单项选择题
A.excessive cylinder lubrication B.a lugging engine C.a leaking cylinder liner D.overloading of one cylinder
The main operating characteristic of diesel engines whi...
单项选择题The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the （）
A.method of supplying air B.cooling system C.method of igniting fuel D.valve operating mechanism
Turbulence is created in the cylinders of a diesel engi...
单项选择题Turbulence is created in the cylinders of a diesel engine to （）
A.obtain injection lag B.help mix fuel and air C.increase combustion pressure D.utilize higher injection pressures
The ratio of the brake horsepower to the indicate of a ...
单项选择题The ratio of the brake horsepower to the indicate of a diesel engine is its （）
A.thermal efficiency B.mechanical efficiency C.brake thermal efficiency D.volumetric efficiency
