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NBBI Inservice Inspector (IS) practice questions

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Question 1NBIC (National Board Inspection Code)

Under the NBIC, which document is used to record that a pressure vessel has been inspected and found suitable for continued service at a stated set of conditions?

  1. Form R-2 Manufacturer's Partial Data Report
  2. Form R-1 Manufacturer's Data Report
  3. Form R-4 or equivalent inspection report authorized by the jurisdiction Correct answer.
  4. Form R-1A Inspector's Data Report for Installation

Explanation

The NBIC recognizes inspection reports (commonly Form R-4 or a jurisdiction-approved equivalent) as the record of an in-service inspection documenting condition and continued-service limits. Manufacturer's data reports such as R-1 and R-2 document new construction, not in-service findings. The inspector's report is the vehicle that ties the inspection to the object and its stated operating limits.

Question 2NBIC (National Board Inspection Code)

An owner requests that a pressure-relief valve on an air receiver be set at a higher pressure than the vessel's current maximum allowable working pressure. What does the NBIC require before the change can be accepted?

  1. Nothing, provided the valve is tested after adjustment
  2. Replacement of the vessel's nameplate with a higher stamped pressure
  3. Only verbal approval from the inspector who performed the last inspection
  4. A new maximum allowable working pressure must be established by a qualified engineering evaluation and the change documented Correct answer.

Explanation

Any increase in relief-valve set pressure above the current MAWP requires that a new MAWP be justified by engineering evaluation of the vessel's remaining thickness and construction. The revised limit and the basis for it must then be documented in the inspection record. An inspector cannot authorize an overpressure condition by informal agreement.

Question 3NBIC (National Board Inspection Code)

Which organization publishes the National Board Inspection Code and administers the NB and R stamp programs?

  1. The International Organization for Standardization
  2. The American Petroleum Institute
  3. The American Society of Mechanical Engineers
  4. The National Board of Boiler and Pressure Vessel Inspectors Correct answer.

Explanation

The National Board of Boiler and Pressure Vessel Inspectors publishes the NBIC and administers the NB and R accreditation programs. ASME publishes the construction codes (Section I, Section VIII) that the NBIC references for repairs and alterations. API and ISO publish unrelated standards for other industries.

Question 4NBIC (National Board Inspection Code)

A repair to a Section VIII Division 1 vessel involves welding on a pressure-retaining boundary. Which of the following is a required element of the repair documentation under the NBIC?

  1. A description of the repair, the welding procedure and qualifications, and the inspector's acceptance Correct answer.
  2. Recalculation of the vessel's corrosion allowance by the original manufacturer
  3. A hydrostatic test of the entire vessel in every case
  4. A copy of the original mill test reports for every plate in the vessel

Explanation

A repair record must describe the work performed and demonstrate that qualified procedures and welders were used, followed by inspection acceptance. Full mill traceability and full-vessel hydrostatic testing are not universally required for every repair. The original manufacturer is not necessarily involved in an in-service repair.

Question 5NBIC (National Board Inspection Code)

What distinguishes an alteration from a repair under the NBIC?

  1. An alteration changes the item in a way that affects its pressure-retaining capability or rating, whereas a repair restores it to a safe condition Correct answer.
  2. An alteration is always performed by the original manufacturer
  3. An alteration never requires a new data report
  4. A repair changes the item's design or rating, while an alteration restores it

Explanation

The NBIC distinguishes repairs, which restore an item to a safe and serviceable condition, from alterations, which change the item so that its pressure-retaining capability or rating is affected. Alterations typically require engineering evaluation and a new data report. The distinction drives the documentation, testing, and stamping requirements.

Question 6NBIC (National Board Inspection Code)

During an internal inspection of a fired boiler, the inspector finds scattered pitting on the waterside of the shell. Which NBIC concept governs the decision on whether the boiler may remain in service?

  1. The age of the boiler relative to its design life
  2. The color and appearance of the pit surfaces
  3. The inspector's personal judgment alone, with no documentation
  4. Evaluation of remaining thickness against the minimum required thickness for the stated pressure Correct answer.

Explanation

Continued-service decisions for thinning damage such as pitting are based on whether remaining thickness meets the minimum required thickness calculated for the operating pressure and temperature. The evaluation should be documented with the inspection findings. Age, appearance, and undocumented opinion are not acceptance criteria.

Question 7NBIC (National Board Inspection Code)

An inspector is asked to witness the hydrostatic test of a repaired boiler. What is the general NBIC test pressure requirement for a hydrostatic test after repair?

  1. Twice the maximum allowable working pressure
  2. 0.5 times the maximum allowable working pressure
  3. Equal to the maximum allowable working pressure in all cases
  4. 1.5 times the maximum allowable working pressure, unless the code or jurisdiction specifies otherwise Correct answer.

Explanation

The NBIC generally requires a hydrostatic test at 1.5 times the MAWP for repaired items, subject to any code-specific or jurisdictional adjustments. The test confirms the integrity of the repaired boundary before return to service. Lower or arbitrary multiples do not satisfy the requirement.

Question 8NBIC (National Board Inspection Code)

Which of the following best describes the role of the authorized inspector in the NBIC repair process?

  1. Setting the vessel's original design pressure
  2. Performing the welding personally
  3. Certifying that the repair was performed in accordance with the code and the approved procedure Correct answer.
  4. Issuing the R stamp on behalf of the National Board

Explanation

The authorized inspector verifies that the repair was performed in accordance with the NBIC, the approved repair procedure, and applicable construction code requirements, then documents that acceptance. The inspector does not perform the welding or hold the R stamp; the stamp is applied by the accredited repair organization. The design pressure is set by engineering evaluation, not by the inspector.

Question 9NBIC (National Board Inspection Code)

A pressure vessel has been out of service and is being returned to service after a period of storage. What is the most appropriate NBIC-based action before return to service?

  1. Only a visual check of the exterior paint
  2. An inspection to verify condition, including internal examination where accessible, and documentation of findings Correct answer.
  3. Replacement of all relief valves regardless of condition
  4. No action is needed if the vessel was not modified

Explanation

Vessels returning to service after storage should be inspected to confirm that no deterioration occurred and that the item remains suitable for its intended service. Findings must be documented in the inspection record. Exterior appearance alone does not establish internal condition, and blanket replacement of relief valves is not a code requirement.

Question 10NBIC (National Board Inspection Code)

Under the NBIC, what is the significance of the 'R' stamp?

  1. It indicates the item was originally constructed to ASME rules
  2. It is applied by an accredited organization to certify that a repair or alteration was performed in accordance with the NBIC Correct answer.
  3. It certifies the inspector's personal qualifications
  4. It marks the item as retired from service

Explanation

The R stamp is applied by a repair organization accredited by the National Board to certify that the repair or alteration was performed in accordance with the NBIC. It is not a construction stamp and does not certify individual inspectors. Retired items are not marked with an R stamp.

Question 11NBIC (National Board Inspection Code)

An inspector is evaluating a welded repair on a Section I boiler. Which document should be consulted to confirm that the welding procedure and welder qualifications are acceptable?

  1. The applicable construction code and the repair organization's qualified procedures Correct answer.
  2. The relief valve manufacturer's catalog
  3. The vessel's original purchase order
  4. The owner's maintenance manual

Explanation

Welding procedures and welder performance qualifications must meet the applicable construction code (for example, Section IX as referenced by Section I) and be documented by the repair organization. Purchase orders, maintenance manuals, and catalogs do not establish code qualification. The inspector verifies qualification against these code requirements.

Question 12NBIC (National Board Inspection Code)

What is the purpose of a jurisdictional inspection requirement in the NBIC context?

  1. To exempt owners from documentation requirements
  2. To replace the NBIC with local rules
  3. To establish the legal authority and frequency for inspections within the jurisdiction Correct answer.
  4. To set the purchase price of pressure equipment

Explanation

Jurisdictions adopt laws and rules that establish inspection authority, frequency, and reporting requirements for boilers and pressure vessels within their boundaries. The NBIC provides the technical framework that jurisdictions commonly adopt or reference. Jurisdictional rules do not eliminate documentation obligations.

Question 13NBIC (National Board Inspection Code)

An owner wants to install a used pressure vessel obtained from another facility. Which NBIC consideration is most relevant to the acceptability of the installation?

  1. The vessel's original color and finish
  2. The distance the vessel traveled to the new site
  3. The number of previous owners
  4. Verification of the vessel's history, condition, and suitability for the new service conditions Correct answer.

Explanation

Installing a used vessel requires verification of its history, current condition, and suitability for the new service, including pressure, temperature, and fluid compatibility. The inspection record should document the basis for acceptance. Cosmetic or logistical factors do not determine code acceptability.

Question 14NBIC (National Board Inspection Code)

Which of the following is the best description of the NBIC's relationship to ASME construction codes?

  1. The NBIC provides rules for in-service inspection, repairs, and alterations that reference the original construction code Correct answer.
  2. The NBIC applies only to non-code vessels
  3. The NBIC and ASME codes are identical documents
  4. The NBIC supersedes ASME codes for all new construction

Explanation

The NBIC governs in-service inspection, repair, alteration, and rerating of boilers and pressure vessels, and it references the original construction code (such as ASME Section I or VIII) for design and material requirements. It does not replace construction codes and is not identical to them. Non-code vessels may be addressed under specific NBIC provisions, but that is not the scope of the code as a whole.

Question 15NBIC (National Board Inspection Code)

An inspector finds that a relief valve on a steam boiler has been gagged to prevent it from lifting. What is the appropriate NBIC-based response?

  1. Require removal of the gag and verification that the valve is functional before continued operation Correct answer.
  2. Accept the condition if the boiler is operating below MAWP
  3. Record the condition and continue until the next scheduled inspection
  4. Recommend reducing the boiler's operating pressure permanently

Explanation

A gagged relief valve defeats the required overpressure protection and constitutes a condition that must be corrected before continued operation. The valve must be returned to a functional state and verified. Documenting the condition without correction does not satisfy the requirement to protect the item.

Question 16NBIC (National Board Inspection Code)

What does the NBIC require regarding the retention of inspection records by the owner or user?

  1. Only financial records need to be retained
  2. Records must be maintained and made available for review as required by the code and jurisdiction Correct answer.
  3. Records may be discarded after the inspector leaves the site
  4. Records are the sole property of the inspector

Explanation

The NBIC requires that inspection and repair records be maintained and available for review, consistent with jurisdictional requirements. These records support future inspections and demonstrate continued-service decisions. Discarding them after inspection undermines traceability.

Question 17NBIC (National Board Inspection Code)

A pressure vessel's nameplate is missing. What is the most appropriate NBIC approach before performing repairs?

  1. Reconstruct the necessary design information through engineering evaluation and documentation before repair Correct answer.
  2. Assume the vessel is non-code and exempt from all requirements
  3. Stamp a new nameplate with the repair organization's own pressure rating
  4. Proceed with repairs and ignore the missing nameplate

Explanation

When nameplate data are missing, the necessary design information must be reconstructed through engineering evaluation, including material and thickness assessment, and documented before repairs proceed. This establishes the basis for the repair and any rerating. Assuming exemption or applying an arbitrary rating is not acceptable.

Question 18NBIC (National Board Inspection Code)

Which of the following conditions would most likely require an engineering evaluation before a pressure vessel is returned to service?

  1. A localized area of wall thinning below the calculated minimum required thickness Correct answer.
  2. A loose insulation jacket fastener
  3. A faded warning label
  4. A minor cosmetic scratch on exterior paint

Explanation

Wall thinning below the calculated minimum required thickness affects the vessel's ability to safely contain pressure and requires engineering evaluation, which may include rerating or repair. Cosmetic, insulation, and labeling issues do not affect pressure-boundary integrity in the same way. The evaluation must be documented.

Question 19NBIC (National Board Inspection Code)

An inspector is reviewing a repair organization's quality control manual before accepting repair work. What is the inspector primarily confirming?

  1. The manual is at least 100 pages long
  2. The organization has the lowest bid for the work
  3. The organization has a documented quality program covering the repair scope, including procedures and inspection hold points Correct answer.
  4. The manual's cover page is signed in blue ink

Explanation

The repair organization's quality program must document how repairs will be controlled, including procedures, material control, welding qualification, inspection hold points, and records. The inspector confirms that the program covers the scope of work being performed. Formatting details, price, and length are not acceptance criteria.

Question 20NBIC (National Board Inspection Code)

What is the general NBIC requirement for a hydrostatic test when a pressure vessel is rerated to a higher maximum allowable working pressure?

  1. No test is required because the vessel was previously tested
  2. A hydrostatic test at the new MAWP times the applicable test factor is generally required Correct answer.
  3. Only a pneumatic test at the old MAWP is acceptable
  4. A vacuum test is required in all cases

Explanation

When a vessel is rerated to a higher MAWP, the rerating must be supported by engineering evaluation and generally by a hydrostatic test at the new MAWP multiplied by the applicable test factor. This confirms the vessel's integrity at the revised limit. Prior testing at the old MAWP does not demonstrate adequacy at the new one.

Question 21NBIC (National Board Inspection Code)

Which of the following best describes a 'hold point' in an NBIC repair quality program?

  1. A type of welding position
  2. A financial milestone in the repair contract
  3. A point at which work must stop until the required inspection or verification is completed Correct answer.
  4. A storage location for spare parts

Explanation

A hold point is a defined stage in the work at which further progress is prohibited until the specified inspection or verification has been completed and accepted. Hold points ensure that critical steps, such as weld completion before testing, are verified. They are not storage, financial, or welding-position terms.

Question 22NBIC (National Board Inspection Code)

An inspector observes that a repair welder is using a procedure that has not been qualified. What is the correct action?

  1. Document the observation and accept the weld if it looks sound
  2. Allow the work to continue because the welder is experienced
  3. Approve the procedure retroactively without testing
  4. Stop the work and require qualification of the procedure before continuing Correct answer.

Explanation

Welding must be performed with a qualified procedure and qualified welders; unqualified work must be stopped until qualification is established. Visual appearance alone does not demonstrate that the weld meets code requirements. Retroactive approval without qualification testing is not permitted.

Question 23NBIC (National Board Inspection Code)

What does the NBIC generally require when an alteration is made to a pressure vessel?

  1. No documentation if the alteration is small
  2. Notification to the relief valve manufacturer only
  3. Only the owner's verbal approval
  4. A new data report documenting the alteration, with engineering evaluation and inspection Correct answer.

Explanation

Alterations require engineering evaluation to confirm the revised design is adequate and a new data report documenting the change, inspection, and any testing. Verbal approval or silence for small changes does not meet the requirement. The relief valve manufacturer is not the documenting authority.

Question 24NBIC (National Board Inspection Code)

An inspector is evaluating a pressure vessel for continued service and finds that the corrosion allowance has been consumed but the measured thickness still exceeds the minimum required thickness. What is the appropriate conclusion?

  1. The MAWP must be doubled to compensate
  2. The vessel may remain in service at the current rating, with continued monitoring and documentation Correct answer.
  3. The vessel must be rerated to a lower pressure regardless of thickness
  4. The vessel must be immediately retired from service

Explanation

If measured thickness still meets or exceeds the minimum required thickness for the current rating, the vessel may remain in service even though the nominal corrosion allowance has been consumed. Continued monitoring and documentation of future thickness readings are appropriate. Retirement or rerating is required only when thickness falls below the minimum required.

Question 25NBIC (National Board Inspection Code)

Which of the following is a responsibility of the owner or user under the NBIC?

  1. Issuing R stamps to repair organizations
  2. Certifying welders on behalf of the National Board
  3. Performing all welding personally
  4. Ensuring that required inspections are performed and records maintained Correct answer.

Explanation

The owner or user is responsible for arranging required inspections and maintaining records that demonstrate continued suitability for service. Welding, stamp issuance, and welder certification are performed by accredited organizations and qualified personnel, not by the owner as such.

Question 26NBIC (National Board Inspection Code)

Under the NBIC, which document is the primary reference for rules covering the inspection, repair, and alteration of boilers and pressure vessels after they are placed in service?

  1. API 510
  2. NBIC (National Board Inspection Code) Correct answer.
  3. ASME Section I
  4. ASME Section VIII, Division 1

Explanation

The NBIC is the post-construction code that provides rules for in-service inspection, repair, and alteration of boilers and pressure vessels. ASME construction codes govern new construction, while API 510 is a separate inspection standard for certain vessels.

Question 27NBIC (National Board Inspection Code)

Which NBIC Part specifically addresses the requirements for installation, inspection, and repair of pressure relief devices?

  1. Part 4 Correct answer.
  2. Part 1
  3. Part 2
  4. Part 3

Explanation

NBIC Part 4 is dedicated to pressure relief devices, covering their installation, inspection, repair, and testing. Parts 1, 2, and 3 cover installation, inspection, and repairs/alterations respectively.

Question 28NBIC (National Board Inspection Code)

During an external inspection of a power boiler, the inspector observes that the insulation has been removed from a section of the steam drum. What is the most appropriate action under the NBIC?

  1. Assume the area was exposed for maintenance and take no further action
  2. Recommend hydrostatic testing of the drum
  3. Document the exposed area and perform a visual examination of the drum surface for cracks or corrosion Correct answer.
  4. Require the insulation to be reinstalled before continuing the inspection

Explanation

When insulation is removed, it provides an opportunity to examine normally hidden surfaces. The inspector should document and examine the exposed area for defects such as cracks, corrosion, or distortion, as required by NBIC inspection practices.

Question 29NBIC (National Board Inspection Code)

What is the general NBIC requirement for the minimum thickness of a pressure vessel shell when corrosion has occurred?

  1. It must be at least the original design thickness
  2. It must be replaced immediately regardless of thickness
  3. It must be determined by engineering evaluation to ensure safe operation Correct answer.
  4. It must be at least 50% of the original thickness

Explanation

The NBIC requires that when corrosion or other deterioration reduces thickness, an engineering evaluation be performed to determine if the vessel is safe for continued service at its designated pressure. There is no simple percentage rule; the evaluation considers design conditions and remaining strength.

Question 30NBIC (National Board Inspection Code)

An inspector is reviewing a repair plan for a boiler. The plan includes welding on a pressure-retaining component. Which of the following must be included in the repair plan according to the NBIC?

  1. A qualified welding procedure specification and welder performance qualifications Correct answer.
  2. A list of all personnel who will be involved
  3. A schedule of all future inspections
  4. A copy of the original manufacturer's data report

Explanation

NBIC Part 3 requires that repairs involving welding be performed in accordance with qualified welding procedure specifications (WPS) and by welders who are performance qualified. This ensures the repair meets the required mechanical properties and integrity.

Question 31NBIC (National Board Inspection Code)

Which of the following best describes the role of the authorized inspector during a hydrostatic test of a repaired pressure vessel?

  1. The inspector must witness the test and verify that the required test pressure is held for the specified time Correct answer.
  2. The inspector must perform the test without any assistance
  3. The inspector must operate the test equipment
  4. The inspector must calculate the test pressure but need not be present

Explanation

The authorized inspector's role is to witness the hydrostatic test, verify that the test pressure is correctly applied and held for the required duration, and examine the vessel for leaks or deformation. The inspector does not operate equipment but ensures the test is conducted properly.

Question 32NBIC (National Board Inspection Code)

Under the NBIC, what is the purpose of a 'repair' as opposed to an 'alteration'?

  1. A repair changes the design pressure, while an alteration restores the original condition
  2. A repair is always performed by the original manufacturer, while an alteration is performed by any organization
  3. A repair restores a component to a safe condition, while an alteration changes the design or operating parameters Correct answer.
  4. A repair requires a new nameplate, while an alteration does not

Explanation

The NBIC distinguishes repairs, which restore equipment to a safe and operable condition without changing design parameters, from alterations, which involve a change in design pressure, temperature, or other characteristics. Alterations typically require new nameplates and revised documentation.

Question 33NBIC (National Board Inspection Code)

Which of the following is a key responsibility of the owner or user under the NBIC?

  1. Performing all inspections personally
  2. Manufacturing the pressure vessel
  3. Designing the pressure vessel
  4. Maintaining records of inspections, repairs, and alterations Correct answer.

Explanation

The NBIC assigns the owner or user the responsibility for maintaining records of inspections, repairs, and alterations, and for ensuring that required inspections are performed. Design and manufacturing are typically the responsibility of the manufacturer.

Question 34NBIC (National Board Inspection Code)

An inspector finds that a pressure vessel has been rerated to a higher maximum allowable working pressure (MAWP). What is the most appropriate NBIC action?

  1. The inspector should ignore the rerating if the original nameplate is intact
  2. The rerating must be documented and the vessel must be marked with the new MAWP Correct answer.
  3. The vessel must be immediately replaced
  4. No action is required if the vessel appears sound

Explanation

When a pressure vessel is rerated to a higher MAWP, the NBIC requires that the rerating be based on an engineering evaluation and that the vessel be marked with the new MAWP. This ensures that all parties are aware of the updated operating limits.

Question 35NBIC (National Board Inspection Code)

During an internal inspection of a fired boiler, the inspector notices a crack in a tube sheet ligament. What is the most appropriate immediate action under the NBIC?

  1. Monitor the crack during the next inspection
  2. Apply a surface coating to the crack
  3. Recommend repairs in accordance with NBIC Part 3 Correct answer.
  4. Reduce the operating pressure by 10% and continue operation

Explanation

Cracks in pressure-retaining components such as tube sheets are serious defects that can compromise integrity. The NBIC requires that such defects be repaired in accordance with Part 3 requirements, which may include welding or component replacement.

Question 36NBIC (National Board Inspection Code)

An inspector is evaluating a used pressure vessel for installation at a new facility. The vessel's nameplate shows a design pressure of 150 psi, but the new service requires 200 psi. What is the most appropriate NBIC action?

  1. Install the vessel and operate at 200 psi because the nameplate is just a guideline
  2. Perform an engineering evaluation to determine if the vessel can be rerated to 200 psi Correct answer.
  3. Reject the vessel because used vessels cannot be rerated
  4. Reduce the design pressure on the nameplate to 100 psi

Explanation

The NBIC permits rerating of pressure vessels based on engineering evaluation. The inspector should ensure that a proper evaluation is performed to determine if the vessel can safely operate at the higher pressure, and if so, the rerating must be documented and marked.

Question 37NBIC (National Board Inspection Code)

Which of the following best describes the NBIC requirement for inspection of a pressure relief valve on a steam boiler?

  1. Relief valves must be inspected annually and tested for set pressure
  2. Relief valves require no inspection if they are sealed
  3. Relief valves must be inspected at each internal boiler inspection and tested for operation Correct answer.
  4. Relief valves must be replaced every five years

Explanation

NBIC Part 4 requires that pressure relief devices be inspected at each internal inspection of the boiler and tested to verify they operate properly. Seals do not eliminate the need for inspection and testing.

Question 38NBIC (National Board Inspection Code)

An inspector is reviewing the quality control manual of a repair organization. Which element is essential to ensure that repairs meet NBIC requirements?

  1. A list of all employees' vacation schedules
  2. A description of the organization's marketing strategy
  3. A system for controlling welding procedures and welder qualifications Correct answer.
  4. A copy of the organization's tax returns

Explanation

A repair organization's quality control manual must include provisions for controlling welding procedures, welder qualifications, and other critical processes to ensure repairs comply with the NBIC. Marketing, vacation schedules, and tax returns are irrelevant to repair quality.

Question 39NBIC (National Board Inspection Code)

What is the primary purpose of a 'hold point' in a repair quality program under the NBIC?

  1. To specify a point where the owner must pay for the repair
  2. To indicate a point where the inspector is not required
  3. To allow the repair organization to proceed without inspection
  4. To designate a point in the repair process where work must stop until the inspector provides approval Correct answer.

Explanation

A hold point is a designated stage in the repair process where work must be paused until the authorized inspector has performed the required inspection and given approval to proceed. This ensures critical steps are verified before continuing.

Question 40NBIC (National Board Inspection Code)

An inspector finds that a repair welder is using a welding procedure that has not been qualified. What is the correct action under the NBIC?

  1. Accept the weld if it passes a visual inspection
  2. Document the nonconformance and allow the repair to proceed
  3. Allow the welder to continue if the welder is experienced
  4. Stop the welding and require the use of a qualified welding procedure Correct answer.

Explanation

The NBIC requires that all welding be performed in accordance with qualified welding procedure specifications. If a welder is using an unqualified procedure, the inspector must stop the work and require qualification before proceeding.

Question 41NBIC (National Board Inspection Code)

Under the NBIC, what is required when an alteration is made to a pressure vessel?

  1. The alteration only requires verbal approval from the owner
  2. The alteration must be documented and the vessel must be marked with the new design conditions Correct answer.
  3. The alteration must be reported to the manufacturer only
  4. The alteration can be performed without documentation if it is minor

Explanation

Alterations to pressure vessels must be documented, and the vessel must be marked with the new design conditions, such as MAWP and temperature. This ensures that the vessel's operating limits are clearly identified and records are maintained.

Question 42NBIC (National Board Inspection Code)

An inspector is evaluating a pressure vessel for continued service and finds that the corrosion allowance has been consumed in a localized area. What is the most appropriate NBIC action?

  1. An engineering evaluation must be performed to determine fitness for continued service Correct answer.
  2. The vessel must be immediately taken out of service
  3. The vessel can continue operating at the same pressure without further action
  4. The area must be painted to prevent further corrosion

Explanation

When corrosion allowance is consumed, the NBIC requires an engineering evaluation to determine if the vessel is still suitable for continued service at its designated pressure. The evaluation may result in a reduced MAWP, repair, or retirement.

Question 43NBIC (National Board Inspection Code)

Which of the following is an acceptable method for repairing a crack in a pressure vessel according to the NBIC?

  1. Ignoring the crack if it is less than one inch long
  2. Drilling a hole at the crack tip without welding
  3. Applying a sealant over the crack
  4. Welding after proper preparation and qualification Correct answer.

Explanation

The NBIC permits repair of cracks by welding, provided the welding procedure and welder are qualified, and proper preparation (such as gouging out the crack) is performed. Sealants or ignoring cracks are not acceptable repair methods.

Question 44NBIC (National Board Inspection Code)

What is the NBIC requirement for the inspection of a boiler that has been out of service for more than one year before it is returned to service?

  1. A hydrostatic test is always required regardless of condition
  2. Only an external inspection is required
  3. No inspection is required if the boiler was properly stored
  4. A full internal and external inspection is required before return to service Correct answer.

Explanation

The NBIC requires that boilers out of service for an extended period receive a full internal and external inspection before being returned to service to ensure they are in safe operating condition. A hydrostatic test may be required depending on the inspection findings.

Question 45NBIC (National Board Inspection Code)

An inspector is reviewing a repair to a boiler drum. The repair involves welding a patch over a thinned area. Which of the following must be verified before the repair is accepted?

  1. The patch is made from a material with a higher strength than the drum
  2. The patch material matches the drum material and the welding procedure is qualified Correct answer.
  3. The patch is painted to match the drum color
  4. The patch is installed without any documentation

Explanation

For a welded patch repair, the NBIC requires that the patch material be compatible with the drum material and that the welding procedure and welder be qualified. Documentation of the repair is also required.

Question 46NBIC (National Board Inspection Code)

An inspector is evaluating a pressure vessel that has experienced a fire. What is the most appropriate NBIC action?

  1. Only a hydrostatic test is required
  2. The vessel must be immediately scrapped
  3. The vessel can be returned to service without inspection if it appears undamaged
  4. A thorough inspection and engineering evaluation must be performed to assess the effects of the fire Correct answer.

Explanation

A pressure vessel exposed to fire may have suffered metallurgical damage, distortion, or reduced strength. The NBIC requires a thorough inspection and engineering evaluation to determine if the vessel is safe for continued service, which may include mechanical testing and hydrostatic testing.

Question 47NBIC (National Board Inspection Code)

Which of the following conditions would most likely require an engineering evaluation before a pressure vessel is returned to service after a repair?

  1. Painting of the external surface
  2. Replacement of a gasket on a manway
  3. Welding on a pressure-retaining boundary that involves a change in design Correct answer.
  4. Replacement of insulation

Explanation

Welding on a pressure-retaining boundary that involves a change in design (such as a change in thickness or material) is considered an alteration and requires an engineering evaluation to ensure the vessel remains safe for its intended service. Routine maintenance like gasket replacement or painting does not typically require such evaluation.

Question 48NBIC (National Board Inspection Code)

An inspector finds that a pressure vessel's nameplate is missing. What is the most appropriate NBIC approach before performing repairs?

  1. Attempt to reconstruct the design conditions through records or engineering evaluation and mark the vessel accordingly Correct answer.
  2. Install a new nameplate with generic values
  3. Proceed with repairs using assumed design conditions
  4. Declare the vessel unrepairable and scrap it

Explanation

When a nameplate is missing, the NBIC requires that the design conditions be established through available records, such as manufacturer's data reports, or by engineering evaluation. The vessel must then be properly marked before repairs are performed.

Question 49NBIC (National Board Inspection Code)

What is the NBIC requirement for the retention of inspection records by the owner or user?

  1. Records must be kept for the life of the equipment Correct answer.
  2. Records need not be retained if the equipment is sold
  3. Records must be kept for at least one year
  4. Records must be kept for five years after the equipment is retired

Explanation

The NBIC requires that inspection records be maintained for the life of the equipment. This includes records of inspections, repairs, alterations, and tests, which provide a history of the equipment's condition and modifications.

Question 50NBIC (National Board Inspection Code)

An inspector is reviewing a repair organization's quality control manual and finds that it does not include provisions for the calibration of measuring and test equipment. What is the most appropriate action?

  1. Require the manual to be revised to include calibration requirements before accepting the repair organization Correct answer.
  2. Perform the calibration personally
  3. Ignore the omission if the organization has a good reputation
  4. Accept the manual because calibration is not important

Explanation

A quality control manual must include provisions for the calibration of measuring and test equipment to ensure accurate measurements during repairs. The inspector should require the manual to be revised to address this omission before accepting the repair organization.