Fire Prevention and Control

Question 1

What is the Fire Triangle? (3 elements needed to start a fire)

Answer 1

Fuel
Air
Ignition (heat)

Question 2

_____ include materials that, due to their chemistry, can be altered through a chemical reaction do produce carbon dioxide abs water.

Answer 2

Fuel

Question 3

______ _______ are materials that have the captivity to resist changes when exposed to air, heat, shock or pressure under normal conditions.

Answer 3

Stable fuels

Question 4

_____ _____ chemically react or become self-reactive when exposed to air, water, heat, shock or pressure. Gasoline propane, natural gas, solvents, solvent based paints and adhesives are an example of this.

Answer 4

Unstable fuels

Question 5

______ is the energy necessary to increase the temperature of the fuel to a point where a sufficient vapours are given off to allow ignition to occur.

Answer 5

Heat

Question 6

What are the 3 possible forms of ignition?

Answer 6

Piloted (spark)
Auto-ignition (heat it up, oven)
Spontaneous (chemicals form own heat)

Question 7

What are some chemicals which can spontaneously ignite?

Answer 7

Acids, alkalis, oxidizing agents

Question 8

As the varnish on a rag _____, the temperature of the rag ______. This is due to the large _____ _____ of the rag, which speeds oxidization but slows heat dissipation.

Answer 8

Oxidizes (evaporates)
Increases
Surface area

Question 9

What are the 4 classifications of fire?

Answer 9

Class A - Ordinary Combustibles
Class B - Flammable liquids
Class C - Electrical
Class D - Combustible materials

Question 10

What is Class A fires? And symbol

Answer 10

Ordinary combustibles. These fires require the cooling effects of water or water solutions.

GREEN TRIANGLE

Question 11

What is a class B fire? And symbol

Answer 11

Flammable liquids. These fires are best extinguished by smothering them with DRY CHEMICAL or FOAM AGENTS or displacing the oxygen in the vicinity with carbon dioxide agents.

RED SQUARE

Question 12

What is Class C Fire? And symbol

Answer 12

Fires that occur in energized or live electrical equipment. The extinguishing agent recommended dry chemical or carbon dioxide agent.

BLUE CIRCLE

Question 13

What is a class D fire? And symbol

Answer 13

Combustible metals. Magnesium, titanium, zirconium, sodium and potassium are examples of metals that act as fuels for class d fires.

YELLOW STAR

Question 14

In Canada, manufacturers submit their extinguishers to the ___ ______ of _____ for evaluation.

Answer 14

Underwriters laboratories of Canada

Question 15

A 4A fire extinguisher can extinguish roughly _____ times as much fire as a 1A.

Answer 15

4

Question 16

_____ _____ extinguishers are generally red, have a large tapered nozzle and are very heavy.

Answer 16

Carbon dioxide

Question 17

_____ _____ extinguishers are usually red and have either a long narrow hose or no hose at all.

Answer 17

Dry Chemical

Question 18

_____ extinguishers are generally silver in colour, have a flat bottom and a long narrow hose and are quite large.

Answer 18

Water

Question 19

It is the responsibility of the ________ of the extinguisher to maintain it once it is in service.

Answer 19

Owner/operator

Question 20

Never fight a fire when:

Answer 20

The fire could block your escape
You do not have the proper equipment to fight the fire or
The fire has spread beyond where it started

Question 21

To be most effective, aim the fire extinguisher at the base of the fire.
T or F

Answer 21

T

Question 22

What does PASS stand for?

Answer 22

Pull the pin
Aim the nozzle
Squeeze the handle
Sweep the nozzle

Question 23

How does one dispose of oily rags?

Answer 23

Special metal cans

Question 24

How should solvent soaked rags be stored?

Answer 24

Closed containers

Question 25

What must take place in solids and liquids before burning can occur (before the fuel can ignite into flames)

Answer 25

Vaporization of the surface must take place.

Question 26

When the surface temperature of a log reaches _____ degrees the wood begins to discolour.

Answer 26

300