Q. Production rate __________ with increased fineness, with a given energy input to the size reduction machine.

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Q. Gold ore concentration is mostly done using

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Q. Mixing of light fine powder such as insecticides is done by

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Q. Run of mine (ROM) coal is crushed by a __________ for use in domestic ovens.

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Q. Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity ?

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Q. A __________ mixer resembles a ball mill without balls.

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Q. __________ conveyor is the most suitable for short distance transportation of non-abrasive loose materials like garbage, grain, food wastes etc.

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Q. As the product becomes finer, the energy required for grinding

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Q. Gyratory crushers compared to the reciprocating jaw crushers

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Q. The important dimensional group involved in the power requirement calculation in mixing operation is the __________ number.

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Q. The reduction ratio for fine grinders is

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Q. Which of the following is the hardest material ?

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Q. General mechanism of size reduction in intermediate and fine grinder is by

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Q. A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for __________ flow of filtrate.

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Q. The work index in Bond's law for crushing of solids has the following dimensions

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Q. In bag filters, filter fabrics are never made of

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Q. Use of 'grinding aids' is done in __________ grinding.

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Q. Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)

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Q. Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?

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Q. All resistances during washing of cake

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