WFSM SET A VOLUME 4 QUESTIONA
AND ANSWERS 100% CORRECT
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. - 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. - 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. - 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. - 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. - 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. - 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. - 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 - 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. - ANSWER-d. Increase air pressure.
The foam system has an advantage because of its smothering action for class
a. A fires
b. B fires.
c. C fires.
d. D fires. - ANSWER-b. B fires
In a foam system, what is mixed with the foam to control fires?
a. Air.
b. Soap.
c. Pure oxygen.
d. Carbon dioxide. - ANSWER-a. Air
The purpose of flushing the system is to prevent
a. malfunctions.
b. freezing.
c. activation.
d. corrosion. - ANSWER-d. corrosion.
The foam system is operational when it is in the
a. on position.
b. off position.
c. fire position.
d. standby position. - ANSWER-d. standby position.
Inspect carbon dioxide (CO,) systems high-pressure cylinders for condition and
securing a. weekly.
b. monthly.
c. semi-annually.
d. annually. - ANSWER-d. annually.
AND ANSWERS 100% CORRECT
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. - 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. - 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. - 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. - 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. - 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. - 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. - 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 - 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. - ANSWER-d. Increase air pressure.
The foam system has an advantage because of its smothering action for class
a. A fires
b. B fires.
c. C fires.
d. D fires. - ANSWER-b. B fires
In a foam system, what is mixed with the foam to control fires?
a. Air.
b. Soap.
c. Pure oxygen.
d. Carbon dioxide. - ANSWER-a. Air
The purpose of flushing the system is to prevent
a. malfunctions.
b. freezing.
c. activation.
d. corrosion. - ANSWER-d. corrosion.
The foam system is operational when it is in the
a. on position.
b. off position.
c. fire position.
d. standby position. - ANSWER-d. standby position.
Inspect carbon dioxide (CO,) systems high-pressure cylinders for condition and
securing a. weekly.
b. monthly.
c. semi-annually.
d. annually. - ANSWER-d. annually.
