單項(xiàng)選擇題Changing direction by bringing the stern of the vessel through the eye of the wind is known as().

A.jibing
B.running before the wind
C.tacking
D.reefing


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2.單項(xiàng)選擇題C02 extinguishes a fire by().

A.cooling
B.smothering
C.chemical action
D.All of the above

3.單項(xiàng)選擇題Combustible gas indicators measure the presence of combustible gas a percentage of the().

A.flash point
B.upper explosive limit
C.lower expiosive limit
D.All of the above

4.單項(xiàng)選擇題Convection spreads a fire by().

A.heated gases flowing through ventilation syetem
B.the transfer of heat across an unobstructed space
C.burning liquids flowing into another space
D.transmitting the heat of a fire through the ships metal

5.單項(xiàng)選擇題Danage to ship’s fittings caused by stevedor’s negligence often happens. Therefore, the stevedores()the cost of the damage repaired afterwards.

A.should hold responsible for
B.should be hold responsible for
C.should be free of
D.should be brarable of