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單項選擇題

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

單項選擇題

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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