WFSM - Set A (Volume 4) Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
What type of fire suppression system has closed heads, is full of water, and is under pressure
at all times?
a. Dry pipe.
b. Wet pipe.
c. Deluge.
d. Foam. - CORRECT ANSWER b. Wet pipe
In a wet-pipe sprinkler system, what causes the clapper valve to open?
a. One or more heads opening.
b. Manual operation of a pull station.
c. High steady inlet water pressure.
d. Malfunctioning of the water motor alarm. - CORRECT ANSWER a. One or more
heads opening
What is the first step in restoring a wet-pipe sprinkler system?
a. Notify building occupants.
b. Clean up water damage.
c. Replace damaged heads.
d. Open main control valve to fill system. - CORRECT ANSWER c. Replace damaged
heads.
When restoring a wet-pipe sprinkler system, any trapped air can be bled off by
a. using the inspector's test valve.
b. slowly opening the main water-control valve.
c. using the bleed valve on the alarm valve clapper.
,d. opening the alarm line strainer. - CORRECT ANSWER a. Using the inspector's test
valve.
What should you do if false alarms are being caused by pressure surges?
a. Relieve trapped air pressure.
b. Eliminate water pressure.
c. Add water pressure
d. Add air pressure. - CORRECT ANSWER a. Relieve trapped air pressure.
What are the two types of quick-opening devices in a large dry-pipe system?
a. Mechanical and pneumatic.
b. Releasers and accelerators.
c. Exhausters and releasers.
d. Accelerators and exhausters. - CORRECT ANSWER d. Accelerators and exhausters.
How long should it take to recharge a dry-pipe system during restoration?
a. 15 minutes.
b. 30 minutes.
c. 45 minutes
d. 1 hour. - CORRECT ANSWER b. 30 minutes.
When inspecting a dry-pipe sprinkler system, record and compare to previous readings the air
and water pressures and
a. humidity
b. temperature
c. time of day
d. time of inspection - CORRECT ANSWER b. temperature
How do you correct occasional trips in dry-pipe systems caused by water surges?
, a. Decrease water pressure.
b. Increase water pressure
c. Decrease air pressure.
d. Increase air pressure. - CORRECT ANSWER d. Increase air pressure.
What type of fire suppression system has open sprinkler heads, and the system piping is
under surrounding atmospheric pressure? a. Dry pipe.
b. Wet pipe
c. Deluge.
d. Dry chemical. - CORRECT ANSWER c. Deluge.
What are the two possible positions of the differential deluge valve?
a. On and off.
b. Open and closed.
c. Standby and fire.
d. Standby and activated. - CORRECT ANSWER c. Standby and fire.
What is used to test heat-actuated devices (HAD) in an explosive atmosphere?
a. Electric heater.
b. Open flame.
c. Hot water or hot cloth.
d. Heat gun with special shield. - CORRECT ANSWER c. Hot water or hot cloth
When a deluge fire sprinkler system is operational, the main water control valve is
a. open and the alarm valve to control devices is open.
b. closed and the alarm valve to control devices is open.
c. open and the alarm valve to control devices is closed
d. closed and the alarm valve to control devices is closed. - CORRECT ANSWER a.
open and the alarm valve to control devices is open.
UPDATED QUESTIONS AND CORRECT
ANSWERS
What type of fire suppression system has closed heads, is full of water, and is under pressure
at all times?
a. Dry pipe.
b. Wet pipe.
c. Deluge.
d. Foam. - CORRECT ANSWER b. Wet pipe
In a wet-pipe sprinkler system, what causes the clapper valve to open?
a. One or more heads opening.
b. Manual operation of a pull station.
c. High steady inlet water pressure.
d. Malfunctioning of the water motor alarm. - CORRECT ANSWER a. One or more
heads opening
What is the first step in restoring a wet-pipe sprinkler system?
a. Notify building occupants.
b. Clean up water damage.
c. Replace damaged heads.
d. Open main control valve to fill system. - CORRECT ANSWER c. Replace damaged
heads.
When restoring a wet-pipe sprinkler system, any trapped air can be bled off by
a. using the inspector's test valve.
b. slowly opening the main water-control valve.
c. using the bleed valve on the alarm valve clapper.
,d. opening the alarm line strainer. - CORRECT ANSWER a. Using the inspector's test
valve.
What should you do if false alarms are being caused by pressure surges?
a. Relieve trapped air pressure.
b. Eliminate water pressure.
c. Add water pressure
d. Add air pressure. - CORRECT ANSWER a. Relieve trapped air pressure.
What are the two types of quick-opening devices in a large dry-pipe system?
a. Mechanical and pneumatic.
b. Releasers and accelerators.
c. Exhausters and releasers.
d. Accelerators and exhausters. - CORRECT ANSWER d. Accelerators and exhausters.
How long should it take to recharge a dry-pipe system during restoration?
a. 15 minutes.
b. 30 minutes.
c. 45 minutes
d. 1 hour. - CORRECT ANSWER b. 30 minutes.
When inspecting a dry-pipe sprinkler system, record and compare to previous readings the air
and water pressures and
a. humidity
b. temperature
c. time of day
d. time of inspection - CORRECT ANSWER b. temperature
How do you correct occasional trips in dry-pipe systems caused by water surges?
, a. Decrease water pressure.
b. Increase water pressure
c. Decrease air pressure.
d. Increase air pressure. - CORRECT ANSWER d. Increase air pressure.
What type of fire suppression system has open sprinkler heads, and the system piping is
under surrounding atmospheric pressure? a. Dry pipe.
b. Wet pipe
c. Deluge.
d. Dry chemical. - CORRECT ANSWER c. Deluge.
What are the two possible positions of the differential deluge valve?
a. On and off.
b. Open and closed.
c. Standby and fire.
d. Standby and activated. - CORRECT ANSWER c. Standby and fire.
What is used to test heat-actuated devices (HAD) in an explosive atmosphere?
a. Electric heater.
b. Open flame.
c. Hot water or hot cloth.
d. Heat gun with special shield. - CORRECT ANSWER c. Hot water or hot cloth
When a deluge fire sprinkler system is operational, the main water control valve is
a. open and the alarm valve to control devices is open.
b. closed and the alarm valve to control devices is open.
c. open and the alarm valve to control devices is closed
d. closed and the alarm valve to control devices is closed. - CORRECT ANSWER a.
open and the alarm valve to control devices is open.
