Related Questions

In a ball mill, the volume occupied by the balls (when the mill is stopped) is about __________ percent of the volume of the mill.
A 35
B 50
C 70
D 85
Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?
A Jet mills
B Fluid energy mill
C Micronizer
D All of the above
Size measurement of ultrafine particles can be best expressed in terms of
A Centimetre
B Screen size
C Micron
D Surface area per unit mass
The main size reduction operation in ultrafine grinders is
A Cutting
B Attrition
C Compression
D Impact
Temperature of the product during ultrafine grinding
A Increases
B Decreases
C Remains constant
D May increase or decrease ; depends on the material being ground
For the transportation of ultrafine particles, the equipment used is a........conveyor.
A Belt
B Pneumatic
C Screw
D None of these
To get ultrafine particles, the equipment used is a
A Ball mill
B Rod mill
C Hammer crusher
D Fluid energy mill
Ultrafine grinders operate principally by
A Slow compression
B Impact
C Attrition
D Cutting action
In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used is
A Cylindrical grinder
B Internal grinder
C Surface grinder
D Tool and cutter grinder
General mechanism of size reduction in intermediate and fine grinder is by
A Cutting action
B Compression
C Compression and tearing
D Impact and attrition

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