NC Fire Sprinkler Contractor Examination (Board-
Administered Classification Exam Under PHPFSC)
Questions and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant Download Pdf
1. What is the primary purpose of an automatic sprinkler system?
A. To eliminate all fire hazards
B. To provide emergency lighting
C. To control or suppress a fire until additional firefighting measures
can be taken
D. To replace the fire alarm system
Rationale: Automatic sprinklers are intended primarily to control or
suppress developing fires. They are an important component of fire
protection but do not eliminate the need for other fire protection
measures, including alarms and emergency response.
2. Which component normally detects the heat of a fire and initiates
water discharge from an individual sprinkler?
,A. Fire pump
B. Alarm check valve
C. Sprinkler operating element
D. Main drain
Rationale: Each automatic sprinkler has a heat-responsive operating
element. When the element reaches its rated operating temperature, it
releases the sprinkler and permits water to discharge.
3. In a wet-pipe sprinkler system, the piping is normally filled with:
A. Compressed air only
B. Nitrogen only
C. Water under pressure
D. Carbon dioxide
Rationale: Wet-pipe systems contain water throughout the distribution
piping under normal conditions. When a sprinkler operates, pressurized
water immediately flows through that sprinkler.
4. Which sprinkler system is generally used where piping may be
exposed to freezing temperatures?
A. Wet-pipe system
B. Dry-pipe system
,C. Deluge system only
D. Standpipe system
Rationale: Dry-pipe systems normally contain pressurized air or nitrogen
in the piping, with water held back by a dry-pipe valve. This
arrangement helps prevent water from freezing in portions of the
system exposed to low temperatures.
5. What is the primary function of a dry-pipe valve?
A. Increase electrical voltage
B. Reduce sprinkler temperature
C. Hold back water until the system piping pressure conditions permit
the valve to trip
D. Drain the building's domestic water supply
Rationale: A dry-pipe valve separates the water supply from the
normally air-filled sprinkler piping. When a sprinkler operates and
system pressure changes sufficiently, the valve trips and admits water
into the system.
6. Which system normally has open sprinklers or open nozzles
throughout the protected area?
A. Wet-pipe system
B. Dry-pipe system
, C. Preaction system
D. Deluge system
Rationale: Deluge systems use open sprinklers or nozzles. Once the
deluge valve operates, water flows through all open outlets
simultaneously, making these systems appropriate for high-hazard
applications requiring rapid water application.
7. What is a principal characteristic of a preaction sprinkler system?
A. It always contains water at atmospheric pressure
B. Water admission is controlled by a detection or supervisory
arrangement before water enters the sprinkler piping
C. All sprinklers discharge simultaneously
D. It cannot use automatic sprinklers
Rationale: Preaction systems use additional detection or control
arrangements to permit water into the sprinkler piping. This can reduce
the likelihood of accidental water discharge in areas where unwanted
water release could cause significant damage.
8. What does the K-factor of a sprinkler primarily relate to?
A. Electrical resistance
B. Pipe length
Administered Classification Exam Under PHPFSC)
Questions and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant Download Pdf
1. What is the primary purpose of an automatic sprinkler system?
A. To eliminate all fire hazards
B. To provide emergency lighting
C. To control or suppress a fire until additional firefighting measures
can be taken
D. To replace the fire alarm system
Rationale: Automatic sprinklers are intended primarily to control or
suppress developing fires. They are an important component of fire
protection but do not eliminate the need for other fire protection
measures, including alarms and emergency response.
2. Which component normally detects the heat of a fire and initiates
water discharge from an individual sprinkler?
,A. Fire pump
B. Alarm check valve
C. Sprinkler operating element
D. Main drain
Rationale: Each automatic sprinkler has a heat-responsive operating
element. When the element reaches its rated operating temperature, it
releases the sprinkler and permits water to discharge.
3. In a wet-pipe sprinkler system, the piping is normally filled with:
A. Compressed air only
B. Nitrogen only
C. Water under pressure
D. Carbon dioxide
Rationale: Wet-pipe systems contain water throughout the distribution
piping under normal conditions. When a sprinkler operates, pressurized
water immediately flows through that sprinkler.
4. Which sprinkler system is generally used where piping may be
exposed to freezing temperatures?
A. Wet-pipe system
B. Dry-pipe system
,C. Deluge system only
D. Standpipe system
Rationale: Dry-pipe systems normally contain pressurized air or nitrogen
in the piping, with water held back by a dry-pipe valve. This
arrangement helps prevent water from freezing in portions of the
system exposed to low temperatures.
5. What is the primary function of a dry-pipe valve?
A. Increase electrical voltage
B. Reduce sprinkler temperature
C. Hold back water until the system piping pressure conditions permit
the valve to trip
D. Drain the building's domestic water supply
Rationale: A dry-pipe valve separates the water supply from the
normally air-filled sprinkler piping. When a sprinkler operates and
system pressure changes sufficiently, the valve trips and admits water
into the system.
6. Which system normally has open sprinklers or open nozzles
throughout the protected area?
A. Wet-pipe system
B. Dry-pipe system
, C. Preaction system
D. Deluge system
Rationale: Deluge systems use open sprinklers or nozzles. Once the
deluge valve operates, water flows through all open outlets
simultaneously, making these systems appropriate for high-hazard
applications requiring rapid water application.
7. What is a principal characteristic of a preaction sprinkler system?
A. It always contains water at atmospheric pressure
B. Water admission is controlled by a detection or supervisory
arrangement before water enters the sprinkler piping
C. All sprinklers discharge simultaneously
D. It cannot use automatic sprinklers
Rationale: Preaction systems use additional detection or control
arrangements to permit water into the sprinkler piping. This can reduce
the likelihood of accidental water discharge in areas where unwanted
water release could cause significant damage.
8. What does the K-factor of a sprinkler primarily relate to?
A. Electrical resistance
B. Pipe length
