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Mechanical Operations

Mechanical Operations
200 mesh seive size corresponds to __________ microns.

24
154
200
74

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Mechanical Operations
The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be __________ cms.

12
20
8
2

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Mechanical Operations
Size reduction does not occur due to compression in case of

Rod mills
Gyratory crushers
Jaw crushers
Smooth roll crushers

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Mechanical Operations
Sulphuric acid mist is arrested by using a __________ scrubber.

Co-current
Packed wet
Hollow wet
Venturi

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Mechanical Operations
During size reduction by a jaw crusher, the energy consumed decreases with the

Decreasing machine capacity
Increasing size of feed at constant reduction ratio
None of these
Decreasing size of product at constant size of feed

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Mechanical Operations
Which of the following can be most effectively used for clarification of lube oil and printing ink?

Sparkler filter
Disc-bowl centrifuge
Sharpies supercentrifuge
Precoat filter

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