單項選擇題As a heat engine,() energy is the source of power by which the diesel engine can be operated.

A.electric
B.heat
C.mechanical
D.exhaust


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1.單項選擇題An overspeed safety device is usually fitted to a generator engine for () in the event of overspeed.

A.cutting power off the engine
B.increasing the fuel pump setting
C.braking the crankshaft
D.stabilizing the ship speed

3.單項選擇題An increase in load on a diesel engine results in () of speed of the crankshaft.

A.a reduction
B.an increase
C.an outing
D.a downwards

5.單項選擇題An aluminum piston has lower inertia and higher coefficient of () compared to that of cast iron.

A.viscosity
B.twisting moments
C.inertia
D.thermal expansion