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
更多“A self-contained breathing apparatus is used to（）.”相关的问题
A、Oxygen deficient spaces B、Compartments containing poisonous vapors C、Fighting fires that produce heavy smoke D、Underwater search
A、Oxygen deficient spaces B、Compartments containing poisonous vapors C、Fighting fires that produce heavy smoke D、Underwater search
A、chemical protection face shield B、approved work vest C、self-contained breathing apparatus D、marlinspike
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、A.chemical protection face shield B、B.approved work vest C、C.self-contained breathing apparatus D、D.marlinspike
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、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、canister-type gas mask B、fresh-air breathing apparatus C、self-contained breathing apparatus D、combustible gas indicator
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