Chapter 7: Portable extinguishers (video questions)
What are TWO significant concerns that firefighters should warn citizens about when training citizens to use carbon dioxide extinguishers?
1. They make a very loud noise 2. They can freeze your hand
Which of the following agents could be in a water-type extinguisher?
1. Water 2. Antifreeze 3. Foam 4. Loaded-Stream
The "accessibility" of a fire extinguisher is determined by checking that the?
1. extinguisher is easily accessible 2. extinguisher is in the correct location 3. operating instructions on the extinguisher faceplate are easy to read
If an extinguisher is rated 1-A, it has?
1.25 gallons or 4.7 liters of water
If a carbon dioxide extinguisher's weight is deficient by more than BLANK, it should be removed from service and recharged?
10 percent
Carbon dioxide extinguishers are limited to a range of?
3 to 8 feet or 1 to 2.4 meters
A Class B extinguisher with a 40-B indicates the capacity to extinguish an area about?
40 square feet to 3.7 square meter
There are BLANK bacis types of portable extinguishers?
7 water water mist carbon dioxide halogenated or "clean agent" dry chemical wet chemical dry powder
When using a stored-pressure foam fire extinguisher on a iquid fire, how far should you be from the fire when you being the attack?
A safe distance
What do the letters AFFF stand for when referring to fire extinguishers?
Aqueous Film-Forming Foam
When should civilians call the fire department?
Before attempting to extinguish a small fire
When approaching a fire, the exit route should always be?
Behind you
Who is requried to keep record of fire extinguishers mainteance for a building?
Building owner or occupant
Combustible metal fires, involving aluminum, magnesium, and sodium are classified as BLANK fires?
Class D
BLANK fires involve combustible animal or vegatable fats and cooking oils used in commerical cooking equipment?
Class K
Class D fires invloce?
Combustible metals such as aluminum, magnesium, tatanimum, lithium, sodium and potassium
When using a stored-pressure water extinguisher?
Direct the water stream at the base of the flames
If bouncing the foam off the floor in front of the flame or off a vertical surface behind the flame is not an option?
Discharge at distance and lob the stream in an arc
To use a dry powder extinguisher on a Class D fire, you would being by?
Discharging the agent with the nozzle fully open
Aim the extinguisher nozzle towards the fire from a safe distance as shown on the?
Faceplate
Where should you look for the classification and rating of a fire extinguisher?
Faceplate
An extinguisher shold be classified and rated for only one type of fire; multiple ratings are not permissible. True or False?
False
Any extinguishers with a minimum weight shown on the faceplate, which does not meet the weight requirements, should be permanently removed from service and replaced. True or False?
False
Carbon dioxide extinguishers are effective with Class C and Class D fires. True or False?
False
Class D Extinguishing Agents must be applied by hand. True or False?
False
Foam extinguishers look like stored-pressure type water extinguishers, but the difference is that they have BLANK in the tank. They also have a special nozzle that mixes air with the solution making the discharge a foam insted of a liquid?
Foam concentrate as well as water
Carbon dioxide extinguishers create a discharge that can cause?
Freeze burns
When using a stored-pressure water extinguisher sweep the nozzle back and forth, BLANK as the fire goes out?
Moving closer
Fire extinguishers require maintance at least?
Once a year
Class A fire involve?
Ordinary combustibles such as paper, wood, cloth and many plastics
Carbon dioxide extinguishers put out a fire by taking away the BLANK needed for combustion?
Oxygen
The general operating instructions for most portbale fire extinguishers follow the letters
PASS P: Pull A: Aim S: Squeeze S: Sweep
The extinguishing agent in a dry chemical extinguisher comes out as a ?
Powdery stream
The best way to determine wheather employees or other occupants are able to operate fire extinguishers is to?
Train the occupants who may be first on the scene
All water-type extinguishers can be used on Class A fires?
True
Cartridge-operated dry chemical extinguishers require the agent tank to be pressurized before the chemical can be discharged. True or false?
True
Checking to see if a fire extinguisher is ready for service means you should note that the last date of inspection and maintenance, examine it for tampering, and look for damage or dirt that might impair its operation. True or False?
True
Dry chemical extinguishers are the most common portbale fire extinguishers in use today. True or False?
True
Dry powder or Class D extinguishers are suitable for fighting fires involving combustible metals. True or False?
True
Electronic monitoring is an alternative to monthly manual inspections for some extinguisherss. True or False?
True
Extinguishers that use an ammonium phosphate-based agent can be used on Class A, Class B and Class C fires. True or False?
True
Maintenance of portable fire extinguishers is the primary responsibility of the extinguishers owner. True or False?
True
Which type of extinguisher would best be used to put out a cooking oil fire?
Wet chemical
Both halon and halocarbon agents put out fire by?
interuppting the chemical chain reaction needed for combustion
The factors that determine the potential effectiveness of a fire extinguisher are?
1. Accessibility 2. Serviceability 3. Ability to operate
In addition to the letter classification, Class BLANK extinguishers recieve a numerial rating?
1. Class A 2. Class B
A multipurpose, or ABC extinguisher can be used on?
1. Ordinary combustibles 2. Flammable liquids 3. Energized electrial equipment
What should a firefighter wear when attacking a fire with a portbale fire extinguisher?
1. PPE 2. Appropriate respiratoey equipment
Which of the following is NOT a common type of portable, hand-held fire extinguisher?
Carbon monoxide
Which type of dry chemical extinguisher has a separate unpressurized agent tank and pressurized cylinder?
Cartridge-operated type
Multipurpose dry chemical extinguishers are used for which of the following classes of fires?
Class A, Class B and Class C
BLANK fires are defined as fires involving flammable and combustible liquids such as gasoline, petroleum oils, alcohols and gases?
Class B
On which of the following classes of fires are ordinary dry chemical extinguishers used?
Class B and C
Carbon dioxide extinguishers can be used on?
Class B and C fires. They put the fire out by displacing the oxygen and replacing it with an inhert gas
BLANK fires are defined as fires involving energized electrical equipment such as household appliances, coumputers and tranformers.
Class C
When applying Class D Fire extinguishing agents, carefully scrape away any crust that may have formed on the burning metal so you can get the agent to the heat of the fire. True or False?
False, when applying class D agents be careful to keep intact any crust that may have formed
Never bounce the foam off the floor in front of the fire flame. True or false?
False
Only a small amount of extinguising agent is needed to fight Class D fire. You should avoid applying the agent too thickly; this will make disposal of the material eaiser once the fire is out. True or False?
False
Stored-pressure foam fire extinguishers should never be used on a liquid fire. True or False?
False
To operate the stored-pressure type dry chemical extinguisher, you must press down on the activation plunger and wait a couple seconds for the agent tank to pressurize. True or False?
False
Water mist extinguishers use distilled water dispersed in a fine mist to remove heat. They are primarily used for Class B fires, although some are safe for use on Class C fires. True or False?
False
The general operating instructions for hand-held fire extinguishers follow the sequence: Pull, Aim, Swueeze and Sweep. True or False?
True
When lifiting heavy extinguishers, always lift with your legs and not your back. True or False?
True
When using a carbon dioxide extinguisher on a flammable liquid fire, it is best to sweep the flame from the burning surface, starting at the near edge of the fire moving foward. True or False?
True
When using a cartride-operated dry chemical extinguisher, you must press down on the activation plunger and?
Wait a couple of seconds for the agent tank to pressurize
After you have used a hand-held extinguisher on a small fire and the flames have been extinguished, what should you do?
Wait and watch for hot spots
The classification of fire extinguishers corresponds with the?
five clasess of a fire
Extinguishers listed as "obsolete" by NFPA 10 must be?
replaced
Class B extinguisher with a 10-B indicates the capacity to extinguish an area about?
10 square feet to 1 square meter
When carrying a stored-pressure water extinguisher to the fire, carry it with the handle on the valve in one hand and the hose clipped securely to the tank. True or False?
False, carry it with the carry handle on the valve in one hand and the hose in the other hand
On Class B fires, foam extinguishing agents remove the heat element from the fire tetrahedon. True or False?
False, on class b fires foam agents deparate the oxygen from the other elements by creating a foam blanket that floats on top of fuel. Class A fires, form extinguishing agents remove the heat element from the tetrahedron
When using a stored-pressure foam fire extinguisher gradually apply the discharge to blanket the entire surface of the burning liquid with foam. True or false?
True
When using a storied-pressure foam fire extinguisher on a liquid fire, first make sure the fuel source has been shut off before you begin your attack. True or False?
True
A typical Class 2-A extinguisher can extinguish how much more Class A fuel than a 1-A rated extinguisher?
Twice as much
