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S12 CITYWIDE SPRINKLER SYSTEMS
QUESTIONS WITH VERIFIED AND CORRECT
ANSWERS WELL ELABORATED AND
ACCREDITED A+ GRADED-CALIFORNIA
CAREER COLLEGE
hydraulic placard sign attached to a hydraulically calculated sprinkler system indicating the design density, required gallons per minute and pressure for the system to operate properly hydraulically calculated systems method of sizing auto sprinkler piping using a prescribed amount of water to be distributed over a specific area. impairment coordinator in charge of safety during out of service systems intermediate level sprinkler sprinkler equipped with integral shields to protect the operating elemtn form discharge from sprinklers installed at higher elevations
large orifice sprinkler sprinkler head with orifice size equal or greater than 3/4 and less than 1 inch listed device A fire protection component that has been tested to perform under parameters specified for its use by a nationally recognized testing agency. Underwriter's Laboratory (UL) and Factory Mutual (FM) are the two most common. Master Pressure Reducing Valve A pressure reducing valve installed to regulate pressures in an entire fire protection system and/or standpipe system zone. Main Drain The primary drain connection located on the system riser and also utilized as a flow test connection. Microbiologically Influenced Corrosion (MIC) Corrosion caused by the presence of microbes in the water supply that over time attack the interior of metallic piping and cause leaks, pitting, and blockages.
Pressure Control Valve A pilot operated pressure reducing valve that may be used with a fire or booster pump designed for the purpose of preventing the incoming water supply pressure from dropping below a set pressure. Pressure-Reducing Valve A valve designed for the purpose of reducing the downstream water pressure under both flowing (residual) and nonflowing (static) conditions. Pressure Relief Valve A valve designed for the purpose of releasing excess air or water pressure from the Fire Protection Piping System. Pressure Tank A tank using air pressure to supplying water for water-based fire protection systems. Tank contents to be maintained at one third air to two thirds water. 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
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. Curb Valves
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 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 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 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
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) 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 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 pressure in the sprinkler system until it reaches acceptable levels. The booster pump should not be confused with the fire pump or the jockey pump. Sprinkler system piping Branch lines are directly connected to sprinkler heads.
Control valve A valve controlling flow to water base fire protection system. Control valve do not include hose valves Fire pump locations the fire pump should be located in a place that is noncombustible or fire resistant. has to be heated to a minimum of 40 degrees Fahrenheit. Gravity tanks should be how high above the highest sprinkler head? 25 feet. What are the three methods to heating a gravity tank Hot water circulation Steam is discharged directly into the tank steam coils are placed inside the tanks Heat from the sun is used A ________ DISC OF 8-9 INCHES SHALL BE PLACED ON CONNECTIONS TO INDICATE THE SYSTEM IS PARTIALLY OUT OF SERVICE.
BLUE
THE IMPAIRMENT COORDINATOR WILL NOTIFY THE ___________ CARRIER, CENTRAL
STATION AND OCCUPANTS.
INSURANCE
PRIOR TO RETURNING A SYS. TO SERVICE, THE ___________ SHALL ENSURE THAT
NECESSARY TESTS AND INSPECTIONS ARE CONDUCTED.
IMPAIRMENT COORDINATOR
GLYCERIN NOT GREATER THAN _________ PERCENT OR GLYCOL NOT GREATHER THAN
________ PERCENT SHALL BE USED TO PROTECT FROM FREEZING.
THE COF NUMBER AND SIGNATURE OF COF HOLDER SHALL BE POSTED NEAR THE
____________.
MAIN CONTROL VALVE
__________ SHALL BE READILY AVAILABLE TO ANY REPRESENTATIVE OF THE FIRE
DEPT. THESE ARE TO BE MAINTAINED ON SITE FOR 3 YEARS.
RECORDS
WET PIPE SYSTEMS HAVE WATER AT A MINIMUM TEMP. OF _______ TO PREVENT THE
SYSTEM FROM FREEZING.
40 FAHRENHEIT
__________ VALVES ARE NO LONGER PERMITTED TO BE INSTALLED.
COLD WEATHER
________ SYSTEMS ARE INSTALLED WHERE A WET PIPE SYSTEM CANNOT BE HEATED
TO PREVENT FREEZING.
DRY PIPE
THE DROP IN ________ CAUSES A SPECIAL DRY PIPE VALVE TO OPEN.
AIR PRESSURE
IN BUILDINGS WHERE LIFE HAZARD IS HIGH (SCHOOLS, HOSPITALS) THE ALARM IS
TRANSMITTED DIRECTLY TO THE _________.
FIRE DEPARTMENT
DRY PIPE VALVES ARE OF A ______ DESIGN.
CLAPPER
DRY PIPE VALVES ARE USUALLY SET AT ________ PSI ABOVE THE NORMAL TRIP
LEVEL.
AN ACCELERATOR AND EXHAUSTER ARE USED TO _______THE TIME TO ALLOW WATER
INTO THE SYSTEM.
REDUCE
BOTH ACCLERATOR AND EXHAUSTER ARE ACTIVATED WHEN A DROP OF _______ PSI IS
DETECTED IN THE SYSTEM.
IN A PREACTION SYSTEM, THE ___________ IS OPENED BEFORE THE SPRINKLER
HEADS.
PREACTION VALVE
PREACTION SYSTEM ALARMS ARE GIVEN AS SOON AS THE _________ IS OPENED.
EXTERIOR EXPOSURE SPRINKLERS USE OPEN SPRINKLER HEADS TO FORM A _______
ON THE WALL OF A BUILDING.
WATER CURTAIN
_________ SYSTEMS ARE USED FOR THE PROTECTION OF SPECIAL HAZARDOUS
OCCUPANCIES.
FOAM SUPPLY
THE COF HOLDER SHALL KNOW THE LOCATION OF ALL SPRINKLER HEADS, CONTROL
VALVES, SUPPLY LINES AND _________ ROOMS.
COMPACTOR
A SIGN INDICATING THE LOCATION OF ALL _______ SHALL BE KEPT IN THE
COMPACTOR ROOM.
CONTROL VALVES
ALL INDICATING VALVES IN THE COMPACTOR SPRINKLER SYSTEM SHALL BE ________
OPEN.
SEALED
A MINIMUM OF _________ EXTRA SPRINKLER HEADS WITH THE APPROPRIATE
WRENCHES SHALL BE AVAILABLE TO REPLACED DAMAGED ONES
THE COF HOLDER SHALL CONDUCT AN INSPECTION OF THE ENTIRE SPRINKLER
SYSTEM AT LEAST __________.
ONCE A MONTH
AUTOMATIC BALL DRIP DEVICES SHALL BE INSTALLED IN THE _________ POSITION.
HORIZONTAL
IF THE SPRINKLER SYS. IS SUPPLIED FROM PUBLIC WATER MAIN, THE CONTROL
VALVE SIGN MAY READ ________________.
"SHUTOFF FOR SPRINKLER SYS. LOCATED 6 FEET FROM THIS SIGN"
GATE VALVES OF THE NON-INDICATING TYPE ARE CALLED ________.
CURB VALVES
