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單項選擇題

The heat required to change a substance from a liquid to a gas without experiencing a temperature change is defined as the latent heat of （）.

A.fusion
B.vaporization
C.sublimation
D.condensation

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單項選擇題

Which of the processes listed consumes the greatest amount of power while producing the greatest amount of heat?（）

A.Overcoming sliding friction
B.Overcoming rolling friction
C.Overcoming fluid friction
D.Overcoming oil wedge friction

單項選擇題

The degree to which the viscosity of an oil will change with a change in temperature is indicated by the （）.

A.weight designation
B.viscosity index
C.pour point
D.thermal change value

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