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.Management Sciences
Category: Mechanical Operations
Which of the following gives the crushing energy required to create new surface ?
A. Taggarts rule
B. Fick’s law
C. Rittinger’s Law
D. None of these
Grizzlies are used for separating _____________ solids?
A. Coarse
B. Fine
C. Any size
D. None of these
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the _____________ of the belt?
A. Speed
B. Thickness
C. Length
D. None of these
The most common filter aid is_________________?
A. Diatomaceous earth
B. Calcium silicate
C. Sodium carbonate
D. Silica gel
Which of the following may prove unsuitable for filtering volatile liquids ?
A. Pressure filter
B. Gravity filter
C. Centrifugal filter
D. Vacuum filter
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator ?
A. Cresylic acid
B. Copper sulphate
C. Calcium carbonate
D. Sodium carbonate
In case of a hammer crusher ?
A. Crushing takes place by impact breaking
B. Maximum acceptable feed size is 30 cms
C. Reduction ratio can be varied by adjusting the distance from cage to hammers
D. All A., B. and C.
Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them ?
A. Jaw crusher, Ball mill, Fluid energy mill
B. Ball mill, Jaw crusher, Fluid energy mill
C. Fluid energy mill, Jaw crusher, Ball mill
D. Fluid energy mill, Ball mill, Jaw crusher
Which of the following mechanical conveyors does not come under the division „scrapers‟ ?
A. Ribbon conveyor
B. Flight conveyor
C. Bucket elevators
D. Drag conveyor
Use of grinding aids results in the ___________________?
A. Enhanced production rate
B. Finer products
C. Both A. & B.
D. Neither A. nor B.
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