Final Exam

Question 1

Balanced pressure proportioner

Answer 1

A proportioner that uses an atmospheric tank and pump to introduce the foam concentrate into the system with the water supply.

Question 2

Compressed air foam system

Answer 2

A fixed or mobile fire protection system that uses foam produced by mixing water, foam concentrate, and air or nitrogen under pressure.

Question 3

Deflagaration

Answer 3

The ignition of a flammable gas mixture that proceeds at a rate less than the speed of sound.

Question 4

Fixed automatic foam system

Answer 4

A fire protection system incorporating foam concentrate, a deluge or preaction valve, piping network, and proportioning and distribution equipment; the system automatically activates by fire detectors or is manually activated upon detection of fire, delivering useable foam to the protected hazard.

Question 5

Foam concentrate

Answer 5

A condensed form of the foam product.

Question 6

Oscillating monitor nozzle

Answer 6

A foam distribution device that sweeps back and forth over an area.

Question 7

Preprimed system

Answer 7

A wet foam-water sprinkler system in which the piping holds a foam solution instead of water.

Question 8

Subsurface injection

Answer 8

A method of distributing foam by injecting it below the surface of the fuel.

Question 9

Venturi proportioner

Answer 9

A proportioner that uses water moving over an open orifice to create a lower pressure at the opening that draws the foam into the water stream.

Question 10

Dry chemical extinguishing agent

Answer 10

A dry powder suppression agent made from sodium bicarbonate-based, potassium-based, or ammonium phosphate chemicals that covers and smothers the burning material.

Question 11

Fixed dry chemical extinguishing system

Answer 11

An automatic dry chemical agent-based extinguishing system that is self-contained, automatic, and uses a pressurized gas to expel the agent through a network of piping and nozzles onto the hazard.

Question 12

Fluidization

Answer 12

The process of mixing an expellant gas with a dry chemical agent to facilitate distribution of the dry chemical.

Question 13

Multipurpose dry chemicals

Answer 13

Dry chemical agents rated for class A, B, and C fires.

Question 14

Regular or ordinary dry chemicals

Answer 14

Dry chemical agents rated only for class B and C fires.

Question 15

Total flooding system

Answer 15

A fire suppression system designed for use within an enclosed area where the agent fills the entire area to achieve extinguishment.

Question 16

Aerosol fire extinguishing system

Answer 16

A type of fire suppression system that delivers small chemical particles through a gas medium to create an aerosol agent.

Question 17

Detonation

Answer 17

The ignition of a flammable gas mixture that proceeds at a rate greater than the speed of sound.

Question 18

Oscillating monitor nozzle

Answer 18

A foam distribution device that sweeps back and forth over an area.

Question 19

Preprimed system

Answer 19

A wet foam-water sprinkler system in which the piping holds a foam solution instead of water.

Question 20

Subsurface injection

Answer 20

A method of distributing foam by injecting it below the surface of the fuel.

Question 21

Fixed wet chemical extinguishing system

Answer 21

An automatic liquid agent-based extinguishing system that is self-contained, automatic, and uses a pressurized gas to expel the agent through a network of piping and nozzles onto the hazard, which is usually commercial kitchen cooling equipment.

Question 22

Fluidization

Answer 22

The process of mixing an expellant gas with a dry chemical agent to facilitate distribution of the dry chemical.

Question 23

Wet chemical extinguishing agent

Answer 23

A suppression agent that mixes water with potassium acetate, potassium carbonate, potassium citrate, and, in some instances, a mixture of these agents and other additives; used primarily to suppress class K fires.

Question 24

Halocarbon

Answer 24

A chemical compound made up of carbon, hydrogen, chlorine, fluorine, bromine, or iodine

Question 25

Halon

Answer 25

A commonly used term for halogenated hydrocarbons.

Question 26

PASS

Answer 26

Pull, aim, squeeze, and sweep

Question 27

Loaded stream

Answer 27

Water treated with an alkali salt to prevent freezing.

Question 28

Stored pressure extinguisher

Answer 28

A type of extinguisher where a pressurized gas and agent mix in the same tank; When operated, the pressure of the gas forces the extinguishing agent out of the tank and through the nozzle or horn.

Question 29

Wetting agent

Answer 29

A chemical compound added to water that reduces the water’s surface tension, thus allowing better penetration into the fire environment.

Question 30

Buoyancy forces

Answer 30

Upward forces that cause hot gases to rise when fire plume temperatures are higher than the surrounding air.

Question 31

Pressure differential

Answer 31

A smoke control strategy in which mechanical systems create relative pressure differences between a protected area and an adjacent area within a building.

Question 32

Refuge area pressurization

Answer 32

Outdoor air is pumped into the refuge area at an increased pressure, forming a pressure barrier that prevents smoke and gases from entering the refuge area.

Question 33

Smoke control

Answer 33

A term used to describe mechanical (active) systems that pressurize (both positively and negatively) areas of buildings with fans, limiting smoke movement in fires.

Question 34

Smoke management

Answer 34

A term used to describe all passive and active methods and systems used alone or in combination to alter smoke movement.

Question 35

Smoke removal

Answer 35

The use of unpolluted make-up air to push smoke and gases towards exhaust equipment.

Question 36

Stack effect

Answer 36

The upward movement of air in a building where the interior temperature is warmer than the exterior temperature.

Question 37

Stairway pressurization

Answer 37

A mechanical method of smoke control in which air pumped into a stairway at an increased pressure forms a pressure barrier, preventing smoke and gases from entering the stairway.

Question 38

Exit access

Answer 38

The portion of the means of egress that leads to the exit.

Question 39

Exit discharge

Answer 39

The portion of the means of egress between the exit and the public way.

Question 40

Ingress

Answer 40

The entrance or way into a property or structure from the public way.

Question 41

Travel distance

Answer 41

The total distance a person travels within the exit access to reach an enclosed exit stairway, exit passageway, exterior door, or horizontal exit.