单项选择题
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
In a flash distilling unit, evaporator feed (seawater) ...
单项选择题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
An independent bilge suction is required for （）.A.balla...
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
If the pump for a hydraulic anchor windlass is overheat...
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
