单项选择题
Diesel engine cylinder head test cocks are used to（）
A.check cylinder lubrication prior to starting engine
B.connect exhaust gas analyzers to determine engine efficiency
C.pressure test cylinder heads to check for leaks
D.remove moisture accumulations from cylinder prior to starting
相关考题
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单项选择题
A turbocharged diesel engine will have an intake manifold pressure（）
A.constantly decreasing as engine load increase
B.constantly increasing as the amount of supercharging increases
C.approximately equal to exhaust manifold pressure at all times
D.approximately equal to atmospheric pressure at all times -
单项选择题
A leaking diesel engine fuel injector will cause（）
A.prolonged maintenance intervals
B.improved atomization
C.greater fuel economy
D.incomplete combustion -
单项选择题
The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）
A.greater than the average exhaust manifold pressure
B.less than the average exhaust manifold pressure
C.greater at the turbine wheel than at the impeller
D.greater at reduced engine speed
