Chapter 16 Ventilation Rules and Equipment Flashcards Preview

Truck Company Operations Mittendorf 1998 > Chapter 16 Ventilation Rules and Equipment > Flashcards

Flashcards in Chapter 16 Ventilation Rules and Equipment Deck (30)
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1
Q

What are the three types of size-ups?

A

Initial
Continuing
Division-area-group size-up

2
Q

Plans for ventilation operations are based on what three primary considerations?

A

Direction of travel, method of pressurization, and type of opening

3
Q

What are the two avenues used to direct the travel of contaminants within a structure?

A

Horizontal and vertical

4
Q

Why can vertical ventilation be the preferred avenue of exhaust?

A

It provides a natural avenue for rising contamininants, and it exhausts the most dangerous portions of the contaminants first

5
Q

What are the four basic types of ventilation openings?

A

Natural openings
Construction openings
Heat openings
Directional openings

6
Q

What is another name for a directional ventilation opening?

A

Strip ventilation

7
Q

What is the minimum number of ladders that should be placed to a structure?

A

Two

8
Q

How far should the fly of an extension ladder be raised above a parapet or the roofline?

A

Far enough to be easily seen

9
Q

How can the location and extension of a structure fire be determined?

A

Visual size-up or indicator openings

10
Q

What is the proper depth of cut for a power saw?

A

Normally, cuts should only be so deep as to cut through the roof decking

11
Q

A vent pipe that appears to be growing upward is an excellent indicator of what?

A

Roof is sagging and possibly about to fail

12
Q

Ventilators for heat generating appliances are generally identified how?

A

They have a serrated top suspended over the pipe

13
Q

Ventilators for attics or top floors can be indentified how?

A

They have a capped top or a turbine

14
Q

How much more efficient is a ventilator with an operational turbine than one that has been taken off?

A

30 percent more efficient

15
Q

What is the recommended size roof opening for a dwelling? Commercial property?

A

4’x4’

8’x8’

16
Q

When ventilating a roof that has been exposed to fire and is weakend, where do you start the cut?

A

Start the cut in the weakest portion of the roof and work towards the strongest portiion–and towards egress

17
Q

What is clearspan?

A

It is the uninterrupted or unsupported span of a roof or its structural members

18
Q

What should you do to a rock or gravel roof before using the chain saw?

A

Cut a small hole through the rock and gravel. The chan saw can then be used

19
Q

What is the standard configuration of a pick-head axe?

A

six-pound head mated to a 32-33 inch handle

20
Q

What part of the rotary saw blade should you use for cutting?

A

always us the lower portion of the blade

21
Q

What is the limited depth of a rotary saw?

A

3 1/2”- 5”

22
Q

What governs the depth of cut of a chainsaw?

A

Length of the guide bar–varies from 12-24 inches

23
Q

At a minimum, how big should the engine be on a fire service chainsaw?

A

70cc or 4 cubic inches

24
Q

What is a dependable chain pitch?

A

.404 inches

25
Q

What is an easy and inexpensive way to reduce build up of waste material on chain saws?

A

Spraying vegetable shortening on a clean engine and bar.

26
Q

What is a safe depth cut?

A

being deep enough to create a ventilation opening without impairing the structural integrity of the roof

27
Q

On older saws with manual oilers, how often should the chain be lubricated?

A

once every 10 seconds

28
Q

When examing carbide chains, when should you replace the chain?

A

When you find:

  • -3 damaged teeth in a row, 6 damaged teeth total
  • -Cracked or broken tie straps
  • -dull teeth
29
Q

When using a bullet chain on a chainsaw, when do you replace the cutter? When do you replace / repair the chain?

A

replace the cutter if 50 percent of the carbide is missing

repair or replace the chain if more than 50 percent of the cutters are damaged or broken

30
Q

Because of the fuel additives and alcohol added to todays fuels, how often should you change the fuel in the saws and supply cans?

A

once a month