单项选择题
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
相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
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
