单项选择题X 纠错
A.temperature in the space being cooled
B.liquid refrigerant pressure at the solenoid valve
C.pressure drop across the evaporator coils
D.refrigerant gas superheat at the coil outlet
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单项选择题
A.remains the same
B.is reduced
C.is increased
D.is eliminated
单项选择题
A.corrosion on the gears
B.excessive gear speed
C.dirt in the oil
D.misalignment of the gears
单项选择题
A.maintain alignment when the ship’s hull is working in heavy seas
B.ensure engine vibrations correspond to the natural frequency of the hull
C.permit the engine to expand away from the driven equipment as the engine heats up and expands
D.maintain engine thrust bearing clearances
单项选择题
A.must churn the oil in the sump
B.is connected to the propeller shaft
C.is driven at the highest RPM
D.compensates for alignment variations between the engine and pinion gear
单项选择题
A.reduce load
B.check your exhaust
C.adjust cooling water temperature
D.increase lube oil flow
