单项选择题
In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）
A.injection lag B.ignition delay C.compression D.turbulence lag
单项选择题 Fuel is ignited in a diesel engine cylinder by （）
单项选择题 Vessels having main engines arranged for air starting are to be provided with at least （）
单项选择题 Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）
