单项选择题
The function of lubricating oil is to （）.
A.reduce friction between moving surfaces
B.provide even distribution of bearing wear
C.reduce the accumulation of harmful detergents
D.maintain a constant oil temperature output at each beating
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In a flash distilling unit, evaporator feed (seawater) first absorbs heat in the （）.
A.vapor feed heater
B.air ejector condenser
C.saltwater heater
D.distillate cooler -
单项选择题
An independent bilge suction is required for （）.
A.ballast tanks
B.sludge tanks
C.machinery space bilges
D.cargo hold bilges -
单项选择题
If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.
A.excessive drive motor speed
B.excessive pump discharge pressure
C.too low of a tilting box angle
D.insufficient drive motor speed
