單項(xiàng)選擇題

When dry chemical extinguishers are used to put out class B fires，there is a danger of reflash because dry chemical（）.

A.is not an effective agent on Class B fires
B.does little or no cooling
C.dissipates quickly
D.is rapidly absorbed by the liquid

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單項(xiàng)選擇題

A shipboard Oil Pollution Emergency Plan is required of（）.

A.all vessels，regardless of size and commercial application
B.any barge or ship constructed or operated in such a manner that no oil in any form can be carried aboard
C.an oil tanker of 150 gross tons and above，or other ship of 400 gross tons and above
D.an oil tanker of 400 gross tons and above，or other ships of 150 gross tons and above

單項(xiàng)選擇題

Flooding of any compartment in a ship that results in a serious loss of reserve buoyancy will always（）.

A.increase the trim
B.increase ship stability
C.cause a serious list
D.decrease the heeling moment

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When dry chemical extinguishers are used to put out class B fires，there is a danger of reflash because dry chemical（）.

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A shipboard Oil Pollution Emergency Plan is required of（）.

Flooding of any compartment in a ship that results in a serious loss of reserve buoyancy will always（）.

When dry chemical extinguishers are used to put out class B fires，there is a danger of reflash because dry chemical（）.