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.Management Sciences
Category: Mechanical Operations
Vacuum filter is most suitable for the_______________?
0
A. Removal of fines from liquid
B. Liquids having high vapour pressure
C. Liquids of very high viscosity
D. None of these
increasing the capacity of a screen _______________ the screen effectiveness?
A. Decreases
B. Increases
C. Does not effect
D. None of these
Gold ore concentration is mostly done using___________________?
A. Jigging
B. Tabling
C. Froth floatation
D. Elutriation
What is the selectivity index, if the grade of tailings & concentrate is the same ?
A. 0
B. ∞
C. 1
D. 0.5
Gelatinous solid (which plug the septum) can be filtered by a _____________ filter?
A. Sparkler
B. Plate and frame
C. Vacuum leaf
D. Pre-coat
Which of the following must be stored in silos and not in open yard ?
A. Coke breeze
B. High V.M. bituminous coal
C. Sand
D. None of these
Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an________________?
A. Air filter
B. Bag filter
C. Venturi scrubber
D. Hydrocyclones
Colloid mills achieve size reduction mainly by___________________?
A. Impact
B. Attrition
C. Cutting
D. Compression
Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?
A. < 5
B. 10 to 25
C. < 74
D. > 1000
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
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