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Mechanical Operations

Mechanical Operations
Which of the following comes in the category of primary crusher for hard and tough stone?

Cone crusher
Jaw crusher
None of these
Gyratory crusher

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Mechanical Operations
Basic slag is not ground in

Compartment mills
Ball mills
Tube mills
Jaw crushers

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Mechanical Operations
In a mixer, the quantity, (v. L/D) is termed as __________ number(where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing).

Schmidt
Brinkman
Weber
Peclet

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Mechanical Operations
Grinding efficiency of a ball mill is of the order of __________ percent.

43835
90-95
75-80
40-50

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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

N¹
N°
N²
N³

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Mechanical Operations
Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid.

Thermal conductivity
Density
Viscosity
Surface tension

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