A.be clear
B.be blue
C.be light green
D.show bubbles
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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
A.remains the same
B.is reduced
C.is increased
D.is eliminated
A.corrosion on the gears
B.excessive gear speed
C.dirt in the oil
D.misalignment of the gears
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
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
最新試題
The cetane rating of diesel fuel is an indication of the （）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
To proceed to the assistance of a ship in distress is（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.