單項(xiàng)選擇題

Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is（）

A.entirely constant pressure
B.entirely constant temperature
C.a combination of constant volume and constant pressure
D.a combination of constant temperature and constant pressure

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單項(xiàng)選擇題

The over-speed trip device installed in some diesel engines is automatically actuated by（）

A.spring force
B.hydraulic pressure
C.centrifugal force
D.mechanical linkage

單項(xiàng)選擇題

The flywheel reduces speed fluctuations by （）

A.maintaining a constant rack setting
B.storing kinetic energy
C.maintaining equal exhaust pressure
D.maintaining even camshaft speed