In bag filters, filter fabrics are never made of metallic wire woven mesh polyes

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Question
In bag filters, filter fabrics are never made of
Options
A. metallic wire woven mesh
B. polyester fibres
C. cotton fibres
D. nylon fibres

Correct Answer

metallic wire woven mesh

Mechanical Operations problems

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3. Which of the following equations is Rittinger's crushing law? (where P = power required by the machine, m = feed rate, k = a constant = volume surface mean diameter of feed & product respectively.)
Options
A. P/m = K/D_p
B. P/m = K . ln
C. P/m = K .
D. none of these.

4. Reduction ratio of crushers is the
Options
A. ratio of feed opening to discharge opening.
B. ratio of discharge opening to feed opening.
C. determining factor for minimum dia of the feed and the product.
D. none of these.

7. Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid?
Options
A. Sand bed filter
B. Plate and frame filter press
C. Vacuum filter
D. Batch basket centrifuge.

9. Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines?
Options
A. Compartment mill
B. Rod mill
C. Pebble mill
D. Tube mill.

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