S12 sprinkler test, S13 standpipe test, Sprinklers
segment 5, S-12 CITYWIDE SPRINKLER SYSTEMS
EXAM WITH COMPLETE SOLUTIONS 100% VERIFIED
NEW UPDATE
Response Time Index (RTI) - ANSWER -A measurement of the thermal
sensitivity of a sprinkler head expressed in (meters-seconds) 1/2.
Supervisory signal - ANSWER -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 - ANSWER -A sprinkler head with and orifice size
smaller than 1⁄2"
Solder Link Sprinkler - ANSWER -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 - ANSWER -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 - ANSWER -A sprinkler having a fusible link
with a response time index (RTI) of 80 or more.
Supervisory signal-initiating device - ANSWER -An initiating device, such as a
valve supervisory switch,that triggers a supervisory signal.
Testing - ANSWER -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 - ANSWER -A sprinkler designed to be installed in such a way
that the water spray is directed upwards against the deflector.
Water Spray Fixed System - ANSWER -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.
PREACTION SPRINKLER SYSTEMS - ANSWER -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 - ANSWER -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 - ANSWER -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.
Curb Valves - ANSWER -Gate valves of the non-indicating type are provided in
water distribution systems. Gate valves allow the sprinkler system to be shut off
for repairs or maintenance. Such valves are normally a non-rising stem type. They
are operated using a special key wrench. A valve box is located over the valve to
keep dirt from the valve. The valve box also provides a convenient access point for
the valve wrench to the valve nut. A complete record should be made for each
valve in the system. This record should include the exact location, the date it was
installed, the make, the direction of opening, number of turns to open, and any
maintenance that was performed.
The control valve for the building may also be on the outside wall or attached to an
upright post, known as a post indicator valve (PIV). The building or section of the
building controlled by the valve is usually marked on the post. The position of this
valve (open or closed) is shown through a telltale opening in the post. On some
posts, a padlock must first be opened to release the operating wrench or wheel
handle.
Pumper Connections for Fire Department Use - ANSWER -Fire Department
connections must always be accessible. Each connection shall be fitted with a
lower check valve. The lower check valve prevents the backflow of the private
water supply into the Fire Department connection. The figure below shows the
main features of a Fire Department connection.
Fire Pumps - ANSWER -used as a main water supply source for sprinkler
systems. They may also be used in combination with gravity tanks to supply
sprinkler system. Fire pumps are designed to take the water from a supply source
and then discharge the water into the fire protection system under pressure.
Waterflow Alarm Valves - ANSWER -The basic design of most water-flow alarm
valves is that of a check valve which lifts from its seat when water flows into a
sprinkler system. This alarm then starts an audible signal to alert the occupants in
the building that the sprinkler system has been activated.
Vane type waterflow - ANSWER -Switches have a paddle inserted inside the
main supply piping perpendicular to the direction of flow. Upon waterflow, the
paddle switch transmits an alarm. Vane type waterflow switches cannot be
installed to monitor waterflow in dry pipe sprinkler systems.
, Alarm Retarding Devices - ANSWER -An alarm check valve that is exposed to
changing water supply pressure needs an alarm retarding device. This is required to
prevent false alarms when the check valve clapper is lifted from its seat by a
temporary pressure surge. Vane type water flow switches sensitivity can also be
adjusted to changing water pressures.
The Centrifugal Pump - ANSWER -The centrifugal fire pump is the standard
pump currently used in fire protection systems. This is the preferred pump because
it is reliable, compact, requires low maintenance, and it can be powered by a
variety of drivers including: electric motors, internal combustion engines, and
steam turbines
The Vertical Turbine Pump - ANSWER -A vertical turbine pump is really a
modified centrifugal pump that has the capability to draw water from streams,
ponds, wells etc. Unlike the standard centrifugal pump, the vertical turbine pump
does not need the suction supply to be under pressure for it to operate. Instead it
draws the water into the pump by suction. The water is drawn into the pump. When
it reaches the rotating impellers the water pressure is increased and then forcefully
discharged into the fire protection system.
Pump Activation - ANSWER -A fire pump can be started automatically or
manually. The pump can be started automatically by an electric controller or an
engine controller. These controllers activate the pump when there is a drop of
water pressure or water flow in the fire protection system.
Pressure Maintenance Pumps (Jockey Pumps) - ANSWER -Pressure maintenance
pumps,
Some times referred to as jockey, or makeup pumps, are often found on sprinkler
systems. These pumps are designed to automatically operate when there is a slight
drop in pressure due to the leakage in the system or a pressure surge. The jockey
pump restores the pressure in the fire protection system to the desired level. When
the drop of pressure in the system greater than the capacity of the jockey pump the
fire pump is activated.
Booster pumps/special service pumps - ANSWER -Booster pumps are sometimes
used in sprinkler systems. They small pumps with limited power are usually
located in the basement or taking suction from gravity tanks. The booster pump is
used when the water pressure available at the highest sprinkler head does not quite
meet the needs of the sprinkler system. This small pump increases the water
segment 5, S-12 CITYWIDE SPRINKLER SYSTEMS
EXAM WITH COMPLETE SOLUTIONS 100% VERIFIED
NEW UPDATE
Response Time Index (RTI) - ANSWER -A measurement of the thermal
sensitivity of a sprinkler head expressed in (meters-seconds) 1/2.
Supervisory signal - ANSWER -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 - ANSWER -A sprinkler head with and orifice size
smaller than 1⁄2"
Solder Link Sprinkler - ANSWER -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 - ANSWER -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 - ANSWER -A sprinkler having a fusible link
with a response time index (RTI) of 80 or more.
Supervisory signal-initiating device - ANSWER -An initiating device, such as a
valve supervisory switch,that triggers a supervisory signal.
Testing - ANSWER -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 - ANSWER -A sprinkler designed to be installed in such a way
that the water spray is directed upwards against the deflector.
Water Spray Fixed System - ANSWER -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.
PREACTION SPRINKLER SYSTEMS - ANSWER -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 - ANSWER -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 - ANSWER -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.
Curb Valves - ANSWER -Gate valves of the non-indicating type are provided in
water distribution systems. Gate valves allow the sprinkler system to be shut off
for repairs or maintenance. Such valves are normally a non-rising stem type. They
are operated using a special key wrench. A valve box is located over the valve to
keep dirt from the valve. The valve box also provides a convenient access point for
the valve wrench to the valve nut. A complete record should be made for each
valve in the system. This record should include the exact location, the date it was
installed, the make, the direction of opening, number of turns to open, and any
maintenance that was performed.
The control valve for the building may also be on the outside wall or attached to an
upright post, known as a post indicator valve (PIV). The building or section of the
building controlled by the valve is usually marked on the post. The position of this
valve (open or closed) is shown through a telltale opening in the post. On some
posts, a padlock must first be opened to release the operating wrench or wheel
handle.
Pumper Connections for Fire Department Use - ANSWER -Fire Department
connections must always be accessible. Each connection shall be fitted with a
lower check valve. The lower check valve prevents the backflow of the private
water supply into the Fire Department connection. The figure below shows the
main features of a Fire Department connection.
Fire Pumps - ANSWER -used as a main water supply source for sprinkler
systems. They may also be used in combination with gravity tanks to supply
sprinkler system. Fire pumps are designed to take the water from a supply source
and then discharge the water into the fire protection system under pressure.
Waterflow Alarm Valves - ANSWER -The basic design of most water-flow alarm
valves is that of a check valve which lifts from its seat when water flows into a
sprinkler system. This alarm then starts an audible signal to alert the occupants in
the building that the sprinkler system has been activated.
Vane type waterflow - ANSWER -Switches have a paddle inserted inside the
main supply piping perpendicular to the direction of flow. Upon waterflow, the
paddle switch transmits an alarm. Vane type waterflow switches cannot be
installed to monitor waterflow in dry pipe sprinkler systems.
, Alarm Retarding Devices - ANSWER -An alarm check valve that is exposed to
changing water supply pressure needs an alarm retarding device. This is required to
prevent false alarms when the check valve clapper is lifted from its seat by a
temporary pressure surge. Vane type water flow switches sensitivity can also be
adjusted to changing water pressures.
The Centrifugal Pump - ANSWER -The centrifugal fire pump is the standard
pump currently used in fire protection systems. This is the preferred pump because
it is reliable, compact, requires low maintenance, and it can be powered by a
variety of drivers including: electric motors, internal combustion engines, and
steam turbines
The Vertical Turbine Pump - ANSWER -A vertical turbine pump is really a
modified centrifugal pump that has the capability to draw water from streams,
ponds, wells etc. Unlike the standard centrifugal pump, the vertical turbine pump
does not need the suction supply to be under pressure for it to operate. Instead it
draws the water into the pump by suction. The water is drawn into the pump. When
it reaches the rotating impellers the water pressure is increased and then forcefully
discharged into the fire protection system.
Pump Activation - ANSWER -A fire pump can be started automatically or
manually. The pump can be started automatically by an electric controller or an
engine controller. These controllers activate the pump when there is a drop of
water pressure or water flow in the fire protection system.
Pressure Maintenance Pumps (Jockey Pumps) - ANSWER -Pressure maintenance
pumps,
Some times referred to as jockey, or makeup pumps, are often found on sprinkler
systems. These pumps are designed to automatically operate when there is a slight
drop in pressure due to the leakage in the system or a pressure surge. The jockey
pump restores the pressure in the fire protection system to the desired level. When
the drop of pressure in the system greater than the capacity of the jockey pump the
fire pump is activated.
Booster pumps/special service pumps - ANSWER -Booster pumps are sometimes
used in sprinkler systems. They small pumps with limited power are usually
located in the basement or taking suction from gravity tanks. The booster pump is
used when the water pressure available at the highest sprinkler head does not quite
meet the needs of the sprinkler system. This small pump increases the water
