单项选择题
In a full flow type lube oil system, the bypass relief valve will lift due to （）
A.a clogged filter element
B.excessive lube oil pump discharge pressure
C.excessive lube oil flow
D.excessively hot lube oil
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相关考题
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单项选择题
In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）
A.improper venting of the cooling system
B.carrying the expansion tank water level too high
C.a totally clogged impeller in the cooling water pump
D.an incorrectly set cooling system temperature control -
单项选择题
A dirty lube oil strainer can result in（）
A.crankcase
B.low lube oil temperature
C.excessive oil consumption
D.low bearing oil pressure -
单项选择题
Differential needle valves used in fuel injectors are directly closed by（）
A.cam action
B.spring force
C.fuel oil pressure
D.firing pressure
