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單項選擇題

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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單項選擇題

A crankshaft whose center of gravity coincides with its center line is said to be （）.

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

單項選擇題

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