Define size separation. How will you grade the powder according to IP 1985.

Define size separation. How will you grade the powder according to IP 1985.
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1 Answer

Answer :

Definition:-

It is technique used to separate particles of specified size.

Different grades of power according to I.P 1985.

1) Coarse powder-it is the powder of which all the practices pass through sieve no.10 and not more than 40% pass though sieve no.44

2) Moderately coarse powder-it is powder of which all particles pass through sieve no22 and not more than 40% pass through sieve no.60

3)Moderately fine powder-it is powder of which all the particles pass through sieve no.44 and not more than 40% pass through sieve no.85

4)Fine Powder –it is powder of which all particles pass through sieve no 85

5)Very fine powder-it is powder of which all particles pass through sieve no.120
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