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Mechanical Operations

Mechanical Operations
Mixing of plastic solids is generally facilitated by

Dispersion
Mastication
None of these
Kneading

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Mechanical Operations
The porosity of a compressible cake is

Minimum at the filter medium
Minimum at the upstream face
Same throughout the thickness of cake
Maximum at the filter medium

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Mechanical Operations
Filtration rate does not depend upon the

None of these
Properties of the cake & the filtrate
Pressure drop & area of filtering surface
Resistance of the cake & the septum

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Mechanical Operations
Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is

√3
√2
0.5
1

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Mechanical Operations
Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill.

Cage
Both A & B
Neither A nor B
Hammer

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Mechanical Operations
A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is

0.6
None of these
0.4
0.1

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