Q. Sphericity of raschig ring (whose length and diameter are equal) is

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Q. Mixing mechanism employed in a pan mixer is by

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Q. Chance process is used for the

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Q. Which of the following screens has the maximum capacity ?

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Q. Stamp mills are generally used for crushing

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Q. Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.

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Q. A filter press is

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Q. Xanthates are used in the froth floatation process as a/an

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Q. The ratio of the actual mesh dimension of Taylor series to that of the next smaller screen is

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Q. A propeller agitator

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Q. In a grinding operation, the limiting particle size is the size of the __________ particle in the sample.

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Q. Screen capacity is proportional to (where, S = screen aperture)

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Q. In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced.

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Q. Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?

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Q. Carbon black is pulverised in a

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Q. The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the

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Q. The filtrate flow rate in constant pressure filtration

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Q. Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m³ here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)

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Q. Vibrating screens are used for handling large tonnages of materials. The vibrating motion is imparted to the screening surface by means of

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Q. The inlet pressure in a constant rate filtration

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