單項(xiàng)選擇題（） system is arranged to ensure that water can be drawn from any tank or the sea and discharged to any other tank or the sea as required to trim the vessel.

A.The domestic water
B.Bilge water
C.Oil transfer
D.The ballast


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1.單項(xiàng)選擇題（） connected to the moving tiller will bring the floating lever pivot and the lever into line at right angles to the screw shaft axis.

A.A cut-off lever
B.A swivel block
C.A cross-head
D.A driving gear

2.單項(xiàng)選擇題Two rams of the hydraulic gear are linked at their outer ends to （） by a crosshead and swivel block.

A.the piston rod
B.the tiller arm
C.the connecting rod
D.the rudder

3.單項(xiàng)選擇題Excessively warm water leaving condenser may be caused by（）

A.fouled tubes in shell and tube condenser
B.too little or too warm condenser water
C.air or non-condensable gas in system
D.overcharge of refrigerant

4.單項(xiàng)選擇題（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A.The winch motor
B.The band brake
C.The winch barrel
D.The anchor capstan

5.單項(xiàng)選擇題（） unit is mounted so as to raise and lower the cable from the spurling pipe, which is at the top and center of the chain or cable locker.

A.The cable lifter
B.The hoisting motor
C.The topping wire
D.The life-raft