單項(xiàng)選擇題After extinguishing a fire with C02,it is availabe to（）.

A.use all CO2 available to cool the surronding area
B.stand by with water or other agents
C.thoroughly ventilate the space of CO2
D.jettison all buring materials


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你可能感興趣的試題

1.單項(xiàng)選擇題After putting on a self-contained breathing apparatus, you open the air supply and hear a continuous ringing of a bell.What does this mean?（）.

A.The unit is working properly
B.The face mask is not sealed properly
C.The air bottle needs to be refilled
D.The air supply hose has a leak

2.單項(xiàng)選擇題After using a C02 portable extinguisher,it should be（）.

A.put back in service if some CO2 remains
B.hydrostatically tested
C.retagged
D.recharged

3.單項(xiàng)選擇題All dunnage planks and mats must be sent to board（）commencement of loading.

A.prior to
B.during
C.in the period of
D.afterwards

4.單項(xiàng)選擇題All echo-sounders can measure the（）.

A.actual depth of water
B.actual depth of water below keel
C.average depth from waterline to hard bottom
D.average depth of water to soft bottom

5.單項(xiàng)選擇題All electrical appliances aboard a vessel should be grounded to（）.

A.prevent them from falling when the vessel rolls
B.protect personnel from electrical shock
C.increase their operating efficiency
D.prevent unauthorized personnal from operating them