单项选择题
If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）
A.early injection timing
B.worn orifices in the injection nozzles
C.worn or scored cylinder liners
D.using a fuel with too low of a cetane number
点击查看答案&解析
相关考题
-
单项选择题
Scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished（）
A.during the valve overlap period
B.with only the exhaust valve open
C.at a pressure below atmospheric
D.without cooling the cylinders or pistons -
单项选择题
A diesel engine piston crown can crack from （）
A.excessive piston to liner clearance
B.excessive dirt beneath the piston crown that reduces heat transfer
C.faulty nozzle spray
D.all of the above -
单项选择题
Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）
A.an increased flash point
B.higher lube oil pressures
C.an increased viscosity
D.lower lube oil pressures
