当压力很时,粘度随着温度升高而(),当压力很高时,气体的粘度随温度的升高而()。
A.增大,降低
B.降低,增大
C.增大,变化不大
D.变化不大,降低
- · 有3位网友选择 B,占比37.5%
- · 有2位网友选择 D,占比25%
- · 有2位网友选择 C,占比25%
- · 有1位网友选择 A,占比12.5%
A.增大,降低
B.降低,增大
C.增大,变化不大
D.变化不大,降低
气体的粘度随压力增高而增高。在低压时,气体粘度随温度升高而增加,随着压力的增加,温度升高对粘度增大的影响越来越小,当压力很高时(100×105Pa以上),气体粘度随温度升高而降低,明显表现出类似于液体的性质。Table 1-13 shows the dynamic viscosity of methane at different pressures and temperatures. It can be seen from the table that the viscosity of gas increases with the increase of pressure. At low pressure, the gas viscosity increases with the increase of temperature. With the increase of pressure, the influence of temperature increase on the increase of viscosity becomes smaller and smaller. When the pressure is very high (100×105Pa and above), the gas viscosity decreases with the increase of temperature, showing obvious properties similar to liquid.
A.压力增大粘度下降,温度升高粘度下降
B.压力增大粘度升高,温度升高粘度升高
C.压力增大粘度升高,温度升高粘度下降
D.压力增大粘度降低,温度升高粘度升高
油品的粘度随温度变化而变化,(),这种随温度变化而变化的特性称为油品的粘温性质。
A.温度升高,粘度增大,温度降低,粘度减小
B.温度升高,粘度减小,温度降低,粘度增大
C.温度升高,温度降低,粘度不变
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