it provides cooling as a secondary effect
works well on extinguishing electrical fires
can be used to combat combustible metal fires
All of the above
第1题:
The most effective way to apply a foam stream if the fire is on deck or is a runing fire, is to direct the stream ______.
A.onto the surface of the burning liquid
B.ahead of the burning liquid and bounce it on the fire
C.at the base of the burning liquid in a sweeping motion
D.just above the surface of the burning liquid
第2题:
As an extinguishing agent, foam ______.
A.conducts electricity
B.should be directed at the base of the fire
C.is most efffective on buring gases which are flowing
D.extinguishes by cooling oil fires below ignition temperature
第3题:
A.to
B.up
C.with
第4题:
第5题:
Foam is a very effective smothering agent and ______.
A.it provides cooling as a secondary effect
B.works well on extinguishing electrical fires
C.can be used to combat combustible metal fires
D.All of the above
第6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7题:
Firefighting foam is only effective when the foam _____.
A.penetrates to the bottom of the fire
B.is kept saturated with low-velocity water fog
C.mixes with the burning fuel oil
D.completely covers the top of the burning liquid
第8题:
One of the limitations of foam as an extinguishing agent is that foam ______.
A.cannot be made with salt water
B.is heavier than oil and sinks below its surface
C.is corrosive and a hazard to fire fighters
D.conducts electricity
第9题:
第10题:
IBM Global Mirror is based on which of the following very effective copy services functions()