greater range
effectiveness on all types of fires
cleanliness
All of the above
第1题:
______, as the chemical extinguisher agent, should be used for an electric fire.
A.dry chemical or foam
B.foam or soda acid
C.carbon dioxide or foam
D.carbon dioxide or dry chemical
第2题:
An advantage of a dry chemical over a carbon dioxide fire extinguisher is its ______.
A.greater range
B.effectiveness on all types of fires
C.cleanliness
D.All of the above
第3题:
Which of the following is (are)an advantage of a dry chemical extinguisher over a carbon dioxide extinguisher?The dry chemical extinguisher:Ⅰ.Has a greater range.Ⅱ.Provides a heat shield for the operator.
A.Ⅰonly
B.Ⅱonly
C.Both Ⅰand Ⅱ
D.Neither Ⅰ nor Ⅱ
第4题:
Alcohol foam
Dry chemical
Chemical foam
Water fog
第5题:
As compared to carbon dioxide, dry chemical has which advantage? ______.
A.Cleaner
B.Effective on metal fires
C.Greater range
D.More cooling effect
第6题:
An ABC dry chemical fire extinguisher would be LEAST effective against a fire in ______.
A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can
第7题:
An advantage of an ABC dry chemical over a carbon dioxide fire extinguisher is ______.
A.lack of toxicity
B.the multipurpose extinguishing ability
C.burn-back protection
D.cooling ability
第8题:
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______.
A.Forming a cloud cover over the flames
B.Directing the gas at the base of the flames in a slow sweeping motion
C.Discharging the carbon dioxide into the heart of the flames
D.Bouncing the discharge off an adjacent bulkhead just above the burning surface
第9题:
An engine compartment gasoline fire requires which type of extinguisher?______.
A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above
第10题:
Batten down the engine room
start the fire pump
apply carbon dioxide to the fire
shut off the fuel supply