FDNY S12 COMPREHENSIVE STUDY GUIDE
COMPLETE QUESTIONS AND ANSWERS
WITH VERIFIED DETAILED SOLUTIONS
⩥ What is a Wet Pipe Sprinkler System?
Answer: A sprinkler system with automatic sprinklers attached to a
piping system containing water for immediate discharge.
⩥ What is a Water Spray Fixed System?
Answer: A fixed pipe system connected to a water supply, equipped with
nozzles for specific water discharge and distribution.
⩥ What is a Water Tank in fire protection?
Answer: A tank supplying water for water-based fire protection systems.
⩥ What is the purpose of Automatic Wet Sprinkler Systems?
Answer: To automatically distribute water on a fire to extinguish it or
prevent its spread.
⩥ How effective are automatic sprinklers in controlling fires?
Answer: About 96% of fires are extinguished or controlled when
sprinklers are installed.
,⩥ What is the primary purpose of notifying the local fire house when
water discharge or equipment problems are identified?
Answer: To allow the Fire Department to gain control of a fire as
quickly as possible.
⩥ What type of sprinkler system has water in the piping at all times?
Answer: Wet pipe systems.
⩥ What is the minimum temperature required to prevent a wet pipe
system from freezing?
Answer: 40°F.
⩥ What are the two methods for using automatic sprinklers in freezing
temperatures?
Answer: Dry pipe systems and antifreeze solutions.
⩥ What is the function of antifreeze solutions in sprinkler systems?
Answer: To prevent water from freezing in piping exposed to freezing
temperatures.
⩥ What must be obtained before shutting down parts of an automatic
sprinkler system?
Answer: Permission from the local fire house.
, ⩥ What are cold weather valves?
Answer: Valves that allow shutting off a maximum of 10 sprinkler heads
on a wet pipe system.
⩥ What is the main characteristic of dry pipe sprinkler systems?
Answer: There is no water in the piping under normal conditions; it is
filled with air or nitrogen under pressure.
⩥ What triggers the flow of water in a dry pipe sprinkler system?
Answer: A drop in air pressure caused by an opened sprinkler head.
⩥ What is the purpose of a supervisory device in a dry pipe system?
Answer: To signal when the dry pipe valve opens.
⩥ What is water hammer in the context of dry pipe systems?
Answer: A sudden flow of water or change in water pressure that may
accidentally trip the dry valve.
⩥ What are quick opening devices in dry pipe systems?
Answer: Devices that reduce the delay between the opening of a
sprinkler and the discharge of water.
⩥ What is the function of an accelerator in a dry pipe system?
COMPLETE QUESTIONS AND ANSWERS
WITH VERIFIED DETAILED SOLUTIONS
⩥ What is a Wet Pipe Sprinkler System?
Answer: A sprinkler system with automatic sprinklers attached to a
piping system containing water for immediate discharge.
⩥ What is a Water Spray Fixed System?
Answer: A fixed pipe system connected to a water supply, equipped with
nozzles for specific water discharge and distribution.
⩥ What is a Water Tank in fire protection?
Answer: A tank supplying water for water-based fire protection systems.
⩥ What is the purpose of Automatic Wet Sprinkler Systems?
Answer: To automatically distribute water on a fire to extinguish it or
prevent its spread.
⩥ How effective are automatic sprinklers in controlling fires?
Answer: About 96% of fires are extinguished or controlled when
sprinklers are installed.
,⩥ What is the primary purpose of notifying the local fire house when
water discharge or equipment problems are identified?
Answer: To allow the Fire Department to gain control of a fire as
quickly as possible.
⩥ What type of sprinkler system has water in the piping at all times?
Answer: Wet pipe systems.
⩥ What is the minimum temperature required to prevent a wet pipe
system from freezing?
Answer: 40°F.
⩥ What are the two methods for using automatic sprinklers in freezing
temperatures?
Answer: Dry pipe systems and antifreeze solutions.
⩥ What is the function of antifreeze solutions in sprinkler systems?
Answer: To prevent water from freezing in piping exposed to freezing
temperatures.
⩥ What must be obtained before shutting down parts of an automatic
sprinkler system?
Answer: Permission from the local fire house.
, ⩥ What are cold weather valves?
Answer: Valves that allow shutting off a maximum of 10 sprinkler heads
on a wet pipe system.
⩥ What is the main characteristic of dry pipe sprinkler systems?
Answer: There is no water in the piping under normal conditions; it is
filled with air or nitrogen under pressure.
⩥ What triggers the flow of water in a dry pipe sprinkler system?
Answer: A drop in air pressure caused by an opened sprinkler head.
⩥ What is the purpose of a supervisory device in a dry pipe system?
Answer: To signal when the dry pipe valve opens.
⩥ What is water hammer in the context of dry pipe systems?
Answer: A sudden flow of water or change in water pressure that may
accidentally trip the dry valve.
⩥ What are quick opening devices in dry pipe systems?
Answer: Devices that reduce the delay between the opening of a
sprinkler and the discharge of water.
⩥ What is the function of an accelerator in a dry pipe system?
