S-12 Citywide Sprinkler Systems Exam | Updated S12 Test || Most
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Quick Response Sprinkler Head
A sprinkler having a fusible link with a response time index (RTI) of 50 or less.
Recessed Sprinkler
A sprinkler in which all or part of the body, other than the shank thread, is
mounted above the ceiling.
Residential Sprinkler
A type of fast response sprinkler that has been specifically tested to
enhance survivability in the room of fire origin and listed for use in
dwelling units.
Response Time Index (RTI)
A measurement of the thermal sensitivity of a sprinkler head expressed in
(meters- seconds) 1/2.
Supervisory signal
A signal indicating the need for action or the use of such device in connection
with the supervision of fire alarm systems or the maintenance features of related
systems.
,Small orifice sprinklers
A sprinkler head with and orifice size smaller than 1⁄2"
Solder Link Sprinkler
A sprinkler operated by the melting of a metal link, they vary in size and
configuration for quick response and standard response sprinklers. The smaller
the size of the link, the faster the sprinkler operates.
Spray Sprinkler
A type of sprinkler listed for its capability to provide fire control for a wide range
of fire hazards. The most commonly used sprinkler since 1953.
Standard Response Sprinkler Head
A sprinkler having a fusible link with a response time index (RTI) of 80 or more.
Supervisory signal-initiating device
An initiating device, such as a valve supervisory switch,that triggers a supervisory
signal.
Testing
A procedure used to determine the status of a system as intended by
conducting periodic physical checks on water based fire protection systems
such as waterflow tests, fire pump tests, alarm tests, and trip tests of dry pipe,
deluge, or preaction valves. These tests follow up on the original acceptance
test at intervals specified in the appropriate
chapter of NFPA #25, 2002 edition.
,Upright Sprinkler
A sprinkler designed to be installed in such a way that the water spray is
directed upwards against the deflector.
Water Spray Fixed System
A special fixed pipe system connected to a reliable fire protection water supply
and
equipped with water spray nozzles for specific water discharge and distribution
over the surface or area to be protected. The piping system is connected to the
water supply
through an automatically or manually actuated valve that initiates the flow of
water. An automatic valve is actuated by operation of automatic detection or
manual release
equipment installed in the same areas as the water spray nozzles. (In special
cases, the automatic detection system may also be located in another area.)
PREACTION SPRINKLER SYSTEMS
designed for situations where there is danger of serious water damage. Water
damage is usually caused by damaged sprinklers or broken piping. Under
normal conditions there is no water in the piping. The air in the piping may or
may not be is under pressure. A
preaction valve prevents the water from entering the system. The valve is
automatically opened when a fire detection system discovers that there is a
fire or smoke condition. The preaction valve is tripped by the fire detection
system before any of the sprinkler heads open. A supervisory device signals
when the valve is opened. The preaction valve can also be operated
manually.
, DELUGE SPRINKLER SYSTEMS
equipped with open sprinkler heads designed to wet down an entire area
involved in a fire. This system is needed when there is danger of a fire rapidly
spreading throughout the building. The deluge system will slow down the
spread of the fire. Deluge systems are suitable for hazardous occupancies. This
includes buildings in which flammable liquids or other hazardous materials
are handled or stored.
The sprinkler heads in the deluge system are open at all times. Under normal
conditions there is no water in the piping. The air in the piping is not under
pressure. A closed
control valve prevents water from flowing into the system. A fire detection device
automatically opens the control valve when a fire is identified. A supervisory
device
signals when the valve is opened. When the valve is opened water flows into the
system. The water is then discharged out all of the sprinkler heads. The water
control valve may also be opened manually.
NON-AUTOMATIC DRY SPRINKLER SYSTEMS
ll pipes are normally dry. Water is supplied when needed by pumping water
into the system through the Fire Department connection. Some of these systems
are supplied by manual operation of a water control valve and may be equipped
with sprinklers with or without fusible links.
There are several non-automatic systems: 1) Perforated pipe systems - a single
line of piping drilled at intervals for water discharge. These systems are
usually found in basements or other areas difficult to reach in fire fighting
operations. 2) Open fixed
spray nozzles for transformer vaults or other hazardous areas; 3) exterior
exposure sprinklers (or window sprinklers) use open sprinkler heads to form
an external water curtain on the walls of a building, and 4) Foam supply
systems are used for the
protection of special hazardous occupancies.
Recent Exam Actual Complete Real Exam Questions And Correct
Answers (Verified Answers) Already Graded A+ | Guaranteed
Success!! Newest 2026-2027
Quick Response Sprinkler Head
A sprinkler having a fusible link with a response time index (RTI) of 50 or less.
Recessed Sprinkler
A sprinkler in which all or part of the body, other than the shank thread, is
mounted above the ceiling.
Residential Sprinkler
A type of fast response sprinkler that has been specifically tested to
enhance survivability in the room of fire origin and listed for use in
dwelling units.
Response Time Index (RTI)
A measurement of the thermal sensitivity of a sprinkler head expressed in
(meters- seconds) 1/2.
Supervisory signal
A signal indicating the need for action or the use of such device in connection
with the supervision of fire alarm systems or the maintenance features of related
systems.
,Small orifice sprinklers
A sprinkler head with and orifice size smaller than 1⁄2"
Solder Link Sprinkler
A sprinkler operated by the melting of a metal link, they vary in size and
configuration for quick response and standard response sprinklers. The smaller
the size of the link, the faster the sprinkler operates.
Spray Sprinkler
A type of sprinkler listed for its capability to provide fire control for a wide range
of fire hazards. The most commonly used sprinkler since 1953.
Standard Response Sprinkler Head
A sprinkler having a fusible link with a response time index (RTI) of 80 or more.
Supervisory signal-initiating device
An initiating device, such as a valve supervisory switch,that triggers a supervisory
signal.
Testing
A procedure used to determine the status of a system as intended by
conducting periodic physical checks on water based fire protection systems
such as waterflow tests, fire pump tests, alarm tests, and trip tests of dry pipe,
deluge, or preaction valves. These tests follow up on the original acceptance
test at intervals specified in the appropriate
chapter of NFPA #25, 2002 edition.
,Upright Sprinkler
A sprinkler designed to be installed in such a way that the water spray is
directed upwards against the deflector.
Water Spray Fixed System
A special fixed pipe system connected to a reliable fire protection water supply
and
equipped with water spray nozzles for specific water discharge and distribution
over the surface or area to be protected. The piping system is connected to the
water supply
through an automatically or manually actuated valve that initiates the flow of
water. An automatic valve is actuated by operation of automatic detection or
manual release
equipment installed in the same areas as the water spray nozzles. (In special
cases, the automatic detection system may also be located in another area.)
PREACTION SPRINKLER SYSTEMS
designed for situations where there is danger of serious water damage. Water
damage is usually caused by damaged sprinklers or broken piping. Under
normal conditions there is no water in the piping. The air in the piping may or
may not be is under pressure. A
preaction valve prevents the water from entering the system. The valve is
automatically opened when a fire detection system discovers that there is a
fire or smoke condition. The preaction valve is tripped by the fire detection
system before any of the sprinkler heads open. A supervisory device signals
when the valve is opened. The preaction valve can also be operated
manually.
, DELUGE SPRINKLER SYSTEMS
equipped with open sprinkler heads designed to wet down an entire area
involved in a fire. This system is needed when there is danger of a fire rapidly
spreading throughout the building. The deluge system will slow down the
spread of the fire. Deluge systems are suitable for hazardous occupancies. This
includes buildings in which flammable liquids or other hazardous materials
are handled or stored.
The sprinkler heads in the deluge system are open at all times. Under normal
conditions there is no water in the piping. The air in the piping is not under
pressure. A closed
control valve prevents water from flowing into the system. A fire detection device
automatically opens the control valve when a fire is identified. A supervisory
device
signals when the valve is opened. When the valve is opened water flows into the
system. The water is then discharged out all of the sprinkler heads. The water
control valve may also be opened manually.
NON-AUTOMATIC DRY SPRINKLER SYSTEMS
ll pipes are normally dry. Water is supplied when needed by pumping water
into the system through the Fire Department connection. Some of these systems
are supplied by manual operation of a water control valve and may be equipped
with sprinklers with or without fusible links.
There are several non-automatic systems: 1) Perforated pipe systems - a single
line of piping drilled at intervals for water discharge. These systems are
usually found in basements or other areas difficult to reach in fire fighting
operations. 2) Open fixed
spray nozzles for transformer vaults or other hazardous areas; 3) exterior
exposure sprinklers (or window sprinklers) use open sprinkler heads to form
an external water curtain on the walls of a building, and 4) Foam supply
systems are used for the
protection of special hazardous occupancies.
