问题：
[单选] The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.
has begun。takes place。occurs。happe。
问题：
[单选] The fuel injector pump is operated by （） which drives the plunger up and down.
a separate motor。a cam。a generator。a chai。
问题：
[单选] The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.
fuel treatment。fuel combustion。fuel injection。fuel separating。
问题：
[单选] The fuel pipes and ducts should be blown with （）.
atmosphere。the fresh water。compressed air。chemical compound。
问题：
[单选] The function of a lubricating oil is （） to lubricate the running surface （） to carry away a great deal of heat.
not；but。neither；nor。either；or。not only；but also。
问题：
[单选] The gas loads on the engine structure are constrained by means of hydraulically preloaded （） which connect the bed plate, frame sections and cylinder jackets into a single unit.
connecting rods。main bearing。column。tie rod。
问题：
[单选] The governor of a generator engine is to （）.
make the engine stop。regulate the timing of camshafts。make the rpm stabilize at any required value。make the engine run at nearly constant speed。
问题：
[单选] The gudgeon pin is carried in （） in the piston skirt.
the bearing。the crosshead。bosses。bridge。
问题：
[单选] The hand steering is a method by which the motion of the rudder is controlled with （）.
a motor-driven steering wheel。a pneumatic steering wheel。a hand-driven steering wheel。an electric steering wheel。
问题：
[单选] The heart of the diesel engine is the （） where the fuel is burnt and the power developed.
crankcase。cylinder。scavenge box。pisto。
