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單項(xiàng)選擇題

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?（）

A.Fuel injection timing will change
B.Nozzle operation will be unaffected
C.Fuel will leak into the drain line
D.Fuel will not be delivered

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單項(xiàng)選擇題

A dry-type exhaust muffler clogged with soot, will cause（）

A.low exhaust temperature
B.loss of engine power
C.burned intake valves
D.engine racing

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An operating turbocharged diesel engine that suddenly loses power, is due to a/an（）

A.restricted turbocharger air intake
B.oil leak into the turbocharger
C.dribbling injector
D.low fuel viscosity

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