单项选择题

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

相关考题

The heat required to change a substance from a solid to...

单项选择题The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of （）.

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

With reference to a vessel’s structural integrity, the ...

单项选择题With reference to a vessel’s structural integrity, the most significant characteristic of a cryogenic liquid is its （）.

A.capability of causing brittle fractures
B.highly corrosive action on mild steel
C.vapor cloud which reacts violently with saltwater
D.toxicity at atmospheric pressure

The only means of removing the latent heat of condensat...

单项选择题The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by （）.

A.passing it through the expansion valve
B.condensing refrigerant in the system condenser
C.passing the gaseous refrigerant through the heat interchanger on the suction side of the compressor
D.maintaining a high pressure on the systems receiver

船舶辅助机械

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