單項選擇題

When reentering an engine room that has been flooded with CO₂, the investigating team should initially（）.

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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單項選擇題

If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of （）.

A.unburned carbon particles
B.excess nitrogen
C.a lack of oxygen
D.excess hydrogen

單項選擇題

After a fire has been extinguished in a closed space, personnel may safely enter the space when （）.

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

When reentering an engine room that has been flooded with CO2, the investigating team should initially（）.

你可能感興趣的試題

If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of （）.

After a fire has been extinguished in a closed space, personnel may safely enter the space when （）.

When reentering an engine room that has been flooded with CO₂, the investigating team should initially（）.