單項(xiàng)選擇題

In a turbocharger, inlet air velocity is increased in the（）.

A.inlet nozzle ring
B.stationary diffuser passages
C.compressor outlet volute
D.rotating impeller vanes

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Faulty operation of diesel engine fuel injection nozzles can be a direct cause of（）.

A.excessive fuel nozzle holder cooling
B.sediment in the fuel supply
C.distortion of the fuel spray pattern
D.improper atomization of the fuel

單項(xiàng)選擇題

When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）

A.lag behind the increased fuel supplied to the engine
B.enter the engine along with the increase in the fuel
C.enter the engine before the increased fuel supply
D.leave the turbocharger as a negative pulse