Chapter 5- Fire Behavior and Building Construction Flashcards Preview

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Flashcards in Chapter 5- Fire Behavior and Building Construction Deck (31)
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1
Q

The initial stage of a fire after ignition, usually involving a single or small number of combustibles.

A

Incipient

2
Q

The secondary stage of a fire in which it spreads to adjacent combustible materials.

A

Free burning

3
Q

A transition stage in which exposed surfaces within the compartment ignite simultaneously and fire spreads throughout the compartment. Results in full room involvement.

A

Flashover

4
Q

A stage in which glowing combustion takes place, without flame.

A

Smoldering/decay

5
Q

Aluminum will melt at around __ degrees F.

A

1200

6
Q

The fire growth building problem can be differentiated based on its location: __ __

A

Hidden, Exposed

7
Q

The fire growth contents problem can result from any of the following elements:
__
__
__

A

Furnishings
Interior finish, including decorations
Mercantile stock

8
Q

The paper vapor seal on __ __ glass fiber insulation leads to a phenomenal rate of flame spread.

A

Batt type

9
Q

Large groups of __ __ can support self sustaining ignition.

A

Electrical wires

10
Q

There are three ways in which interior finishes may increase the fire hazard:
__
__
__

A
  • They may increase fire extension by surface flame spread.
  • They may generate smoke and toxic gases.
  • They may add fuel to the fire, contributing to flashover.
11
Q

When punched with holes, high density fiberboard is called __.

A

Pegboard

12
Q

National Institute of Standards and Technology (NIST) researchers noted that CO generation in such void could be as much as __ times what is normally generated.

A

50

13
Q

Often cotton sheeting is used, which has a high flame spread, in proximity to light bulbs (a __ watt bulb can ignite cotton) or candles.

A

100

14
Q

There are several possible approaches to control the problem of fast fire growth, including __, __, __, __.

A
  • Eliminating High Flame Spread Surfaces
  • Separating material from the source of combustion
  • Cutting off the extension of the fire
  • Coating the materials
15
Q

Ballast in fluorescent fixtures can reach temperatures of __ degrees F.

A

1500

16
Q

Haber’s rule states that any exposure in which the concentration (in parts per million) x minutes exposed equals __ is likely to be dangerous.

A

33,000

17
Q

But don’t forget that aluminum also anneals when exposed to prolonged heat of __ degrees F and higher- that means it starts to lose its rated strength.

A

350

18
Q

The vertical spread of fire on the exterior of a multistory building, from one floor to the floor above, via convection and radiation.

A

Autoexposure

19
Q

Low density fiberboard made of wood fibers or sugar cane residue

A

Bagasse

20
Q

Fiberglass or rock wool insulation with various thicknesses; it may or may not have a paper covering.

A

Batt insulation

21
Q

The hot, buoyant gases that collect at the very top of a room.

A

Ceiling layer

22
Q

Fiberboard in which holes have been punched.

A

Combustible acoustical tile

23
Q

The process of air being drawn into a fire.

A

Entrainment

24
Q

The column of flames, smoke, and heated gases rising above the burning object.

A

Fire plume

25
Q

A situation in which unburned fuel gases, having gathered in sufficient quantities at the ceiling layer, suddenly ignite; also called rollover.

A

Flameover

26
Q

Sometimes used as an interior finish, a product made of wood particles such as wood shavings and bound together with a suitable binder.

A

Low density fiberboard

27
Q

Ceilings made of embossed steel and wooden boards.

A

Matchboarding

28
Q

Toxic chemicals used as nonflammable coolants in transformers that may be released during fires.

A

Polychlorinated biphenyl (PCB)

29
Q

A commercially produced organic compound used in transformers and capacitors due to its electrical insulator properties and low flammability rating.

A

Polyvinyl chloride (PVC)

30
Q

Cellular foam plastic that is used as an interior finish.

A

Rigid Foamed polyurethane

31
Q

Asphalt coated steel.

A

Robertson protected metal