cut-off is increased

cut-off is decreased

cut-off is zero

cut-off is constant

remains constant

decreases

increases

none of these

12

14

16

32

equal to one

less than one

greater than one

none of these

drying and crushing the coal to a fine powder

moulding the finely ground coal under pressure with or without a binding material

heating the wood with a limited supply of air to temperature not less than 280 Degree Centigrade

none of the above