Fire Extinguishers GTCC

What are 2 types of ABC rated extinguishers?

Ordinary or Multipurpose

Minimum size ratings for extinguishers in an occupancy is

2:A 10:B C

3 common extinguisher rating combinations

ABC - dry chemical BC. dry chemical or CO2 AB. AFFF extinguishers water mist extinguishers rated AC

Class C fires are represented by what color and shape

Blue / Circle

The letter(s) in the rating indicate:

Class(es) of fire extinguisher is best suited for use on

Class K fires are those that involve:

Combustible Cooking Oils Vegetable or Animal Fat

What NFPA Standard is referenced for portable fire extinguishers

NFPA 10

3 operating principles of extinguishers

- stored internal pressure (most common) - manual pump - pressure cartridge

Factors used to determine proper extinguisher:

-hazards to be protected -potential severity of fire -atmospheric conditions -personnel available -ease of handling -life hazards -operational concerns

A 10 "B" rated extinguisher would have the potential to extinguish ____ square feet of class B fire

10 square feet

A 20:B extinguisher will extinguish ______ times as much fire as a 2:B.

10 times

Extinguishers required on pumping apparatus by NFPA 1901

2 extinguishers suitable for Class B & C fires Dry Chem at least 80B:C CO2 at least 10 B:C 1: 2.5 gallon or larger water extinguisher for use on class A fires

An expert trained in the proper use of an extinguisher can expect _____ times more fire extinguisher potential

2.5

How much water is in a "Water Can", and what is the rating?

2.5 gallons of water rating is 2A

How Many Classes Of Fires Are There?

5

Maximum travel distance for an extinguisher in an occupancy is

75 feet for normal hazards 50 feet for higher hazards

Water mist extinguishers are rated for Class _____ & ______ fires and use ____________ water.

A & C fires deionized water

Multipurpose dry chemical extinguishers are rated for which classes of fires

A B & C

What is an AFFF extinguisher and which classes of fire is it rated for?

Aqueous Film Forming Foam used on Class A or Blue fires only

Carbon Dioxide or CO2 Extinguishers are rated for which classes of fire

B & C

Class K fires are represented by which color and symbol

Black Hexagon

Which class of fire are ordinary combustibles? Give some examples

Class A Examples: Wood/Paper/Plastics / Rubber / Textiles

Energized electrical equipment is which class of fire?

Class C

Dry powder extinguishers are used for Class ___ Fires ONLY

D

Combustible metals comprise class ____ fires and are represented by which color and shape

D. yellow/star

Class B fires are

Flammable liquids, greases, and gases. Examples: diesel fuel/kerosene/gasoline / propane

Class A Fires are represented by which color and symbol

Green / Triangle

Obsolete Extinguishers

Inverting Soda Acid Carbon Tetrachloride loaded stream Extinguishers using rivets or solder copper or brass

A slash through a picture on an extinguisher would mean

It cannot be used on that class of fire. IT WILL CAUSE INJURY

Explain the extinguisher rating of: 2A10BC

It is rated for use on Class A,B, or C fires It has 2.5 gallons of water or the equivalent. It will extinguish 10 square feet of Class B fuels It does not conduct electricity

How can you tell the readiness of a CO2 extinguisher?

It must be weighed

Name some features that distinguish a CO2 extinguisher from other types

No Pressure Guage Large horn or nozzle on hose

What acronym is used to describe the operating principle of a fire extinguisher

PASS Pull/Aim/Squeeze/Sweep

Class B fires are represented by which color and symbol?

Red / Square

Name 4 mechanisms by which extinguisher agents extinguish a fire

Smothering Cooling Chain Breaking Soponification

A "1A" rated extinguisher means:

The A rating is a water equivalency rating. Each A is equivalent to 1 1/4 gallons of water. 4A = 5 gallons of water.

Why would an extinguisher receive a class C rating?

The agent inside DOES NOT conduct electricity. CLASS C AGENTS DO NOT HAVE A NUMERICAL RATING ASSOCIATED WITH THEM

Examples of Class D or combustible metal fires are

Titanium /Zirconium/Magnesium End in -ium

An extinguisher is rated using numbers and letters? True or False

True

A typical "water can" would need to be protected from freezing? T/F

True should be kept above 40 degrees [antifreeze additives should only be placed by a qualified professional]

Agency responsible for testing and rating of fire extinguishers

UL

_________ applied to a Class D fire, results in a _________ reaction spattering molten material and spreading the fire

Water Violent

Fires involving Class C materials should be ________________ first.

deenergized / unplugged

Carbon dioxide extinguishers:

displace oxygen discharge temperature of -110 degrees 450:1 expansion ratio by

Always have an identified __________ ____________. Stay between the _______ and the _________

escape route fire and exit

Things to inspect on an extinguisher immediately before use

external condition hose / nozzle weight pressure guage appropriate agent based on fuel burning

The number(s) in an extinguisher rating represent

extinguishment potential

Portable extinguishers are intended to be used on small fires in the __________ or ________ _________ phase

incipent or early growth

What are typical inspection/test intervals for extinguishers?

inspected monthly by owner/employees 1 time a year by licensed professional After each use Damage is suspected 6 year maintenance cycles other hydrostatic testing based on type

extinguisher inspection continued

is the extinguisher full (guage or weight) inspection tagged no more than 1 year condition of extinguisher and hose

Types of damage and extinguisher could sustain:

leakage corrosion damaged shell or cylinder leaking hose leaking gaskets nozzle damage loose labels

If fixed fire suppression system has been activated such as halon or FM-200 what should responders consider?

low oxygen levels and the use of SCBA if entry to these areas occurs

Fires involving wood paper cloth and plastics are ___________ _____________, or Class ______.

ordinary combustibles. Class A

Things to include in an extinguisher inspection:

proper location and accessible discharge nozzle or horn for damage or obstructions shell for physical damage operating instructions are legible locking pin & tamper seal present

Extinguishers are marked using __________ and _________ to help identify classes of fire that it's rated for

shapes and colors

Approach the fire from the ____________ and ____________ sides

uphill and windward

Class K fires are extinguished using _______________ extinguishers

wet chemical

3 tests for Class A fires

wood panel wood crib excelsior