Recruitment of chestnut factory

(1) Relationship between cracking rate of shell and temperature. In addition to the same variety, we should also control the shape, freshness and size of chestnut.

(2) By analyzing Figure B, it can be seen that the air pressure in the cracking box is always 2 kPa, that is, when the air pressure in the cracking box is constant, the higher the temperature, the higher the cracking rate of chestnut;

(3) The reason is that 10 1 kPa is much greater than the air pressure in the shell explosion box, and the water vapor generated in the chestnut shell is less leaked when10/kpa is preheated; When the preheated chestnut is put into the shell explosion box, the air pressure difference between the inside and outside of the chestnut shell becomes larger, which improves the shell explosion rate;

So the answer is: (1) the shape and freshness of chestnut; (2) When the air pressure in the cracking box is constant, the higher the temperature, the higher the cracking rate of chestnut; (3)10/kpa is much larger than the air pressure in the shell explosion box, and the water vapor generated in the chestnut shell leaks less when1kloc-0/kpa is preheated; When the preheated chestnut is put into the shell explosion box, the pressure difference between the inside and outside of the chestnut shell becomes larger, which improves the shell explosion rate.