A.leave the access door partially open
B.enter from the lowest level
C.enter from the highest level
D.attempt to operate machinery
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A.unburned carbon particles
B.excess nitrogen
C.a lack of oxygen
D.excess hydrogen
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
A.Hydraulic oil
B.Lubricating oil
C.Diesel oil
D.Refrigeration oil
A.CO2
B.ABC dry chemical
C.CO2 propelled foam
D.All of the above
A.CO2
B.Foam
C.Water fog
D.Soda acid
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