Cooling ability
Leaves no residue
Penetrating power
Nonconductivity
第1题:
All portable fire extinguishers must be capable of being ______.
A.carried by hand to a fire
B.carried or rolled to a fire
C.recharged in the field
D.used on class “B” fire
第2题:
Alcohol foam
Dry chemical
Chemical foam
Water fog
第3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4题:
six weeks
six months
twelve months
two years
第5题:
acrylic acid
benzene
oleum
vinyl toluene
第6题:
第7题:
Dry chemicals
CO2
Foam
All the above
第8题:
Halogenated hydrocarbon, Halon in short form,is used on board ship as ________ .
A.fire-extinguishing medium
B.a standard fire test
C.a non-combustible material
D.a fire main
第9题:
preventing oxygen from reaching the burning material
cooling the burning material below its ignition temperature
using the extinguishing agent to make the burning material fire-resistant
using the extinguishing agent to absorb the heat
第10题:
Class A and class B
Class B and class C
Class A and class C
Class C, class D, and class E