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Mechanical Operations

Mechanical Operations
Cement clinker is reduced to fine size by a

Tube mill
Roll crusher
Hammer mill
Ball mill

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Mechanical Operations
If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is Φs is defined by

Φs = 6 dp Sp/Vp
Φs = 6 Vp/dp sp
Φs = Vp/dp sp
Φs = dp Sp/Vp

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Mechanical Operations
Xanthates are used in the froth floatation process as a/an

Conditioner
Frother
Activator
Collector

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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
Weber
Peclet
Brinkman

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Mechanical Operations
The unit of specific cake resistance is

Cm/gm
Cm/gm²
Gm/gm
Gm/cm²

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Mechanical Operations
General mechanism of size reduction in intermediate and fine grinder is by

Cutting action
Impact and attrition
Compression and tearing
Compression

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