Local 483 Apprenticeship Study Guide

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Ambrose Godfey

>System consisted of a barrel of water which contained a charge of gunpowder in a waterproof container >A fuse to the powder explodes, the barrel ruptures

"Because of unique circumstances, there will be times when the common "wet pipe" sprinkler system found in the majority of properties is not a good choice for automatic fire protection. ( Such unique circumstances include )

>Unheated buildings >Refrigerated areas >Freezer areas >Occupancies with high combustible loading >Contents that are unusually susceptible to water damage

Side Wall Heads

>Used in areas that are tight on space like hallways >Sprinkler system will spray in a half-circle pattern

4 types of Fire Sprinkler Systems

>Wet System >Dry System >Deluge System >Pre-Action System

Main reason Fire Sprinkler fail...

A - Shut water supply valve is the most obvious way that an automatic sprinkler system can fail B - A broken water main C - Gravity, suction, or pressure tank empty, resulting from a failure of the responsible parties to periodically check the tank D - Failure of a fire pump to start automatically E - Obstruction/Painted heads/Corroded F - Frozen pipes

THE DELUGE SYSTEM.

A type of sprinkler system in which all the heads remain permanently open; when activated by a detection system, a deluge valve allows water into the system.

Alarm Check Valve

A valve that uses a clapper to prevent backflow of water from the sprinkler system and initiates an alarm when water flows through the system.

What should be placed on top of CPVC when its installed in an attic?

Adequate Insulation

Common types of prying tools include

Crowbar Ripping chisel Nail claw

A fire sprinkler that has been print post factory is legal

False

Underground main may be flushed after connection is made to overhead sprinkler piping

False

Underground main may be flushed after connection is made to overhead sprinkler system piping

False

Automatic fire sprinklers are supposed to extinguish fires simultaneously on different floors

False (Only where heat is collected)

FDC

Fire Department Connection

Oxygen Heat Fuel

Fire burns because three elements are present

Fire burns because of these 3 elements

Heat Fuel Oxygen

Frederick Grinnell

Helped to commercialize the Automatic Sprinklers

300 to 1000 F*

Ignition temp of ordinary combustible materials between

John Kane (1881)

Introduced a ball cartridge that would explodes at a hot TEMP

Charles E. Buell (1880s)

Invented a sprinkler that used defectors or baffles

Major Harrison(1864)

Invented the first sprinkler head but never patented it

Example of what type of hazard -School -Hospitals -Public Buildings

Light Hazard

Can you install sprinkler head in cpvc before installing drops?

No

What shall the hydraulic pressure of a fire sprinkler system that does not have an FDC be?

Normal System Operating Pressure

Most common powders used for extinguishing

Sodium bicarbonate + mono-ammonium phosphate

SSP

Standard Spray Pendent

SSU

Standard Sprinkler Upright

Common types of hammers include

Straight-claw Curved-claw Ball-peen Tack Dead blow Engineer's/Chipping hammers Mallets Sledgehammers

All pipe must be reamed

True

Petroleum based lubricants will NOT be used on VICS

True

Monoammonium phosphate

Used for A fires

Sodium Bicarbonate (NaHCO3)

Used for Class B Class C fires

Lintel

Vertical space above the door (Min of 8")

Vaporized

When most substances burn, the actual combustion takes place only after the liquid fuel has been?

Extinguishing Fire

>Remove Heat >Remove Fuel >Remove Oxygen >Stop the Reaction

Upright Sprinkler Heads

>Point up toward the ceiling >These heads are generally used in mechanical rooms or other inaccessible rooms

Normal gasket size for 1-1/2

.625

Normal gasket size for 3'' grove

.625

Normal gasket size for 8"

.750

Class B extinguishers

>Flammable liquids like gasoline, petroleum, oil, paint >Includes flammable gases like propane and butane >Extinguisher type: CO2, dry powder, and/or halon

Marcus Ruthenberg

>Introduced a glass ball held against an open pipe by a double arm lever arrangement held in place by a fusible solder >Ball used as a defector

Class A extinguishers

>Ordinary combustibles such as wood, paper, cloth, trash, and plastics. >Extinguisher type: Water, dry powder, and/or halon

"Ordinary" sprinkler heads temperature

135 to 170 F

1 in how many sprinklers will fail

16million

Side wall distance from the ceil

4 to 6

Min distance an ordinary fire sprinkler may be installed in front of a recessed fire place

6ft

The vaporization of water is very high

980 BTU per pound of water

Wet Pipe System

>A fire suppression sprinkler system that contains pressurized water in all pipes and has some form of valve in each protected area. >Most prevalent system

Pre-action System

>A fire suppression system that contains water in the pipes but will not release the water until detectors in the area have been activated. >Eliminating concerns of water damage due to accidental or false activation.

Auxiliary Drain Valve

>Also called Low-Point Drains or Drum Drips) >Are required for each section of trapped pipe in Dry or Pre-Action Fire Protection Systems >Auxiliary drains collect moisture from the system while minimizing the potential for excessive loss of air pressure

Regardless of whether a sprinkler system is of the wet, dry, deluge, or pre-action type, the sizes of piping used are important if?

>An acceptable flow rate (gallons per minute) and pressure (pounds per square inch) are to exist at each sprinkler head

Class D extinguishers

>Combustible metals such as potassium, sodium, aluminum magnesium >Extinguisher type: Dry powder

Class K extinguishers

>Cooking oils and greases such as animal fats and vegetable fats. >Extinguisher type: Wet chemical

Class C extinguishers

>Energized electrical equipment such as motors, transformers, and appliances. >Extinguisher type: CO2, dry powder, and/or halon

Dry Pipe System

>Fire suppression system that consists of closed sprinklers attached to piping system that contains air under pressure >Type of Fire System used in a building that may fall below freezing temperature


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