更多"CO2 extinguishes a fire by（）."的相关试题:
[单项选择]Halon extinguishes fire primarily by（）.
A. cooling
B. smothering
C. shielding of radiant heat
D. breaking the chain reaction
[单项选择]CO2 extinguishes a fire by （）.
A. a blanket of bubbles formed on the surface of the fire
B. smothering
C. cooling
D. isolating the heat from the fuel
[单项选择]Foam extinguishes a fire by（）.
A. shutting off the air supply
B. cooling the fuel to below ignition temperature
C. dispersing the fuel
D. removing the source of ignition
[单项选择]Halon extinguishes a fire by（）.
A. breaking the chain reaction
B. smothering the fire
C. cooling the fire
D. coating the fule with a nonflammable surface
[单项选择]C02 extinguishes a fire by（）.
A. cooling
B. smothering
C. chemical action
D. All of the above
[单项选择]Foam extinguishes a fire mainly by（）.
A. cooling
B. chemical action
C. smothering
D. inerting the air
[单项选择]After extinguishing a fire with CO2，it is advisable to（）.
A. use all CO2 available to cool the surrounding area
B. stand by with water or other agents
C. thoroughly ventilate the space of CO2
D. jettison all burning materials
[单项选择]The fire extinguishing action of CO2 comes mostly from （）.
A. breaking the fire chemical chain reaction
B. smothering
C. cooling
D. isolating the heat from the fuel
[单项选择]Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
A. the CO2 being inhaled by personnel
B. reflash of burning liquids
C. vapor condensation on the extinguisher
D. the discharge causing a static spark
[单项选择]How do you operate a portable CO2 fire extinguisher?（）.
A. Point the horn down
B. Turn cylinder upside-down
C. Break the rupture disc
D. Pull pin，squeeze grip
[单项选择]If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）
A. Dry chemical
B. Halon
C. Low velocity fog
D. Steam
[单项选择]To determine if a CO2 fire extinguisher is fully charged，you would（）.
A. Operate the trigger valve
B. Weigh the extinguisher
C. Test with a pressure gauge
D. Read the date of last test
[填空题]CO2气体保护焊分为（）CO2气体保护焊和（）CO2气体保护焊两种。
