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
单项选择题 A turbocharged diesel engine will have an intake manifold pressure（）
单项选择题 A leaking diesel engine fuel injector will cause（）
单项选择题 The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）
