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单选题
On a diesel engine, fuel is delivered into the combustion space by （）.
A
a cooling system
B
a lubrication oil system
C
an electric system
D
an injection system
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affect the injection pressureB
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crank caseD
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the size of the holes in the fuel nozzleB
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单选题Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of （）A
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advanced fuel ignitionC
increased fuel economyD
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单选题In the cylinder of a diesel engine fuel is ignited by the（）A
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electrical discharge from the distributorC
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less fuel thanC
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单选题Proper dispersion of fuel in a diesel engine cylinder is dependent upon the （）A
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shape of combustion spaceC
turbulence in combustion spaceD
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