new company officer chapter 11.2 fire

Question 1

a room or space within a building or structure that is enclosed on all sides at the top and bottom.

Answer 1

compartment p. 307

Question 2

form of energy associated with the motion of atoms or molecules and capable of being transmitted through solid and fluid media by conduction, through fluid media by convention, and through empty space by radiation

Answer 2

heat p. 307

Question 3

transfer of heat by the movement of heated fluids or gases, usually in an upward direction

Answer 3

convection p. 307

Question 4

transmission or transfer of heat energy from one body to another at a lower temperature through intervening space by electromagnetic waves, radio waves, or x rays

Answer 4

radiation p. 307

Question 5

physical flow or transfer of heat energy from one body to another through direct contact or an intervening medium for the point where the heat is produced to another location or from a region of high temperature to a region o low temperature.

Answer 5

conduction p. 307

Question 6

the greater the temperature difference between the objects, the ____ _____ the transfer rate

Answer 6

more rapid p. 307

Question 7

what are the three methods of heat transfer

Answer 7

conduction, convection, radiation p 307

Question 8

the spread of fire is controlled by

Answer 8

its environment p. 307

Question 9

once heat levels rise to a degree in which those objects are the same temperature, radiant heat energy is _________

Answer 9

reflected back. p. 307

Question 10

fires that are limited by the available oxygen supply is said to be

Answer 10

ventilation controlled p. 308

Question 11

when sufficient oxygen is available, fire development is controlled by the fuel’s characteristics and configuration. Under these conditions the fire is said to be

Answer 11

fuel controlled p. 308

Question 12

thermal layering of gases is also called

Answer 12

heat stratification p.308

Question 13

the tendency of gases to form into layer according to temperature.

Answer 13

heat stratification or thermal layering p.308

Question 14

as the volume and temperature of the hot gas layer increases, what does the pressure do?

Answer 14

increases p 308

Question 15

the interface of the hot and cooler gas layers at the opening is commonly referred to as

Answer 15

the neutral plane p.309

Question 16

moment when a mixture of fuel and oxygen encounters an external heat (ignition) source with sufficient heat energy to start the combustion reaction.

Answer 16

piloted ignition p. 309

Question 17

minimum temperature to which a fuel (other than a liquid) in the air must be heated in order to start self sustained combustion, no external ignition source is required.

Answer 17

auto ignition temperature. p. 309

Question 18

this occurs when all exposed combustible surfaces and objects within a compartment have been heated to their ignition temperature and ignite almost simultaneously.

Answer 18

flashover p. 309

Question 19

flashover represents a transition from the growth stage to what stage

Answer 19

fully developed stage p. 310

Question 20

what two factors determine whether a compartment fire will progress to flashover

Answer 20

the fuel must generate enough heat energy to develop flashover conditions and the second is ventilation. p. 310

Question 21

most fires that grow beyond the incipient stage become

Answer 21

ventilation controlled. p. 310

Question 22

what influences ventilation

Answer 22

the size, number, and locations of opening as well as the velocity of air being exchanged. p. 310

Question 23

this is a condition in which the unburned fire gases that have accumulated at the top of a compartment ignite and flames propagate through the hot gas layer or across the ceiling.

Answer 23

rollover p. 311

Question 24

this is a significant indicator of impending flashover

Answer 24

rollover p. 311

Question 25

rollover may occur during what stage

Answer 25

the growth stage p. 311

Question 26

rollover generates a tremendous amount of what type of heat

Answer 26

radiant p. 311

Question 27

backdraft occurs in what stage

Answer 27

decay p. 311

Question 28

an increase in low level ventilation prior to upper level ventilation can result in what

Answer 28

backdraft p. 311

Question 29

instantaneous explosion or rapid burning of superheated gases that occurs when oxygen is introduced into an oxygen depleted confined space.

Answer 29

backdraft p. 311

Question 30

backdraft conditions can develop where

Answer 30

a room, void space, or an entire building. p. 312

Question 31

air current changing direction, neutral plane lifting, or smoke rushing out are indicators of

Answer 31

potential rapid fire development p. 312

Question 32

the violence of a backdraft is dependent on the extent of what? .

Answer 32

to which the fuel/air mixture is confined p 312