A.reduce wear on the valve stem
B.permit the use of alloy valve seat materials
C.reduce heat transfer from the valve seat
D.facilitate valve removal for servicing
您可能感興趣的試卷
你可能感興趣的試題
A.place standby cooler in operation
B.reduce engine load
C.check thermostatic valve
D.clean sea water strainer
A.Low lube oil temperature
B.Dirty lube oil strainer
C.Low lube oil pressure
D.High lube oil temperature
A.improper adjustment of the bypass valve
B.a dribble in the fuel injection nozzle
C.insufficient leak-off through injection nozzle packing
D.a malfunctioning injection nozzle
A.hold the valves open
B.keep the valves off their seats until the exhaust stroke is completed
C.close the valves
D.open inlet valves when the air injection cycle begins
A.increased engine breathing efficiency
B.excessive valve lash
C.excessive lube oil consumption
D.lower than normal fuel consumption
最新試題
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
If separating effect is not good, which measure should be taken （）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Under MARPOL Code the ship to which it applies has to carry （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The cetane rating of diesel fuel is an indication of the （）