Correct answer
D. Secondary
Explanation
The correct answer is Secondary.
Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of ________ mm?
Pick out the first order system from among the following?
Amino resins are used in paper treatment to improve its________?
Insufficient washing of sand grains in a rapid sand filter causes________?
Gases diffuse faster compared to liquids because of the reason that the liquid molecules________?
Size reduction of moulding powders, waxes, resins & gums are done in a ________ mill?