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单选题
When fuel is injected late into a diesel engine cylinder,（）.
A
the exhaust will be clear
B
fuel consumption will be low
C
all the fuel will be burned at top dead center
D
fuel consumption will be high
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When fuel is injected late into a diesel engine cylinder_______.A.the exhaust will be clearB.fuel consumption will be lowC.all the fuel will be burned at top dead centerD.fuel consumption will be high
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quantity of fuel injected is decreasedB
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单选题A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）A
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单选题If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an （）A
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单选题When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?（）A
Quantity of fuel injected tends to be decreasedB
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单选题Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）A
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单选题When fuel is injected late into a diesel engine cylinder,（）.A
the exhaust will be clearB
fuel consumption will be lowC
all the fuel will be burned at top dead centerD
fuel consumption will be high
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单选题Burning fuel with a high sulfur content in a diesel engine will （）A
increase thermal efficiencyB
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increase the ability of the engine to start in cold weatherD
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单选题Fuel is ignited in a diesel engine cylinder by （）A
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单选题In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with（）A
low firing pressureB
low exhaust temperatureC
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单选题In a diesel engine, when the fuel is injected into the cylinder,（）A
the piston is just coming upward from the bottom dead centerB
the piston has moved about one-fifth of the way upC
the piston has moved most of the way up and almost reached the TDCD
the piston has just past the TDC
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单选题A change in the quality of fuel atomization by a diesel engine fuel injector would be caused by a/an （）A
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leaking needle valveD
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单选题Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）A
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单选题Fuel is admitted to a diesel engine cylinder through the （）.A
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单选题What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）A
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单选题Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）A
electronic ignition systemB
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单选题Fuel droplets injected into a diesel engine cylinder must have adequate penetration to （）A
prolong the ignition delay periodB
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thoroughly utilize the air chargeD
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单选题Fuel injected into a diesel engines cylinder is ignited by （）.A
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单选题Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）A
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单选题When fuel is injected in a diesel engine cylinder too early, （）A
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the exhaust will be clear
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单选题Turbulence in a diesel engine cylinder is of major importance in providing （）.A
proper fuel meteringB
complete fuel/air mixingC
minimal fuel penetrationD
proper fuel timing
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