单项选择题
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
A.Speed limiting governor
B.Over-speed governor
C.Over-speed trip
D.Over-speed relay
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相关考题
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单项选择题
Diesel engine lube oil diluted with fuel oil is indicated by（）
A.decreased viscosity
B.decreased pour point
C.increased flash point
D.increased viscosity -
单项选择题
The primary purpose of oil control rings on a diesel piston is to（）
A.provide a reservoir for cylinder lubrication
B.pump oil into the combustion space for cylinder cooling
C.prevent excessive lubricating oil consumption
D.allow hydraulic oil film formation on the cylinder -
单项选择题
The purpose of compressing the air within the cylinder of a diesel engine is to （）
A.produce the heat for ignition
B.decrease injection lag
C.increase ignition delay
D.aid in exhausting burnt gases
