單項選擇題Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）

A.The expansion tank should be topped off
B.The thermostatic water regulating valves should be manually opened
C.The fuel filters should be changed
D.The engine should be turned over slowly with the indicator cocks open


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1.單項選擇題The order “（） ” means “Maximum maneuvering engine revolution for ahead propulsion”.

A.Full Ahead
B.Half Ahead
C.Full Astern
D.Half Astern

2.單項選擇題Winch gears must be maintained in proper alignment to prevent （）.

A.overheating of the lube oil
B.over-speeding of the motor
C.wear on the braking system
D.damage to the teeth

3.單項選擇題You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what actionshould be carried out?（）

A.Send the wiper into the well with only a scoop and pail
B.Remove the bilge manifold valve and attempt to back flush the line
C.Simultaneously operate all available bilge pumps
D.It is only necessary to transfer half the contents of a drum of degreaser into the bilge well

4.單項選擇題You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what action should be carried out?（）

A.Send the wiper into the well with only a scoop and pail
B.Remove the bilge manifold valve and attempt to back flush the line
C.Simultaneously operate all available bilge pumps
D.It is only necessary to transfer half the contents of a drum of degreaser into the bilge well

5.單項選擇題Wear occurring at the tips of the reduction gear teeth is usually the result of （）.

A.surface fatigue
B.fretting corrosion
C.heavy overloading
D.gear misalignment