单项选择题

A.immediately reverse the enginesB.stop the propellers ……

On a vessel，if someone fell overboard and you did not know over which side the person fell，you should（）.

A.immediately reverse the engines
B.stop the propellers from turning and throw a ring buoy over the side
C.increase speed to full to get the vessel away from the person
D.first put the rudder hard over in either direction

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单项选择题On a ship，a fire pump may be used for other purposes if（）.

A.the other services are run off a reducing station with a pressure gage
B.a separate fire pump is available for use on the fire main
C.all other services are operated by a manifold near the pump
D.All of the above

单项选择题On a rigid liferaft which is equipped with all of the required equipment you may NOT find a（）.

A.boathook
B.fishing kit
C.lifeline or grab rail
D.sea painter

单项选择题Oil fires are best extinguished by（）.

A.cutting off the supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water

单项选择题Multiple fire pumps may be used for other purposes provided that one pump is（）.

A.on line to the fire main
B.kept available for use on the fire main at all times
C.capable of being connected to the fire main
D.rated at or above 125 psi

单项选择题Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.

A.persons in the space wear gas masks
B.persons in the space wear damp cloths over their mouths and nostrils
C.ventilation system is secured and all persons leave the space
D.ventilation system is kept operating