Related Questions

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
Which of the following is not an ultrafine grinder (colloid mill)?
A Micronizers
B Agitated mills and fluid energy mills
C Toothed roll crusher
D Hammer mills with internal classification
Which of the following terminology is not used for size reduction of materials to fine sizes or powders?
A Comminution
B Dispersion
C Pulverisation
D Compression
The mechanism of size reduction by a hammer mill is by impact and attrition between the
A Grinding element & the housing
B Feed particles
C Both A & B
D Neither A nor B
Size reduction mechanism used in Jaw crushers is
A Attrition
B Compression
C Cutting
D Impact
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
A Acrylic
B Polyester
C Nylon 6:6
D Polypropylene
Out of the following size reduction equipments, the maximum feed size can be accepted by the
A Tube mill
B Ball mill
C Jaw crusher
D Jet pulveriser
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
The reduction ratio for fine grinders is
A 5-10
B 10-20
C 20-40
D As high as 100
A reduction of 15% in the price of a shirt resulted in the reduction of the price of the shirt by Tk 21. What was the previous price of the shirt?
A Tk. 175
B Tk. 140
C Tk. 150
D Tk. 120

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