更多"C02 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]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]Foam extinguishes a fire mainly by（）.
A. cooling
B. chemical action
C. smothering
D. inerting the air
[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]After extinguishing a fire with C02,it is availabe to（）.
A. use all CO2 available to cool the surronding area
B. stand by with water or other agents
C. thoroughly ventilate the space of CO2
D. jettison all buring materials
[单项选择]To determine if a C02 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
[单项选择]You can determine that a C02 fire extinguisher is fully charged by（）.
A. looking at the gage
B. checking the nameplate data
C. weighing by hand
D. weighing on a properly calibrated scale
[单项选择]How do you operate a portable C02 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]In order to discharge a C02 portable fire extinguisher , the operator must first（）.
A. invert the CO extinguisher
B. squeeze the two trigger handles together
C. remove the locking pin
D. open the discharge valve
[单项选择]C02钢瓶中液态和气态C02分别约占钢瓶容积的（）
A. 80％和20％
B. 20％和80％
C. 40％和60％
D. 60％和40％
[单项选择]采用C02气体保护焊进行焊接时，C02气体在电弧高温下（）。
A. 不分解
B. 全部分解为C0和02
C. 部分分解为C0和02
D. 全部分解为C和02
[单项选择]C02是（）
A. 混合物
B. 单质
C. 纯净物
D. 盐
[单项选择]Fire dampers prevent the fire spreading through the process of （）.
A. convection
B. conduction
C. radiation
D. direct contact
