更多"As an extinguishing agent,foam()."的相关试题:
[单项选择]As an extinguishing agent,foam().
A. conducts electricity
B. should be directed at the base of the fire
C. is most effective on burning gases which are flowing
D. extinguishes by cooling oil fires below ignition temperature
[单项选择]Which extinguishing agent is effective in combating an isoprene fire?()
A. Dry chemicals
B. CO2
C. Foam
D. All the above
[单项选择]An extinguishing agent which effectively cools,dilutes combustible vapors,removes oxygen,and provides a heat and smoke screen is().
A. carbon dioxide
B. Halon 1301
C. dry chemical
D. water fog
[单项选择]Which extinguishing agent will cool down a heated bulkhead in the least amount of time?()
A. Water stream
B. Water fog or apray
C. Steam
D. Dry chemical
[单项选择]Which fire extinguishing agent has the greatest capacity for absorbing heat?()
A. Water
B. Foam
C. Dry chemical
D. Carbon Dioxide
[单项选择]Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?()
A. Alcohol foam
B. Dry chemical
C. Chemical foam
D. Water fog
[单项选择]Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?()
A. Foam
B. Carbon dioxide
C. Dry chemical
D. Water fog
[单项选择]Water is a very effective fire extinguishing agent because it()
A. will remove all the toxic fumes from the air
B. has the greatest cooling ability
C. will leave no harmful residue
D. completely removes combustible vapors from the air
[单项选择]Which fire extinguishing agent can NOT be used on an ethylenediamine?()
A. Water foam
B. Dry chemical powder
C. Water fog
D. Alcohol foam
[单项选择]Which extinguishing agent is most effective on a mattress fire?()
A. CO2
B. Foam
C. Dry Chemical
D. Water
[单项选择]Any extinguishing agent used on a Class C fire must have which important property?()
A. Cooling ability
B. Leaves no residue
C. Penetrating power
D. Nonconductivity
[单项选择]Which extinguishing agent is the best for use on electrical fires?()
A. Foam
B. CO2
C. Dry chemical
D. Water fog
[单项选择]Which extinguishing agent is best for use on a magnesium fire?()
A. Water
B. Sand
C. CO2
D. Dry chemical
[单项选择]Any extinguishing agent used on a Class “C” fire must have which important property? ()
A. Cooling ability
B. Leaves no residue
C. Penetrating power
D. Nonconductivity
[单项选择]Where foam extinguishing systems are provided on a ship,each machinery flat in the protected space must have a(n)().
A. coaming
B. alarm
C. drain
D. fire sensor
[单项选择]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
[单项选择]0ne of the limitations of foam as an extinguishing agent is that foam().
A. cannot be made with salt water
B. is heavierthan oil and sinks below its surface
C. is corrosive and to fire fighters
D. conducts electricity
[单项选择]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
[单项选择]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