论文部分内容阅读
1.判断题 1.(×) 2.(×) 3.(0) 4.(0) 5.(0) 6.(0) 7.(×) 8.(0) 9.(×) 10.(0) 下面就1、2、7题不正确的原因,分别作简要的说明供读者参考。由于本期“答读者问”已就柴油十六烷值的含义作了解答,所以这里未对第9题作说明。 1.压缩比等于气缸最大容积与最小容积(均包括燃烧室容积)的比值; 2.滑动物体的摩擦力,等于摩擦系数与法向力的乘积。摩擦力的大小与接触面的面积无关;
1. Judgment 1. (×) 2. (×) 3. (0) 4. (0) 5. (0) 6. (0) 7. (×) 8. (0) 9. (×) 10 . (0) Below 1, 2, 7 questions are not correct, respectively, for a brief description for readers reference. Since this issue of “A Readers’ Question” has been answered in terms of the meaning of diesel cetane number, we have not explained the 9th issue here. 1. The compression ratio is equal to the ratio of the cylinder maximum volume to the minimum volume (both including the combustion chamber volume). 2. The friction force of the sliding object is equal to the product of the friction coefficient and the normal force. The size of the friction has nothing to do with the area of the contact surface;