WFMS Vol 4 questions with complete
solutions
Wet pipe - correct answer ✔✔What type of fire suppression system has closed heads, is full of water,
and is under pressure at all times?
One or more heads opening - correct answer ✔✔In a wet-pipe sprinkler system, what causes the clapper
valve to open?
Replace damaged heads - correct answer ✔✔What is the first step in restoring a wet-pipe sprinkler
system?
Using the inspector's test valve - correct answer ✔✔When restoring a wet-pipe sprinkler system, any
trapped air can be bled off by
Relieve trapped air pressure - correct answer ✔✔What should you do if false alarms are being caused by
pressure surges?
Accelerators and exhausters - correct answer ✔✔What are the two types of quick-opening devices in a
large dry-pipe system?
30 minutes - correct answer ✔✔How long should it take to recharge a dry-pipe system during
restoration?
Temperature - correct answer ✔✔When inspecting a dry pipe sprinkler system, record and compare to
previous readings the air and water pressures and
Increase air pressure - correct answer ✔✔How do you correct occasional trips in dry-pipe systems
caused by water surges?
solutions
Wet pipe - correct answer ✔✔What type of fire suppression system has closed heads, is full of water,
and is under pressure at all times?
One or more heads opening - correct answer ✔✔In a wet-pipe sprinkler system, what causes the clapper
valve to open?
Replace damaged heads - correct answer ✔✔What is the first step in restoring a wet-pipe sprinkler
system?
Using the inspector's test valve - correct answer ✔✔When restoring a wet-pipe sprinkler system, any
trapped air can be bled off by
Relieve trapped air pressure - correct answer ✔✔What should you do if false alarms are being caused by
pressure surges?
Accelerators and exhausters - correct answer ✔✔What are the two types of quick-opening devices in a
large dry-pipe system?
30 minutes - correct answer ✔✔How long should it take to recharge a dry-pipe system during
restoration?
Temperature - correct answer ✔✔When inspecting a dry pipe sprinkler system, record and compare to
previous readings the air and water pressures and
Increase air pressure - correct answer ✔✔How do you correct occasional trips in dry-pipe systems
caused by water surges?
