更多"Class C fires are best extinguished"的相关试题:
[单项选择]Class B fires are best extinguished by smothering, i-e（）.
A. deprival of oxygen
B. removal of heat
C. spraying of water
D. injecting of soda-acid
[单项选择]Class A fires are best extinguished by quenching or cooling with （）.
A. deprival of oxygen
B. a water spray
C. soda-acid
D. foam
[单项选择]Oil fires are best extinguished by（）.
A. cutting off the supply of oxygen
B. removing the fuel
C. cooling below the ignition temperature
D. spraying with water
[单项选择]Fire extinguishing agents used on Class C fires must be（）.
A. able to absorb heat
B. water based
C. nonconducting
D. nontoxic
[单项选择]Triethylene glycol fires may be extinguished by（）.
A. dry chemical
B. alcohol foam
C. carbon dioxide
D. All of the above
[单项选择]0il fires are best extinguish by（）.
A. cutting off supply of oxygen
B. removing the fuel
C. cooling below the ignition temperature
D. spraying with water
[单项选择]Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
A. closing the compartment except for the ventilators
B. completely closing the compartment
C. leaving the compartment open to the air
D. increasing the air flow to the compartment by blowers
[单项选择]A large oil fire is best extinguished with（）
A. soda acid
B. foam
C. CO2
D. sand
[单项选择]The best method of extinguishing a class A fire is to （）.
A. remove oxygen from the area
B. smother fire with foam
C. smother fire with CO2
D. cool fuel below ignition temperature
[单项选择]Flames from small leaks of LFG may be extinguished by（）.
A. utilizing carbon dioxide or dry chemical fire extinguishers
B. utilizing soda and acid fire extinguishers
C. blowing the flames out
D. letting it burn itself out
[单项选择]A fire can be extinguished by removing （）.
A. the heat
B. the fuel
C. the oxygen
D. any of the above
[单项选择]After a fire has been extinguished in a closed space, personnel may safely enter the space when （）.
A. smoke density has been decreased sufficiently to see the bulkhead opposite the compartments entrance
B. a lifeline and explosion proof flash light are used
C. all smoke and toxic fumes are removed and an adequate oxygen supply is present
D. overhaul has been completed to remove any possible source of re-ignition
[单项选择]When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.
A. air from contacting the oil vapors
B. permitting re-ignition boiling of the heated oil
C. spontaneous combustion below the oil surface
D. toxic fumes from escaping to the surface
[单项选择]Fires involving combustible metals are classified as （）.
A. class "A" fires
B. class "B" fires
C. class "C" fires
D. class "D" fires
[单项选择]GPRS服务类型有CLASS A、CLASS B、CLASS C三种：（）在上网的时候会将电话功能屏蔽，当有电话进来的时候自动切断网络；（）可以同时使用网络和电话功能；（）则是单纯的网络应用， 不提供电话功能。
A. CLASSB；CLASSA；CLASSC
B. CLASSA；CLASSB；CLASSC
C. CLASSC；CLASSB；CLASSA
D. CLASSC；CLASSA；CLASSB
[单项选择]Fires resulting from spontaneous combustion are usually caused by the improper disposal of（）.
A. cigarette butts
B. oily rags
C. burner torches
D. lighted matches
[单项选择]To avoid scavenge fires occurring the engine timing and equipment maintenance （）.
A. should be correctly carried out
B. should correctly be taken place
C. should carded with care
D. must to carry out with great care
