单项选择题
A.mixed with clean oil B.purified C.heated D.strained
Dirt in the fuel oil system of a diesel engine can caus...
单项选择题Dirt in the fuel oil system of a diesel engine can cause （）.
A.clogged filters B.poor combustion C.overloading of the diesel D.shock of fuel lines
Diesel oil may be used to cool （） of a diesel engine.A....
单项选择题Diesel oil may be used to cool （） of a diesel engine.
A.cylinders B.exhaust valves C.pistons D.fuel valves
Diesel engines are started by supplying （） into the cyl...
单项选择题Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.
A.fuel oil B.diesel oil C.compressed air D.jacket water
