单项选择题
Distortion of the spray pattern of a nozzle or injector may be indicated by a/an（）
A.high firing pressure B.overload of that particular cylinder C.smoky exhaust D.cooling water temperature rise
单项选择题 The rate of pressure rise during the period following fuel ignition in a diesel will result in （）
单项选择题 Higher than normal temperature air passing through the intake of a diesel engine will result in（）
单项选择题 Air scavenging of a diesel engine cylinder（）
