Chemical Engineering — Test 86
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Question 1
The mechanism of size reduction by a hammer mill is by impact and attrition between the________________?
Question 2
Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of__________________?
Question 3
During size reduction by a jaw crusher, the energy consumed decreases with the__________________?
Question 4
Out of the following size reduction equipments, the maximum feed size can be accepted by the__________________?
Question 5
The capacity of a classifier in ‘tons of solid/hr’ is given by (where, A = cross-sectional area in m2, V = rising velocity of fluid in m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids in kg/m3)_________________?
Question 6
For a turbine agitated and baffled tank, operating at low Reynold’s number (based on impeller diameter), the power number (Np) varies with NRe as_________________?
Question 7
Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a ______________ conveyor?
Question 8
Screen efficiency is______________________?
Question 9
In case of a hammer crusher ?
Question 10
To remove very small amount of tiny solid impurities from liquid, we use a_____________________?