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Mechanical Operations

Mechanical Operations
Out of the following size reduction equipments, the maximum feed size can be accepted by the

Ball mill
Jaw crusher
Jet pulveriser
Tube mill

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Mechanical Operations
Feed size of ≥ 25 cms can be accepted by

Jaw crusher
Rod mill
Ball mill
Fluid energy mill

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Mechanical Operations
Wheat is ground into flour in a

Roller crusher
Impact mill
Hammer crusher
Fluid energy mill

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Mechanical Operations
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)

D
2 D
1.5 D
0.5 D

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Mechanical Operations
Reduction ratio of crushers is the

Ratio of discharge opening to feed opening
None of these
Determining factor for minimum dia of the feed and the product
Ratio of feed opening to discharge opening

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Mechanical Operations
Which of the following is a vacuum filter?

Tank filter (Nutsch filter)
Rotary disc filter
Filter press
Batch basket centrifuge

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