第四章单元测试
- In the range of 0-120℃, the specific heat capacities of vapor and dry air are respectively .在0-120℃范围内,水汽与干空气的比热容分别是 。( )
- The relative size relation of t, tw, tas, td for unsaturated air is .不饱和空气的干球温度t,湿球温度tw,绝热饱和温度ts,露点温度td的相对大小关系是。( )
- At a certain temperature, when the humidity increases, the dew point temperature will .一定温度下,当湿度增加时,其露点温度将 。( )
- In the falling rate period of drying of porous materials, water vaporizes on the ( ) of solid materials.在多孔物料干燥过程的降速阶段,水分汽化的位置是 。( )
- The smaller the drying rate in the constant rate period, the () the Xc.恒速阶段的干燥速率越小,临界含水率 。( )
A:1.88 kJ/(kg·℃) and 1.01 kJ/(kg·℃) B:1.88 kJ/(kg·℃) and 1.244 kJ/(kg·℃) C:1.244 kJ/(kg·℃) and 1.88 kJ/(kg·℃)
答案:1.88 kJ/(kg·℃) and 1.01 kJ/(kg·℃)
A:t>tw=tas>td B:t>td>tw>tas C:tw>t>tas>td
A:not change不变 B:rise增加 C:decrease降低
A:surface and inside表面和内部 B:surface表面 C:inside内部
A:larger 越大 B:smaller 越小
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