Question

to use a sieve to separate sand and rice seeds, what should be the size of the holes of the sieve in comparison to the size of sand particles and rice seeds?

Answer 1

the hole of sieve is equal to sand
because the sand particles are smaller in size in camparison of rice seeds so that it can be seperateed easily
is that clear

Answer 2

The aggregate should be oven-dried at high temperature before sieving to prevent lump formation of the fine particles due to moisture content, which might clog the fine sieve holes.