单项选择题

The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed （）.

A.metering
B.timing
C.rate of injection
D.rate of distribution

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单项选择题

A.dynamically balanced
B.statically balanced
C.counter balanced
D.resonantly balanced

单项选择题

When centrifuging heavy fuel oil, an important factor to consider is the （）
(1) flow rate
(2) viscosity of the fuel oil

A.(1) only is correct
B.(2) only is correct
C.both (1) and (2) are correct
D.neither (1) or (2) are correct

单项选择题

A.oil suction line restriction
B.correct amount of coolant
C.cavitation erosion in the water jackets
D.clogged sea suction strainer