A、在进入封闭舱室之前，戴上氧气面罩。
B、在进入封闭舱室之前，戴上呼吸阀。
C、在进入封闭舱室之前，戴上透气孔。
D、在进入机舱室之前，戴上氧气面罩。
更多“Wear the breathing apparatus before entering an enclosed space.（）”相关的问题
A、take shallow breaths of air B、ventilate the area C、wear a breathing apparatus while working D、keep a charged fire hose handy
A、A.Liner wear is distributed equally between the upper and lower portions of the cylinder B、B.Excessive liner wear causes wear between piston ring and groove C、C.Excessive, but uniform liner wear will not cause wear between piston ring and groove D、D.Liner wear is normally greatest in the middle of the cylinder
A、weigh you down B、preserve body heat C、reduce your body heat D、make it more difficult to breathe
A、A.weigh you down B、B.preserve body heat C、C.reduce your body heat D、D.make it more difficult to breathe
A、you are entering a space containing poisonous vapors B、you are entering a space containing explosive gases C、the regulator of the breathing apparatus malfunctions D、the face piece of the breathing device is too tight
A、Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation B、Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas C、Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas D、This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
A、They should wear safety shoes B、They should wear ear protection C、They should not wear jewelry D、All of the above
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