Q201
Open questionWashability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the
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Chemical Engineering · all questionsMechanical Operations
Mechanical Operations
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440
Questions
11/22
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Q202
Open questionWhich of the following is the most suitable for handling fibrous and dense slurries?
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Q203
Open questionFor efficient grinding, ball mills must be operated
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Q204
Open questionRittinger's crushing law states that
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Q205
Open questionWork index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with __________ to get the same for dry grinding.
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Q206
Open questionThe value of 'angle of nip' is generally about
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Q207
Open questionA. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.
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Q208
Open questionWhat is the selectivity index, if the grade of tailings & concentrate is the same?
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Q209
Open questionSphericity of raschig ring (whose length and diameter are equal) is
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Q210
Open questionDuring size reduction by a jaw crusher, the energy consumed decreases with the
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Q211
Open questionSize reduction mechanism used in Jaw crushers is
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Q212
Open questionWidth and speed of a conveyor belt depends upon the __________ of the material.
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Q213
Open question__________ mills fall in the category of tumbling mills,
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Q214
Open questionIf radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the
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Q215
Open questionLaminar flow region is said to exist during agitation of a liquid in an agitator, when the value of Reynolds number is
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Q216
Open questionWheat is ground into flour in a
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Q217
Open questionWhich is a secondary crusher for a hard & tough stone?
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Q218
Open questionWhich of the following comes in the category of primary crusher for hard and tough stone?
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Q219
Open questionChoke crushing (in case of a Jaw crusher) compared to free crushing
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Q220
Open questionSphericity of pulverised coal is
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