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Mechanical Operations

Mechanical Operations
Which of the following clay mixing devices is vacuum operated for deairation of clay?

None of these
Banbery mixer
Pug mill
Muller-mixer

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Mechanical Operations
Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the

Stamp mill
Bradford's breaker
Blake jaw crusher
Cage mill

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Mechanical Operations
The capacity of a classifier in 'tons of solid/hr' is given by (where, A = cross-sectional area, m² V = rising velocity of fluid, m/sec.S = percentage of solids in the suspension by volume.ρ = density of solids, kg/m³)

3.6 AVS.ρ
3.6 A.S. ρ
3.6 A.V.ρ
3.6 AVS/ρ

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Mechanical Operations
For classification of potable (drinking) water, we use a __________ filter.

Rotary vacuum
Vacuum leaf
Gravity sand
Plate and frame

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Mechanical Operations
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)

D
1.5 D
0.5 D
2 D

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Mechanical Operations
Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately ?

Kick's law
Bond's law
Rittinger's law
None of these

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