A、Oxygen deficient spaces
B、Compartments containing poisonous vapors
C、Fighting fires that produce heavy smoke
D、Underwater search
更多“The self-contained breathing device should not be used in which situation?（）”相关的问题
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、A.a gas mask certified by the Mine Safety and Health Administration B、B.the same self-contained breathing apparatus required with the fireman's outfit C、C.an oxygen breathing apparatus，provided that the device has been inspected within three years D、D.a portable ventilation system that will provide a complete change of air every three minutes
A、pressure differences in the atmosphere B、the length of the hose attached to the facepiece C、the physical exertion of the person wearing the device D、spaces containing poisonous vapors
A、Oxygen deficient spaces B、Compartments containing poisonous vapors C、Fighting fires that produce heavy smoke D、Underwater search
A、flashlight B、combustible gas indicator C、self-contained breathing apparatus D、fire axe
A、A.a centrifugal fan B、B.a direct expansion cooler C、C.a hermetic compressor D、D.a centrifugal pump
A、make underwater repairs to barges B、determine if the air in a tank is safe for men C、enter areas that may contain dangerous fumes or lack oxygen D、resuscitate an unconscious person
A、make underwater repairs to barges B、determine if the air in a tank is safe for men C、enter areas that may contain dangerous fumes or lack oxygen D、resuacitate an unconscious person
A、control the pressure of the oxygen as it enters the body B、allow the wearer to manually give himself oxygen C、release excess heat which would otherwise cause the bottle to explode D、allow exhaled gases to pass outside the bottle
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