Chapter 1

Question 1

The potential energy available for release that could be generated by the combustion reaction if a fuel were completely burned.

p. 13

Answer 1

Heat of combustion

Question 2

Reactions that absord energy such as converting a liquid to a gas are called:

p. 14

Answer 2

Endothermic

Question 3

3 elements of fire triangle:

p. 15

Answer 3

• Oxygen
• Fuel
• Heat

Question 4

4 elements of fire tetrahedron:

p. 15

Answer 4

• Fuel (agent that reduces)
• Oxygen (oxidizing agent)
• Heat
• Chemical chain reaction

Question 5

HCN is ___ times more toxic than CO.

p. 21

Answer 5

35 times

Question 6

Total amount of heat released per unit of time:

p. 22

Answer 6

Heat Release rate

Question 7

The measure of the rate of heat transfer to or from a surface:

p. 22

Answer 7

Heat flux

Question 8

Heating that occurs when electric current flows through a conductor.

p. 25

Answer 8

Resistance heating

Question 9

When current flow through a conductor exceeds its design limit.

p. 24

Answer 9

Overcurrent or overload

Question 10

A high temperature luminous electric discharge accros a gap.

p. 25

Answer 10

Arc

Question 11

When an electric arc occurs, luminous particles can form and splatter away from the point of arcing.

p. 25

Answer 11

Sparking

Question 12

_________ is the transfer of thermal energy by the circulation or movement of a liquid or gas.

p. 27

Answer 12

Convection

Question 13

Incipient Stage

Hot gases in the plume rise until they encounter the ceiling and then spread horizontally. This flow of fire gases is called:

p. 43

Answer 13

Ceiling Jet (mushrooming)

Question 14

A visual indictor that fire is leaving the incipent stage is flame height. When flames reach _______ feet the fire will enter the growth stage.

p. 43

Answer 14

2.5 feet

Question 15

Oxygen concentraions:

Room Air: _____

Oxygen Deficient: _____

Oxygen enriched: _____

Materials can ignite as low as: _____

Nomex will burn at: _____

p. 38

Answer 15

21%

19. 5%
20. 5%

15%

31%

Question 16

Isolated or intermittent flames (rollover) may move through the hot gas layer. This phenomenon is sometimes an immediate indicator of:

p. 47

Answer 16

Flashover

Question 17

Four common elements of flashover:

p. 51

Answer 17

• Transition from growth to fully developed
• Rapidity
• Fire must be in a compartment (enclosed space)
• Pyrolysis of all exposed surfaces

Question 18

As flashover occurs temperature can reach ______degrees. This temp is also the autoignition temp of CO.

p. 52

Answer 18

1,100 degrees

Question 19

This neutral plane may indicate that fire is in the early stages of development or a fire is above your level.

Note: high ceilings can hide a fire that has reached a later stage.

p. 52

Answer 19

High Neutral Plane

Question 20

This nuetral plane could indicate that the compartment has not ventilated or that a flashover is approaching.

p. 52

Answer 20

Mid-level Neutral Plane

Question 21

This neutral plane may indicate that the fire is reaching flashover conditions.

This occurence could also mean the fire is below you.

p. 53

Answer 21

Very low-level neutral plane

Question 22

__________ occurs when a mixture of unburned fuel gases and oxygen accumulate away from the fire comes in contact with an ignition source.

These are violent because they involve pre-mixed fuel and oxygen.

p. 63

Answer 22

Smoke explosion

Question 23

The total quantity of combustible contents of a building contents, structure, finishes and trim.

p. 65

Answer 23

Fuel load or Fire load (same thing)