The reduction ratio for fine grinders is_____________?
The reduction ratio for fine grinders is_____________?
A. 5-10
B. 10-20
C. 20-40
D. As high as 100
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The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an______________?
The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an______________?A. Bag filter
B. Electrostatic precipitator
C. Cyclone separator
D. Wet scrubberMass flow of granular solid (M) through a circular opening of dia, D follows_____________________?
Mass flow of granular solid (M) through a circular opening of dia, D follows_____________________?A. M ∝ √D
B. M ∝ D2
C. M ∝ D3
D. M ∝ DWhat is the reduction ratio in a fine crushing operation having following feed and product sizes ?
What is the reduction ratio in a fine crushing operation having following feed and product sizes ?A. 0.5
B. 2
C. 5
D. 10Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the _____________ filtration?
Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the _____________ filtration?A. Constant rate
B. Varying pressure
C. Varying rate
D. Constant pressure_____________ mills are termed as impactors?
_____________ mills are termed as impactors?A. Hammer
B. Cage
C. Rolling-compression
D. None of theseThe resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?
The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?A. c/s
B. s/c
C. s . c
D. 1/s . c