Q. Width and speed of a conveyor belt depends upon the __________ of the material.

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Q. Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for

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Q. Pick out the wrong statement.

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Q. Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?

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Q. Tank filter (e.g., Nutsch filter) is

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Q. Which of the following gives the crushing energy required to create new surface ?

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Q. In filtration, the use of 'filter aid' helps in

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Q. Gizzlies are used for separating __________ solids.

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Q. Which of the following clay mixing devices is vacuum operated for deairation of clay?

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Q. Pick out the material having minimum Rittinger's number.

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Q. __________ mills are termed as impactors.

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Q. In case of a revolving mill, wet grinding compared to dry grinding

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Q. To get a fine talc powder from its granules, the equipment used is

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Q. For a cyclone of diameter 0.2 m with a tangential velocity of 15 m/s at the wall, the separation factor is

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Q. At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied:

P₀ = ρ/ρN³ D⁵ : Power number
Re = ρ N D²/μ: Reynold's number

N is the impeller rotational speed, and D is the impeller diameter.

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Q. Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines ?

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Q. Rittinger's crushing law states that

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Q. Mechanical conveyors which push the material along an endless trough or tube are called scrappers. Which of the following conveying equipments comes under the category of 'scrappers' ?

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Q. Sphericity of pulverised coal is

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Q. In a ball mill, the volume occupied by the balls (when the mill is stopped) is about __________ percent of the volume of the mill.

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