National Board Inservice Inspector (NB IS)
Certification Exam – Practice Test
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. The primary purpose of the National Board Inservice Inspector
certification is to verify competency in:
A. Boiler operation
B. Pressure vessel design
C. Inspection of boilers and pressure-retaining items
D. Welding fabrication
Answer: C
The NB IS credential focuses on inspection knowledge, not operation or
design.
2. An inservice inspector’s main responsibility is to ensure
equipment complies with:
A. Manufacturer instructions only
B. Owner maintenance programs
C. Jurisdictional laws and codes
D. Insurance company preferences
,Answer: C
Jurisdictional requirements govern legal compliance.
3. Which organization publishes the NBIC?
A. ASME
B. OSHA
C. National Board of Boiler and Pressure Vessel Inspectors
D. API
Answer: C
The National Board publishes and maintains the NBIC.
4. The NBIC primarily applies to:
A. New construction only
B. Repairs and alterations
C. Inservice inspection and repairs
D. Welding procedures only
Answer: C
NBIC governs inservice inspection, repairs, and alterations.
5. Which ASME code section governs boiler and pressure vessel
construction?
A. Section V
B. Section VIII
C. Section IX
D. Section I and VIII
,Answer: D
Section I covers boilers; Section VIII covers pressure vessels.
6. A pressure relief valve is designed to:
A. Control operating pressure
B. Prevent corrosion
C. Protect against overpressure
D. Regulate temperature
Answer: C
Its purpose is to prevent pressure exceeding safe limits.
7. Accumulation refers to:
A. Total operating pressure
B. Increase above MAWP during discharge
C. Set pressure of a valve
D. Test pressure
Answer: B
Accumulation is pressure increase above MAWP during relief.
8. MAWP stands for:
A. Maximum Allowable Working Pressure
B. Minimum Allowable Weld Pressure
C. Maximum Authorized Water Pressure
D. Measured Allowable Working Pressure
, Answer: A
MAWP is the maximum safe operating pressure.
9. The inspector must verify that nameplates are:
A. Painted over
B. Optional
C. Legible and attached
D. Removed after installation
Answer: C
Legible nameplates are required for identification.
10. Which document authorizes repairs or alterations?
A. Manufacturer’s data report
B. R-Stamp form
C. Owner maintenance log
D. Hydrostatic certificate
Answer: B
R-Forms document National Board repairs and alterations.
11. An R-Stamp indicates authorization to:
A. Build new boilers
B. Inspect pressure vessels
C. Perform repairs and alterations
D. Operate pressure equipment
Certification Exam – Practice Test
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. The primary purpose of the National Board Inservice Inspector
certification is to verify competency in:
A. Boiler operation
B. Pressure vessel design
C. Inspection of boilers and pressure-retaining items
D. Welding fabrication
Answer: C
The NB IS credential focuses on inspection knowledge, not operation or
design.
2. An inservice inspector’s main responsibility is to ensure
equipment complies with:
A. Manufacturer instructions only
B. Owner maintenance programs
C. Jurisdictional laws and codes
D. Insurance company preferences
,Answer: C
Jurisdictional requirements govern legal compliance.
3. Which organization publishes the NBIC?
A. ASME
B. OSHA
C. National Board of Boiler and Pressure Vessel Inspectors
D. API
Answer: C
The National Board publishes and maintains the NBIC.
4. The NBIC primarily applies to:
A. New construction only
B. Repairs and alterations
C. Inservice inspection and repairs
D. Welding procedures only
Answer: C
NBIC governs inservice inspection, repairs, and alterations.
5. Which ASME code section governs boiler and pressure vessel
construction?
A. Section V
B. Section VIII
C. Section IX
D. Section I and VIII
,Answer: D
Section I covers boilers; Section VIII covers pressure vessels.
6. A pressure relief valve is designed to:
A. Control operating pressure
B. Prevent corrosion
C. Protect against overpressure
D. Regulate temperature
Answer: C
Its purpose is to prevent pressure exceeding safe limits.
7. Accumulation refers to:
A. Total operating pressure
B. Increase above MAWP during discharge
C. Set pressure of a valve
D. Test pressure
Answer: B
Accumulation is pressure increase above MAWP during relief.
8. MAWP stands for:
A. Maximum Allowable Working Pressure
B. Minimum Allowable Weld Pressure
C. Maximum Authorized Water Pressure
D. Measured Allowable Working Pressure
, Answer: A
MAWP is the maximum safe operating pressure.
9. The inspector must verify that nameplates are:
A. Painted over
B. Optional
C. Legible and attached
D. Removed after installation
Answer: C
Legible nameplates are required for identification.
10. Which document authorizes repairs or alterations?
A. Manufacturer’s data report
B. R-Stamp form
C. Owner maintenance log
D. Hydrostatic certificate
Answer: B
R-Forms document National Board repairs and alterations.
11. An R-Stamp indicates authorization to:
A. Build new boilers
B. Inspect pressure vessels
C. Perform repairs and alterations
D. Operate pressure equipment
