Search
.Management Sciences
Category: Mechanical Operations
Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?
0
A. Jet mills
B. Fluid energy mill
C. Micronizer
D. All A., B. and C.
The study on washability of coal is done by using the _____________ technique?
A. Tabling
B. Elutriation
C. Heavy media separation
D. None of these
Reciprocal of sphericity is termed as the________________?
A. Specific surface ratio
B. Shape factor
C. Sauter diameter
D. Surface area per unit mass
_______________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals?
A. Separation efficiency
B. Selectivity index
C. Concentration ratio
D. None of these
Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill.) ?
A. D
B. 1/D
C. D2.5
D. 1/D2.5
Dispersion of a gas through liquid is done by using a__________________?
A. Sparger
B. Kneader
C. Masticator
D. None of these
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
Ultra centrifuges are used for the separation of _____________ solid particles?
A. Coarse
B. Fine
C. Colloidal
D. Dissolved
Recent Comments