S12 sprinkler test |correct 100% |questions and answers

S12 sprinkler test |correct 100% |questions
and answers

Alarm Retarding Devices - ANSW -An alarm check valve that is exposed to changing water supply pressure
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needs an alarm retarding device. This is required to prevent false alarms when the check valve clapper is
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lifted from its seat by a temporary pressure surge. Vane type water flow switches sensitivity can also be
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adjusted to changing water pressures.
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blue disk - ANSW -partially out of service- on all fire department connections
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Booster pumps/special service pumps - ANSW -Booster pumps are sometimes used in sprinkler systems.
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They small pumps with limited power are usually located in the basement or taking suction from gravity
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tanks. The booster pump is used when the water pressure available at the highest sprinkler head does not
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quite meet the needs of the sprinkler system. This small pump increases the water pressure in the
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sprinkler system until it reaches acceptable levels. The booster pump should not be confused with the fire
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pump or the jockey pump.
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Curb Valves - ANSW -Gate valves of the non-indicating type are provided in water distribution systems.
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Gate valves allow the sprinkler system to be shut off for repairs or maintenance. Such valves are normally
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a non-rising stem type. They are operated using a special key wrench. A valve box is located over the valve
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to keep dirt from the valve. The valve box also provides a convenient access point for the valve wrench to
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the valve nut. A complete record should be made for each valve in the system. This record should include
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the exact location, the date it was installed, the make, the direction of opening, number of turns to open,
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and any maintenance that was performed.
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The control valve for the building may also be on the outside wall or attached to an upright post, known as
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a post indicator valve (PIV). The building or section of the building controlled by the valve is usually
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marked on the post. The position of this valve (open or closed) is shown through a telltale opening in the
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post. On some posts, a padlock must first be opened to release the operating wrench or wheel handle.
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deluge sprinkler system - ANSW -employing open sprinklers that are attached to a piping system that is
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connected to a water supply through a valve that is opened by the operation of a detection system
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installed in the same areas as the sprinklers. WHEN IT OPENS, water flows into the piping system and
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discharges from all sprinklers attached.
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DELUGE SPRINKLER SYSTEMS - ANSW -equipped with open sprinkler heads designed to wet down an
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entire area involved in a fire. This system is needed when there is danger of a fire rapidly spreading
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throughout the building. The deluge system will slow down the spread of the fire. Deluge systems are
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suitable for hazardous occupancies. This includes buildings in which flammable liquids or other hazardous
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materials are handled or stored.
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The sprinkler heads in the deluge system are open at all times. Under normal conditions there is no water
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in the piping. The air in the piping is not under pressure. A closed control valve prevents water from
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flowing into the system. A fire detection device automatically opens the control valve when a fire is
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, identified. A supervisory device signals when the valve is opened. When the valve is opened water flows
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into the system. The water is then discharged out all of the sprinkler heads. The water control valve may
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also be opened manually.
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deluge valve - ANSW -water supply control valve intended to be operated by actuation of an automatic
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detection system that is installed in the same area as the discharge devices. INTENDED USE IS MANUAL
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AND AUTO
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Early suppresion fast response sprinklers - ANSW -fast response sprinkler that is listed for its capability to
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provide fire suppression of specific high challenge fire hazards
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extended coverage sprinkler - ANSW -400 max square feet discharge
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extra large orifice sprinklers - ANSW -= or > 1 inch less pressure to achieve a given discharge density
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fire command center - ANSW -...
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fire department connection - ANSW -normally on exterior of building... FDNY can pump supplemental
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water into the sprinkler system, standpipe, or other system furnishing water for fire extinguishment to
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supplement existing water supplies.
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fire pump - ANSW -a provider of liquid flow and pressure dedicated to fire protection. A fire pump is a part
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of a fire sprinklers system water supply and can be powered by electric, diesel or steam. connected to
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public water source or tank. provides higher pressure to sprinkler system
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Fire Pumps - ANSW -used as a main water supply source for sprinkler systems. They may also be used in
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combination with gravity tanks to supply sprinkler system. Fire pumps are designed to take the water
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from a supply source and then discharge the water into the fire protection system under pressure. The
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amount of pressure with which the water is discharged from the pump is called the total head. The total
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head is measured in pounds per square inch (psi). The higher the psi rating of the pump the greater the
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full flow test - ANSW -performed every 5 years:
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1. open main valve to let debris escape, then close
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2. system air a nd water pressrue recorded.
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3. relieve pressure by opening inspector test valve (use stopwatch)
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4. at dry pipe valve note aire pressure which valve trips an note time
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5. at inspectors test note time that water flows steadily.
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6. test terminated when clean water flows (shit valve)
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compare to past tests v v v




Glass bulb sprinkler - ANSW -operated by heat breaking a glass bulb filled with a non freezing liquid with
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diameters that vary form 3 mm for quick response to 5 mm for standard response
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Green tag - ANSW -no impairment found in entire system- main control valve
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