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Mechanical Operations

Mechanical Operations
The sphericity of a cylinder of 1 mm diameter and length 3 mm is

0.6
0.78
0.5
0.9

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Mechanical Operations
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is

KWh/kg
KW. sec/kg
Kg/sec
KWh/sec. kg

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Mechanical Operations
Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about

1 to 2°
5 to 10°
10 to 15°
2 to 5°

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Mechanical Operations
Energy requirement (per unit mass of material crushed/ground) is highest for

Fluid energy mill
Jaw crusher
Ball mill
Rod mill

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Mechanical Operations
Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill.

None of these
Vibratory
Roll
Impact

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Mechanical Operations
The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to

N³
N²
N°
N¹

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