A.thermal efficiency
B.mechanical efficiency
C.brake thermal efficiency
D.volumetric efficiency
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A.wide compression rings are used
B.oil rings are located above the piston
C.chromium plating is used on all piston rings
D.oil rings are located near the bottom of the piston skirt
A.runs out of fuel
B.has low lubricating oil pressure
C.exceeds a set maximum speed
D.has high cooling water temperature
A.prevent any lubricant from reaching
B.prevent excessive lubrication from reaching the combustion space
C.Provide metal-to-metal contact to seal the cylinder against blow-by
D.assure a positive means of scraping carbon accumulation from the cylinder
A.Dull black appearance
B.Bright appearance
C.Thin layer of lacquer
D.Thick oily film
A.noise coming from that air starting valve
B.continuous operation of the starting air compressor
C.zero air pressure in the air starting system
D.overheated starting air pipe to the cylinder head
最新試題
The cetane rating of diesel fuel is an indication of the （）
To proceed to the assistance of a ship in distress is（）
Cold weather starting of a diesel engine may be made easier by（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The shipboard oil pollution emergency plan will be invalid after （）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）