What is a correct use for a portable fire extinguisher?
Situations in which the use of water is not recommened
Which agent is rated for use on class A fires
Ammonium phosphate
For the purpose of extinguisher selection and placement, light hazard environments usually contain a limited amount of combustibles of which class
B
Which class of fire is depicted in the pictograph system by a flame and gasoline can
B
A class C agent must _______
Not conduct electricity
Which class of fire involves combustible cooking oils and fats
K
Class D agents work primarily by__________
Forming a crust over the fuel
What residue does a CO2 fire extinguisher leave when discharged
None
For an extinguishing agent to be rated for a particular class of fire, it must _______
Prevent rekindling
The weight of carbon dioxide is about ______ the weight of air
One and a half times .... 1.5
What does a rating of 40 on a class B extinguisher mean
Sufficient extinguishint power for 40 square feet of burningfuel
A portible fire extinguisher is bested suited for which situation
Fire in a wastebasket
What does it mean when a fire extinguisher has a pictograph with a red slash through it
Use on that class of fire could be hazardous
Which motion best accomplishes the removal of the pin and tamper seal from a portable extinguisher
Twisting motion
Which extinguishing agent is suitable for ise on a class C fire
Carbon dioxide
What is the most commonly used extinguishing agent for class A fires
Water
When should a dry chemical extinguisher should be serviced and recharged
After any discharge
What is the best way to extinguish a class C fire
Shut off the power and treat it as a class A or B fire
Dry chemicals extinguishers may be used on class C fires because they_________
Do not conduct electricity
Class B foam extinguisher is NOT rated for which fuel
Cooking oil
Which statement about the numerical rating of a class K extinguisher is correct
There is no numerical rating for a class K
Class A fire extinguisher with a numerical rating of 2 contains ______ gallons of water
2.5
What is one disadvantage of CO2 extinguishers
Short discharge range
For the purpose of fire extinguisher placement, what is the relationship between occupancy use category and hazard classfication
They are not necessarily related
Ordinary combustibles ??
Class A Green Triangle
Flammable liquids??
Class B Red Square
Electrical equipment??
Class C Blue Circle
Combustible metals
Class D Yellow Star
Class A
Trash can
Class B
Gas can
Class c
Electrical
Class K
Frying pan
Portable fire extinguisher components
Container that holds the agent
Carrying handle
Nozzle
Trigger & discharge valve
Locking mechanism
Pressure indicator
PASS
Pull
Aim
Squeeze
Sweep
NFPA 10
STANDARD FOR PORTABLE FIRE EXTINGUISHERS
Which class of fire is depicted in the pictograph system by a fire in a frying pan?
K
Which class involves combustible metals?
D
Which hazard category includes automotive service or repair facilities?
Extra
What is the primary extinguishing mechanism of dry chemical agents?
Interrupting the chemical chain reaction
The "P" in the acronym PASS, used in reference to fire extinguisher operations, stands for ________
Pull
What is the term for the substance that pults out the fire?
Extinguishing agent
Which statement about dry chemical agents is correct?
Dry chemical agents are not subject to freezing
The use of Halon 1211 is strictly controlled because it is _____________
Harmful to the environment
All fire extinguishers are classified according to ___________
The classes of fire on which they are effective
Which class of fire extinguisher includes a number in its classification?
A
The traditional symbol for a class D fire extinguisher is a(n) ________
Yellow star