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Mechanical Operations

Mechanical Operations
__________ conveyors are also called scrapers.

Screw
Apron
Both B & C
Helical flight

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Mechanical Operations
Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.

Toothed roll
Gyratory
Blake jaw
None of these

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

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Mechanical Operations
Highly viscous liquids & pastes are agitated by

None of these
Propellers
Multiple blade paddles
Turbine agitators

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Mechanical Operations
With increase in the capacity of screens, the screen effectiveness

Remains unchanged
Decreases exponentially
Decreases
Increases

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Mechanical Operations
Mechanical conveyors which push the material along an endless trough or tube are called scrappers. Which of the following conveying equipments comes under the category of 'scrappers'?

Both B and C
Flight conveyor
Screw conveyor
Bucket conveyor

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