 8” diameter circle
- C. Sum of dimensions along a straight line does not exceed 2 inches
- D. No pit depth greater than 2/3 the vessel wall exclusive of the corrosion allowance
Correct Answer

A. D. No pit depth greater than 2/3 the vessel wall exclusive of the corrosion allowance

Explanation

The given answer states that pits with a depth greater than 2/3 the vessel wall, exclusive of the corrosion allowance, cannot be ignored. This means that if any pit has a depth greater than this threshold, it cannot be overlooked. Therefore, option d is the correct answer.

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0
47.

Risk-based Inspection combines the assessment of?
- A. likelihood of poor inspection and the consequence of failure
- B. likelihood of failure and the effects on plant operation of failure
- C. chances of failure and the cost of failure
- D. likelihood of failure and the consequence of failure
Correct Answer

A. D. likelihood of failure and the consequence of failure

Explanation

Risk-based Inspection combines the assessment of the likelihood of failure and the consequence of failure. This means that it takes into account both the probability of a failure occurring and the potential impact or consequences of that failure. By considering both factors, risk-based inspection allows for a more comprehensive evaluation of the risks associated with a particular inspection or maintenance activity. This approach helps prioritize resources and efforts towards areas that have a higher likelihood and consequence of failure, ultimately improving safety and efficiency.

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48.

When calculating the MAWP based on a weld joint factor less than 1.0, the surface of the weld is identified by which of the following?
- A. The surface of the weld includes 2 inches or twice minimum thickness on either side of the weld, whichever is less
- B. The surface of the weld includes 7 inches or twice minimum thickness on either side of the weld, whichever is less
- C. The surface of the weld includes 1 inch or twice minimum thickness on either side of the weld, whichever is less
- D. The surface of the weld includes 2 inches or twice minimum thickness on either side of the weld, whichever is less
Correct Answer

A. C. The surface of the weld includes 1 inch or twice minimum thickness on either side of the weld, whichever is less

Explanation

When calculating the Maximum Allowable Working Pressure (MAWP) based on a weld joint factor less than 1.0, the surface of the weld is identified as 1 inch or twice the minimum thickness on either side of the weld, whichever is less. This means that when determining the MAWP, the area of the weld that is considered for calculations is limited to a distance of 1 inch or twice the minimum thickness, depending on which value is smaller. This ensures that the calculations account for the strength and integrity of the weld joint in determining the maximum allowable pressure.

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49.

What two conditions should be considered in selecting the techniques(s) to be used for the inspection of a pressure vessel?
- A. The condition of the vessel and the recommendations described by NBIC
- B. The condition of the vessel and the recommendations of the repair organization
- C. The recommendation of the repair organization and the environment in which the vessel operates
- D. The condition of the vessel and the environment in which the vessel operates
Correct Answer

A. D. The condition of the vessel and the environment in which the vessel operates

Explanation

The selection of inspection techniques for a pressure vessel should consider both the condition of the vessel and the environment in which it operates. The condition of the vessel will determine the level of inspection required and the specific techniques needed to identify any potential defects or damage. The environment in which the vessel operates, such as high temperature or corrosive conditions, will also impact the choice of inspection techniques as certain methods may be more effective in detecting specific types of damage. Therefore, considering both the vessel's condition and operating environment is crucial in selecting the appropriate inspection techniques.

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API 510 [exercise]

Who is responsible when rerating calculations are required for a vessel?

Quiz Preview

API 510 covers vessels constructed to which fabrication codes?

Under which of the following condition(s) should you require the removal of safety relief device(s)?

As per API 510, what is the maximum allowed time between the testing of pressure relieving devices?

Who determines if a temporary fillet weld patch may be used in a repair?

During a vessel alteration, if there is a conflict between the requirements of API 510 and the construction code, which should be followed?

What is the recommended shell temperature, per API 510 during a hydrostatic test of a vessel, 1”thick?

Determine in what two ways may the probable corrosion rate for a new vessel be determined before the first internal inspection?

What should contain in a progressive record for a pressure vessel?

When performing an external inspection on a vessel what consideration should be given to the external insulation?

After an alteration to a pressure vessel, in lieu of a hydrostatic test, special inspection procedures will be carried out. What must be done prior to carrying out the special inspection procedures?

To exempt a vessel from internal inspections, what is the value of the corrosion rate that cannot be exceeded?

If a vessel is subjected to temperatures above design, what may happen

The definition of pressure vessels is:

Which is the most severe stress caused by internal pressure in a cylindrical shell?

For an above ground ‘higher risk’ vessel the maximum interval between external visual inspections is:

What is the maximum inspection interval for a vessel with a remaining safe operating life of less than four years?

When discussing repairs to a pressure vessel what is the definition of ‘construction codes’?

After a vessel has been placed in service, what Code is used to evaluate?

An in-service vessel is being repaired or altered. If there is a conflict between the requirements of API 510 and the legal jurisdiction, which should be followed?

When a vessel is to be entered for an internal inspection which of the following precautions should be observed?

Which type of discontinuity can liquid penetrant inspection find?

For proper internal or external visual inspections, surfaces must be:

Who is responsible to ensure that the Authorized Inspection Agency functions in accordance with the requirements of API 510?

The definition of a construction code is?

The API authorized pressure vessel inspector may give prior authorization for repairs that do not involve:

After a new vessel has been installed, what must be done in order accept the vessel for operation?

An internal inspection is required on above the ground ‘Lower-risk’ vessels:

The surface remote from a welded joint is defined as:

Before non-destructive procedures are used in lieu of hydrostatic testing, what must be done?

The best description of Temper embrittlement is:

Who must be consulted before the repair of a crack at a discontinuity where stress concentrations may be serious?

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

When the half bead or temper bead technique of repair is proposed, the first consideration that must be given should be;

Which of the following will vessel rerating involve:

When a crack is discovered in a vessel that is in a highly stressed area, what action should you recommend to be considered as a first step in any effort to correct the flaw?

What can be done to extend the life of a vessel with a corroded area in the shell plate 6 inches from the weld, a joint efficiency of less than 1, and a corrosion thickness currently near the minimum required thickness?

One of the steps when rerating a pressure vessel is the documentation of the:

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

Temporary repairs to pressure vessels:

When does the API-510 Inspection Code apply?

The function of an authorized inspection agency in accordance with API-510, is whose responsibility?

When developing an inspection plan for equipment operating at elevated temperatures, ____________ having knowledge of elevated temperature and metallurgical effects on vessel materials of construction should be consulted

When a corroded area of considerable size is encountered and the circumferential stresses govern, what is maximum length over which the thickness can be averaged for a vessel with an inside diameter of 48 inches?

When determining the corrosion rate for a new vessel involved in changes in service conditions and the probable corrosion rate cannot be determined by either available data or experience of the owner/user, on-stream determination shall be made. What is the length of service recommended by API-510?

Which of the following conditions must not be met for widely scattered pits to be ignored?

Risk-based Inspection combines the assessment of?

When calculating the MAWP based on a weld joint factor less than 1.0, the surface of the weld is identified by which of the following?

What two conditions should be considered in selecting the techniques(s) to be used for the inspection of a pressure vessel?