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Mechanical Operations

Mechanical Operations
__________ mill is not used for grinding wheat into flour and for milling of cereals & other vegetable products.

Attrition
Buhrstone
Roller
Pebble

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Mechanical Operations
In a roll crusher, both the rolls

All of these
Have the same diameter
Run either at the same or different speeds
Are rotated towards each other

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Mechanical Operations
Optimum ratio of operating speed to critical speed of a trommel is

0.33-0.45
1.5-2.5
0.5-2
1.33-1.45

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Mechanical Operations
Introduction of slurry in a plate and frame filter press is done through a plate in each frame. The plate of this filter has a __________ surface.

Plane
Curved
Either A or B
Ribbed

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

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Mechanical Operations
Coal is finally pulverised to 200 mesh size for burning in boilers by a

Gyratory crusher
Ball mill
Hammer crusher
Roll crusher

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MORE MCQ ON Mechanical Operations

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