單項選擇題

Which of the turbo-charging methods listed directs the exhaust gases to the turbine at fairly uniform velocity and pressure?（）

A.Constant pressure
B.Pulse
C.constant velocity
D.Axial flow

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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

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

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