單項選擇題A dirty intercooler on the ship service air compressor will result in ().

A.decreased compression ratio
B.higher than normal power consumption
C.un-loader malfunction
D.water in the lubricating oil


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1.單項選擇題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

2.單項選擇題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

3.單項選擇題An independent bilge suction is required for ().

A.ballast tanks
B.sludge tanks
C.machinery space bilges
D.cargo hold bilges

4.單項選擇題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

5.單項選擇題Refrigerant enters the condenser as a ().

A.high pressure liquid
B.low pressure vapor
C.high pressure vapor
D.low pressure liquid