Q. In a size reduction crushing operation, feed size is 100 to 300 mm, while the product size is 10 to 50 mm. This is a case of the __________ crushing.

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Q. In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.

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Q. As per Taggart's formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms )

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Q. The process by which fine solids is removed from liquids is termed as

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Q. Which of the following crushing laws is most accurately applicable to the fine grinding of materials ?

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Q. Shell and leaf filter as compared to plate and frame filter

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Q. Pick out the wrong statement.

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Q. Which of the following oxides is not present in hematite iron ore?

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Q. Ribbon blenders are exclusively meant for

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Q. In closed circuit grinding as compared to open circuit grinding, the

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Q. Pick out the correct statement.

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Q. Separation of solid particles based on their densities is called

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Q. Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?

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Q. __________ are mixed using ribbon blenders.

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Q. During agitation of liquids, the

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Q. For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to

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Q. Traces of liquid tar fog present in coke oven gas is separated using

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Q. Close circuit grinding by a ball mill with air sweeping employs a

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Q. Work 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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Q. Choke crushing (in case of a Jaw crusher) compared to free crushing

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