Chapter 16 Ventilation Rules and Equipment

Question 1

What are the three types of size-ups?

Answer 1

Initial
Continuing
Division-area-group size-up

Question 2

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

Answer 2

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

Question 3

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

Answer 3

Horizontal and vertical

Question 4

Why can vertical ventilation be the preferred avenue of exhaust?

Answer 4

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

Question 5

What are the four basic types of ventilation openings?

Answer 5

Natural openings
Construction openings
Heat openings
Directional openings

Question 6

What is another name for a directional ventilation opening?

Answer 6

Strip ventilation

Question 7

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

Answer 7

Two

Question 8

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

Answer 8

Far enough to be easily seen

Question 9

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

Answer 9

Visual size-up or indicator openings

Question 10

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

Answer 10

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

Question 11

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

Answer 11

Roof is sagging and possibly about to fail

Question 12

Ventilators for heat generating appliances are generally identified how?

Answer 12

They have a serrated top suspended over the pipe

Question 13

Ventilators for attics or top floors can be indentified how?

Answer 13

They have a capped top or a turbine

Question 14

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

Answer 14

30 percent more efficient

Question 15

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

Answer 15

4’x4’

8’x8’

Question 16

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

Answer 16

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

Question 17

What is clearspan?

Answer 17

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

Question 18

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

Answer 18

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

Question 19

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

Answer 19

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

Question 20

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

Answer 20

always us the lower portion of the blade

Question 21

What is the limited depth of a rotary saw?

Answer 21

3 1/2”- 5”

Question 22

What governs the depth of cut of a chainsaw?

Answer 22

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

Question 23

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

Answer 23

70cc or 4 cubic inches

Question 24

What is a dependable chain pitch?

Answer 24

.404 inches

Question 25

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

Answer 25

Spraying vegetable shortening on a clean engine and bar.

Question 26

What is a safe depth cut?

Answer 26

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

Question 27

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

Answer 27

once every 10 seconds

Question 28

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

Answer 28

When you find:

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

Question 29

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

Answer 29

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

Question 30

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

Answer 30

once a month