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Fire Captain Promotional > Handbook of Tactics Ch 4-6 > Flashcards

Handbook of Tactics Ch 4-6 Flashcards

1
Q

How many BTUs will a pound of wrapping paper give off when burned?

A

7,100 BTUs

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2
Q

How many BTUs does 1 pound of styrene foam give off?

A

18,000 BTUs

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3
Q

What two criteria determine whether your stream will extinguish the fire?

A
  1. VOLUME- Must be of sufficient to remove the heat being generated.
  2. REACH- The water must actually reach the heart of the fire.
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4
Q

How many BTUs per gallon does water absorb when raised from 70° to completely vaporized.

A

9,275 BTUs

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5
Q

A 1-3/4” line provide sufficient flow to knock down _________ of fire rapidly.

A

Four or five rooms

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6
Q

What size hose should you stretch for a large body of fire in a commercial or industrial fire?

A

2-1/2”

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7
Q

How many firefighters are required to operate a 2-1/2” line flowing 325 GPM through a 1-1/4” tip?

A

It can be handled by two people and moved by three.

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8
Q

What is the average size of a store in a one-story commercial building of ordinary construction, commonly called a taxpayer or strip mall?

A

20 x 75ft

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9
Q

What dictates the length of hoseline needed at a structure fire?

A
  1. Building height
  2. Building area
  3. Setback from the street
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10
Q

What dictates the diameter of the hoseline needed at a structure fire?

A
  1. Occupancy
  2. Area of the building
  3. Size of the fire
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11
Q

What is the maximum length of 1-1/2” hose if you want to flow 125 GPM?

A

200 ft

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12
Q

What is the maximum length of 1-3/4” hose if you want to flow 150 GPM?

A

300 ft

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13
Q

What is the rule of thumb for length of hose line needed?

A

The length plus the width of the building, plus one length for each floor above or below grade. (Plus extra for setback if needed)

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14
Q

The nozzle man should arrive at the fire area with at least ______ of hose

A

50 ft

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15
Q

Why should you chock doors open when stretching hoselines?

A

If the door closes and then the lead is charged it can:

  1. Lock the door closed
  2. Restrict the flow
  3. Prevent further advance
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16
Q

What are three priorities to consider when stretching the hoseline?

A
  1. Protect human life
  2. Confine the fire
  3. Extinguish the fire
17
Q

Except for specific life hazards, what is the first priority for positioning a hoseline in a multi-level building?

A

Position a hoseline to protect the interior staircases.

18
Q

When stretching a hoseline up the exterior, where should the hoseline enter the building?

A

Either the floor below or into a staircase window 1/2 story below.

19
Q

Is it acceptable to stretch a dry lead in the stairwell?

A

Yes, if the fire is above you. Never for below grade fires

20
Q

Generally one should attack from the unburned side. What are two exceptions to this rule

A
  1. When there is a potential life hazard, bring the lead straight to a location that puts it between the fire in the trapped occupants.
  2. A vacant or abandoned building.
21
Q

No nozzle should have an opening greater than_______.

A

1/2 the diameter of its supply

22
Q

Is it possible to use a larger tip than the rule of thumb (1/2 of hoseline diameter)?

A

Yes, if the hose stretch is kept short and the discharge pressure is raised sufficiently.

23
Q

How does an impinging jet nozzle create a dense fog?

A

By directing streams of water into each other

24
Q

What are the three functions of a nozzle?

A
  1. SHUT-OFF and regulation of the amount of water flowing past.
  2. Increase the VELOCITY of the water flowing through the hose.
  3. SHAPE the stream.
25
Q

Name the two main types of fog nozzles.

A
  1. Constant gallonage

2. Constant pressure

26
Q

Constant gallonage

A

Constant amount of water flows out the opening regardless of the stream shape (as long as the nozzle pressure remains constant).

27
Q

At what pressure are most constant gallonage nozzles designed to operate?

A

100 psi

28
Q

Constant pressure or automatic nozzle

A

Uses a spring to regulate the size of the discharge opening so that at varying flows (as much as 60-350gpm) you can maintain a constant 100 psi nozzle pressure.

29
Q

What is a major drawback of the automatic nozzle?

A

It is possible to have a good looking stream with sufficient reach that is flowing less than the desired GPM.

30
Q

What is the range of a Bresnan distributor nozzle?

A

15-20 foot radius

31
Q

What is the range of a cellar pipe?

A

50 feet or more

32
Q

What is the drawback of a cellar pipe?

A

They can only apply water in one or two directions at a time and must be constantly manned.

33
Q

When using high expansion foam, what precaution must be taken?

A

A vent opening must be provided, preferably opposite the place where the form is being injected, to allow the heat, smoke, and flame to escape.

34
Q

Under what circumstances can you enter enter an area of high expansion foam? (6 parts)

A
  1. Entry is for life-saving purposes.
  2. Entry is needed for fire containment purposes and the structural stability of the area is assured.
  3. Equipped with SCBA, PASS, rope or hoseline, hook to sound the floor.
  4. Electricity is shut down.
  5. RIT standing by.
  6. Use only a straight stream.
35
Q

What are 2 advantages of CAFS?

A
  1. Allows the water to penetrate deeper into porous material.
  2. Allows water to remain on vertical surfaces and ceilings longer by forming a foam blanket.
36
Q

What nozzle can be used effectively in extreme wind driven fire in class one high-rises?

A

The applicator pipe from the floor below.

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