NCCER BOILERMAKER 2026/2027 |100% VERIFIED EXAM QUESTIONS AND
DETAILED VERIFIED ANSWERS | LATEST NCCER CURRICULUM | PASS
GUARANTEE
1. What is the primary purpose of a Job Hazard Analysis (JHA)?
A. To schedule work shifts
B. To identify and control hazards before work begins
C. To assign blame after an accident
D. To determine overtime pay
ANSWER : B — A JHA identifies potential hazards for each job step and
determines control measures before work begins.
2. Which colour indicates a danger signal word on a safety label?
A. Orange
B. Yellow
C. Red
D. Blue
ANSWER : C — Red is used for DANGER, indicating an immediately hazardous
situation that could cause death or serious injury.
3. What does OSHA stand for?
A. Occupational Safety and Health Administration
B. Office of Safety and Hazard Awareness
C. Operational Standards for Hazardous Areas
D. Occupational Standards and Health Authority
ANSWER : A — OSHA stands for Occupational Safety and Health Administration,
the federal agency responsible for workplace safety regulations.
4. A Safety Data Sheet (SDS) must contain how many sections according to OSHA's
Hazard Communication Standard?
A. 8
B. 12
C. 16
, D. 20
ANSWER : C — OSHA's HazCom Standard requires all SDSs to follow a
standardised 16-section format.
5. When must a worker immediately report a near-miss incident?
A. At the end of the shift
B. Within 24 hours
C. As soon as safely possible
D. Only if injury occurred
ANSWER : C — Near-miss incidents should be reported as soon as safely possible
to prevent future accidents.
6. What is the minimum distance workers must stay from energized overhead power
lines rated at 50kV or below?
A. 5 feet
B. 10 feet
C. 15 feet
D. 20 feet
ANSWER : B — OSHA requires a minimum clearance of 10 feet from overhead
power lines rated at 50kV or below.
7. Which type of fire extinguisher is safe to use on electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
ANSWER : C — Class C fire extinguishers are designed for electrical fires and use
non-conductive agents.
8. What does the acronym PPE stand for?
A. Personal Protective Equipment
B. Plant Protection Evaluation
C. Pressure Protection Engineering
D. Process Plant Examination
ANSWER : A — PPE stands for Personal Protective Equipment — gear worn to
minimise exposure to workplace hazards.
,9. A confined space that contains or has the potential to contain a serious
atmospheric hazard is classified as:
A. A permit-required confined space
B. A standard confined space
C. A restricted entry space
D. A controlled access area
ANSWER : A — OSHA defines a permit-required confined space as one with the
potential to contain hazardous atmospheres, engulfment hazards, or other serious
hazards.
10. The lower explosive limit (LEL) for most flammable gases is:
A. The minimum concentration at which combustion can occur
B. The maximum concentration at which combustion can occur
C. The concentration at which a gas becomes toxic
D. The pressure at which a gas ignites
ANSWER : A — The LEL is the lowest concentration of a flammable gas in air that
can ignite if an ignition source is present.
11. Which hand tool is used to cut external threads on pipe or bolts?
A. Tap
B. Die
C. Reamer
D. Broach
ANSWER : B — A die is used to cut or form external (male) threads on a rod, pipe,
or bolt.
12. What is the correct procedure when a grinding wheel becomes glazed?
A. Apply water to the wheel
B. Dress the wheel with a wheel dresser
C. Increase the spindle speed
D. Replace the wheel immediately
ANSWER : B — A glazed grinding wheel should be dressed using a wheel dresser
to restore the cutting surface.
13. Which type of file cut has teeth arranged in a single row of parallel, diagonal
lines?
A. Double cut
B. Rasp cut
, C. Single cut
D. Curved cut
ANSWER : C — A single-cut file has teeth arranged in one set of parallel diagonal
rows, used for finishing and drawfiling.
14. What is the purpose of a chain fall (chain hoist)?
A. To measure chain lengths
B. To lift or lower heavy loads using mechanical advantage
C. To cut chain to length
D. To weld chain links together
ANSWER : B — A chain fall uses a system of pulleys and chain to provide
mechanical advantage for lifting or lowering heavy loads.
15. Before using a come-along (lever hoist), a boilermaker should inspect:
A. Only the chain for visible damage
B. Only the hook latches
C. The chain, hooks, latches, and ratchet mechanism for damage or wear
D. Only the load capacity label
ANSWER : C — A complete pre-use inspection includes checking chain condition,
hook latches, ratchet mechanism, and load capacity rating.
16. Which measurement tool is used to check the inside diameter of a bore?
A. Outside micrometer
B. Inside micrometer
C. Vernier caliper only
D. Steel rule
ANSWER : B — An inside micrometer is specifically designed to measure the
internal dimensions of a bore, hole, or sleeve.
17. What does TIR stand for in precision measurement?
A. Total Indicated Runout
B. Tool Inspection Record
C. Thread Inspection Reference
D. Torque Indicator Reading
ANSWER : A — TIR stands for Total Indicated Runout — the total variation
measured by a dial indicator as a part rotates.
DETAILED VERIFIED ANSWERS | LATEST NCCER CURRICULUM | PASS
GUARANTEE
1. What is the primary purpose of a Job Hazard Analysis (JHA)?
A. To schedule work shifts
B. To identify and control hazards before work begins
C. To assign blame after an accident
D. To determine overtime pay
ANSWER : B — A JHA identifies potential hazards for each job step and
determines control measures before work begins.
2. Which colour indicates a danger signal word on a safety label?
A. Orange
B. Yellow
C. Red
D. Blue
ANSWER : C — Red is used for DANGER, indicating an immediately hazardous
situation that could cause death or serious injury.
3. What does OSHA stand for?
A. Occupational Safety and Health Administration
B. Office of Safety and Hazard Awareness
C. Operational Standards for Hazardous Areas
D. Occupational Standards and Health Authority
ANSWER : A — OSHA stands for Occupational Safety and Health Administration,
the federal agency responsible for workplace safety regulations.
4. A Safety Data Sheet (SDS) must contain how many sections according to OSHA's
Hazard Communication Standard?
A. 8
B. 12
C. 16
, D. 20
ANSWER : C — OSHA's HazCom Standard requires all SDSs to follow a
standardised 16-section format.
5. When must a worker immediately report a near-miss incident?
A. At the end of the shift
B. Within 24 hours
C. As soon as safely possible
D. Only if injury occurred
ANSWER : C — Near-miss incidents should be reported as soon as safely possible
to prevent future accidents.
6. What is the minimum distance workers must stay from energized overhead power
lines rated at 50kV or below?
A. 5 feet
B. 10 feet
C. 15 feet
D. 20 feet
ANSWER : B — OSHA requires a minimum clearance of 10 feet from overhead
power lines rated at 50kV or below.
7. Which type of fire extinguisher is safe to use on electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
ANSWER : C — Class C fire extinguishers are designed for electrical fires and use
non-conductive agents.
8. What does the acronym PPE stand for?
A. Personal Protective Equipment
B. Plant Protection Evaluation
C. Pressure Protection Engineering
D. Process Plant Examination
ANSWER : A — PPE stands for Personal Protective Equipment — gear worn to
minimise exposure to workplace hazards.
,9. A confined space that contains or has the potential to contain a serious
atmospheric hazard is classified as:
A. A permit-required confined space
B. A standard confined space
C. A restricted entry space
D. A controlled access area
ANSWER : A — OSHA defines a permit-required confined space as one with the
potential to contain hazardous atmospheres, engulfment hazards, or other serious
hazards.
10. The lower explosive limit (LEL) for most flammable gases is:
A. The minimum concentration at which combustion can occur
B. The maximum concentration at which combustion can occur
C. The concentration at which a gas becomes toxic
D. The pressure at which a gas ignites
ANSWER : A — The LEL is the lowest concentration of a flammable gas in air that
can ignite if an ignition source is present.
11. Which hand tool is used to cut external threads on pipe or bolts?
A. Tap
B. Die
C. Reamer
D. Broach
ANSWER : B — A die is used to cut or form external (male) threads on a rod, pipe,
or bolt.
12. What is the correct procedure when a grinding wheel becomes glazed?
A. Apply water to the wheel
B. Dress the wheel with a wheel dresser
C. Increase the spindle speed
D. Replace the wheel immediately
ANSWER : B — A glazed grinding wheel should be dressed using a wheel dresser
to restore the cutting surface.
13. Which type of file cut has teeth arranged in a single row of parallel, diagonal
lines?
A. Double cut
B. Rasp cut
, C. Single cut
D. Curved cut
ANSWER : C — A single-cut file has teeth arranged in one set of parallel diagonal
rows, used for finishing and drawfiling.
14. What is the purpose of a chain fall (chain hoist)?
A. To measure chain lengths
B. To lift or lower heavy loads using mechanical advantage
C. To cut chain to length
D. To weld chain links together
ANSWER : B — A chain fall uses a system of pulleys and chain to provide
mechanical advantage for lifting or lowering heavy loads.
15. Before using a come-along (lever hoist), a boilermaker should inspect:
A. Only the chain for visible damage
B. Only the hook latches
C. The chain, hooks, latches, and ratchet mechanism for damage or wear
D. Only the load capacity label
ANSWER : C — A complete pre-use inspection includes checking chain condition,
hook latches, ratchet mechanism, and load capacity rating.
16. Which measurement tool is used to check the inside diameter of a bore?
A. Outside micrometer
B. Inside micrometer
C. Vernier caliper only
D. Steel rule
ANSWER : B — An inside micrometer is specifically designed to measure the
internal dimensions of a bore, hole, or sleeve.
17. What does TIR stand for in precision measurement?
A. Total Indicated Runout
B. Tool Inspection Record
C. Thread Inspection Reference
D. Torque Indicator Reading
ANSWER : A — TIR stands for Total Indicated Runout — the total variation
measured by a dial indicator as a part rotates.
