单项选择题
A.telescoping B.ring ‘snap’ gauge C.inside vernier caliper D.outside micrometer
The ignition quality of a diesel fuel is indicated by t...
单项选择题The ignition quality of a diesel fuel is indicated by the （）
A.cetane number B.volatility point C.viscosity index D.octane number
The ignition quality of a diesel fuel oil is indicated ...
单项选择题The ignition quality of a diesel fuel oil is indicated by the （）
A.specific gravity B.cetane number C.viscosity D.calorific valve
Which of the following conditions could contribute to t...
单项选择题Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）
A.Leaking seal ring B.Insufficient heat transfer from the exhaust valves C.Block cooling water passages to the head D.Excessive scavenging air provided to the engine
