Chapter 22 Fire Suppression

A combination fire attack begins with

an indirect attack

A master stream device that is permanently mounted on an engine and plumbed directly into the pump is a

Deck gun

A vehicle fueled by CNG or LPG is fully involved in fire. Which of the following should be used to fight the fire

Unmanned master stream

An elevated master stream device mounted at the tip of an aerial ladder is a

ladder pipe

Application of water to the base of a fire with a straight stream or solid stream is a(n) __________ attack

Direct

Close-range application of water to the fire is the objective of which type of operation

Offensive

Commonly used master stream devices flow

350 to 1500 gpm (1325 to 5675 lpm)

Defensive firefighting operations are conducted from which location

Exterior

Exposure protection during a defensive operation takes __________ priority

High

For which type of operations are master stream devices most commonly used

Defensive

From a doorway, a crew directs a hose stream at the ceiling of a burning room. This is a(n) __________ attack

indirect

How much risk to fire fighters' lives is acceptable in attempting to minimize damage to property that is already severely damaged

None

How should fire fighters approach a vehicle fire

45-degree angle from the side

If it is necessary to approach a horizontal flammable-gas cylinder, you should approach

perpendicular to the side

If there is no life-safety hazard, which type of fire attack should be used in a building under construction

Defensive

In a direct attack, water should be applied until

all visible flame is extinguished

In general, the most effective means of fire suppression is a(n) __________ attack

Direct

In which type of operation are large handlines and master streams more often used

Defensive

Large handlines flow approximately

250 gpm (950lpm)

Master streams are most commonly used for __________ attack

defensive

Operations are conducted from outside of the fire building in which operational mode

defensive

Peeling or bubbling paint is an indicator of

concealed fire

Portable monitors, deck guns, and ladder pipes are examples of

master stream devices

The use of master streams on a building should be prohibited if

crews are working inside the building

What are the two types of fire suppression operations

offensive and defensive

What happens during a blitz attack

a master stream is used for an offensive operation

What is a BLEVE

Flammable liquid vessel rupture and explosion due to external heating

What is a characteristic of a fog stream

It creates water droplets with a large surface area

What is a potential problem associated with an indirect fire attack

Displacement of hot fire gases toward the floor

What is added to propane to give it a distinct odor

Mercaptan

What is an advantage of a straight stream over a fog stream

Longer reach

What is an effect of a hose stream that consists of droplets with a large surface area

Heat absorption is enhanced

What is an indication that a hose stream has cooled ceiling-level gases

Water droplets rain down

What is the best item to aid extinguishment of smoldering fires in tightly packed combustible materials

Class A foam

What is the correct method to stop the flow of gas delivered via utility pipeline into a structure

turn off the valve at the meter

What is the correct method to stop the flow of gas into a structure supplied by an outside storage cylinder

close the valve on the cylinder

What is the minimum flow from a master stream device

350gpm (1325 lpm)

What is the minimum number of fire fighters needed to advance and maneuver a 2?" (65-mm) handline inside a building

3

What is the minimum size hose line for a vehicle fire

1 1/2" (38mm)

What is the most common hazard associated with confined spaces

Atmospheric conditions

What is the most frequently used hose line for interior attack

1 3/4" (45mm)

What is the most severe hazard associated with propane products

BLEVE

What is the objective of an indirect fire attack

Rapid cooling of the atmosphere

What is the target of the hose stream in a direct attack

The base of the fire

What is the target of the hose stream in an indirect attack

The ceiling of the fire room

What it the maximum diameter of a small handline

2" (50 mm)

When approaching a burning flammable liquid vessel to operate the valve, which combination of hose streams should be used

Two 1?" (45 mm)

When can one fire fighter safely handle a large handline

When the handline is stationary and well anchored

When directing the flow of water from the nozzle during a combination attack, where should the flow of water first be directed

Upper-left corner of the fire

When is an indirect attack indicated

When flashover is likely

When shutting down electrical service to a structure, you should

apply a lockout device

When water is converted to steam, it expands to ________ times the volume of an equivalent amount of liquid water.

1700

Where should additional equipment be staged on a high-rise fire

One or two floors below the fire

Where should streams be directed to prevent a BLEVE

At the area where the tank is being heated

Which cancer-causing material do transformers contain

Polychlorinated biphenyls

Which color are the high-voltage cables in a hybrid vehicle

Orange

Which fire-extinguishing agent would be the best choice for use on delicate electronic equipment

Carbon dioxide

Which firefighting attack, if successful, will result in the least amount of property damage

Offensive

Which hazard is of particular concern with fires involving stacked or piled material

Collapse

Which hazard presents the greatest risk for a fire in a modern vehicle

Components containing pressurized gas

Which hazardous material is commonly found in vehicle batteries

Sulfuric acid

Which item is installed on propane cylinders to allow excess pressure to escape

Relief valve

Which of the following is an example of a two-dimensional fire

Flammable liquid spill on open ground

Which of the following is another term for a deck gun

Turret pipe

Which special hazard is found on hybrid vehicles

High-voltage cables

Which statement about hydraulic ventilation is correct

A fog stream is required.

Which statement about using hose streams on an elevated transformer fire is correct

This technique may cause splashing and spread of toxic liquids.

Which statement about ventilating a basement fire is correct

Ventilation must be accomplished as soon as possible.

Which statement is correct about simultaneous offensive and defensive operations at the same building

Simultaneous offensive and defensive operations are dangerous and should not be done

Which term refers to two crews operating hose lines against each other

Opposing hose lines

Which type of attack is used when the main objective is to protect exposures

Defensive

Which type of extinguishing agent should be used on electrical equipment fires

Class C

Which type of fire attack has as its objective preventing the spread of fire

Defensive

Which type of stream is most likely to disrupt thermal balance

Fog

Why is it necessary to limit the lowest stream angle of a portable monitor

To prevent instability of the monitor