_____________ mills are termed as impactors?
_____________ mills are termed as impactors?
A. Hammer
B. Cage
C. Rolling-compression
D. None of these
Mechanical Operations
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For coarse reduction of hard solids, use ____________________?
For coarse reduction of hard solids, use ____________________?A. Impact
B. Attrition
C. Compression
D. Cutting -
Which of the following equations is Rittinger’s crushing law? (Where P = power required by the machine, m = feed rate, k = a constant, D̅ sa & D̅ sb = volume surface mean diameter of feed & product respectively) ?
Which of the following equations is Rittinger’s crushing law? (Where P = power required by the machine, m = feed rate, k = a constant, D̅ sa & D̅ sb = volume surface mean diameter of feed & product respectively) ?A. P/m = K/ √Dp
B. P/m = K . ln D̅ sa/D̅ sb
C. P/m = K . (1/ D̅ sb – 1/D̅ sa)
D. None of these -
______________ mill is not a revolving mill ?
______________ mill is not a revolving mill ?A. Pebble
B. Compartment
C. Cage
D. Tube -
The crushed material received for separation is called feed or_________________?
The crushed material received for separation is called feed or_________________?A. Tailing
B. Heading
C. Concentrate
D. Middling -
A filter press is___________________?
A filter press is___________________?A. A batch filter
B. Not suitable, if the liquid is the main product
C. Having prohibitively high maintenance cost
D. Not suitable for wide range of materials under varying operating conditions of cake thickness
and pressure -
About 2-3 hp, power per gallon of a thin liquid provides vigorous agitation in an agitator. ‘Power number’ in agitation is given by __________________?
About 2-3 hp, power per gallon of a thin liquid provides vigorous agitation in an agitator. ‘Power number’ in agitation is given by __________________?A. P. gc/n3. D2. ρ
B. P. gc. ρ/μ2
C. n3. D3. ρ/P. gc
D. P. gc/n2. D2. ρ -
Pick out the material having minimum Rittinger’s number?
Pick out the material having minimum Rittinger’s number?A. Calcite
B. Pyrite
C. Quartz
D. Galena -
Wheat is ground into flour in a___________________?
Wheat is ground into flour in a___________________?A. Hammer crusher
B. Roller crusher
C. Impact mill
D. Fluid energy mill -
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a__________________?
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a__________________?A. Pug mill
B. Mixer-extruder
C. Banbury mixer
D. Muller mixer