單項(xiàng)選擇題

Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in （）

A.increased horsepower
B.reduced efficiency
C.increased heat loss
D.lower cylinder pressures

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An emergency diesel generator should automatically shut down in the event of （）

A.dangerous over-speeding
B.a loss of lube oil pressure
C.activation of the fixed CO₂system for the emergency generator space
D.all of the above

單項(xiàng)選擇題

The purpose of the flywheel is to （）

A.provide energy to operate the engine between power impulses
B.neutralize the primary inertia force of the crankshaft
C.reduce the shock of starting loads on the main bearings
D.prevent the engine from operating at critical speed