單項(xiàng)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


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2.單項(xiàng)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

3.單項(xiàng)選擇題An electrically driven automatically operating auxiliary blower is provided for slow speed and () of a low speed diesel engine.

A.manoeuvring operations
B.bad combustion
C.cooling
D.mooring trial

4.單項(xiàng)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

5.單項(xiàng)選擇題Among the rings of a piston the () one is subjected to the greatest load and temperature.

A.bottom
B.middle
C.top
D.none of the above