Portable Fire Extinguishers Flashcards
Foam extinguishers are recommended for
a) Class “A” and Class “B” fires
b) Class “A” and Class “C” fires
c) Class “C” and Class “B” fires
d) all classes of fires
e) all but burning liquids
a) Class “A” and Class “B” fires
The background symbol used on a fire extinguisher for a Class "D" fire is a a) green triangle b) green circle c) red square d) blue circle e) yellow star
e) yellow star
Rating numerals to indicate the effectiveness of an extinguisher are used in reference to a) Class A fires b) Class B fires c) Class C fires d) Class A and B fires e) Class A, B, and C fires
d) Class A and B fires
One type of extinguisher suitable for extinguishing all four classes of fires is the a) Halon extinguisher b) foam extinguisher c) dry chemical extinguisher d) carbon dioxide extinguisher e) none of the above
e) none of the above
A “loaded stream” extinguisher is one which
a) can be used on Class B fires
b) has an antifreeze agent
c) is always under stored pressure
d) is meant for Class C fires
e) produces foam
b) has an antifreeze agent
A major disadvantage of a floor standing pump extinguisher
over a backpack pump unit is
a) the floor unit has only half the capacity
b) the backpack unit has twice the range
c) pumping must stop for relocation
d) the floor unit pump is single acting
e) the floor unit is too difficult to move
c) pumping must stop for relocation
Pressure range in a carbon dioxide extinguisher is
a) 31 to 55 kPa
b) 5.6 to 6.3 Mpa
c) 5,600 to 6,300 Mpa
d) 31 to 55 Mpa
e) 56 to 63 psi
b) 5.6 to 6.3 Mpa
The maximum storage temperature for a carbon dioxide extinguisher is a) 31 degrees C b) 25 degrees C c) 40 degrees C d) 45 degrees C e) 55 degrees C
e) 55 degrees C
Carbon dioxide extinguishers
a) are self-expelling
b) are the best for Class A fires
c) are the quietest in operation
d) present no hazards during use
e) are the most difficult to use
a) are self-expelling
Halon agents are
a) safe until they make contact with the combustion process
b) themselves toxic
c) the most highly recommended for Class B:C use
d) able to maintain cylinder pressure themselves regardless
of temperature
e) gradually replacing dry powder units
b) themselves toxic
An extinguisher with a 4 rating is
a) good for Class C fires only
b) twice as effective as a unit with a 1 rating
c) not to be used on a Class A fire
d) four times as effective as a unit rated 1
e) good for four minutes of use
d) four times as effective as a unit rated 1
Foam type fire extinguishers achieve best results by
a) lobbing the foam over top of the fire
b) bouncing the foam off the floor just in front of the
burning area
c) discharging the agent with a sweeping motion
d) discharging the agent at the base of the flame
e) splashing the agent into the burning liquid
b) bouncing the foam off the floor just in front of the
burning area
All maintenance work done on portable fire extinguishers is
required to be
a) completed on all extinguishers in the plant at the same
time
b) performed at the worksite in case they are required for
emergency service
c) contracted out to a certified service company
d) supervised by a National Fire Protection Association
employee
e) performed on an as-needed basis
c) contracted out to a certified service company
Halon agent extinguishers are operated and applied in the same manner as a a) carbon dioxide extinguisher b) water extinguisher c) dry chemical extinguisher d) foam extinguisher e) dry powder extinguisher
a) carbon dioxide extinguisher
Halon extinguishers are mostly intended for use on
a) Class A fires
b) Class B fires
c) Class C fires
d) Class A and B fires
e) Class B and C fires
e) Class B and C fires
