The overall effectiveness of sieve equipment is the _____ of the effectiveness of the underflow and the overflow separately.

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The compression zone in batch sedimentation is considered the overflow.

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The clearance between the impeller and the vessel in a mixer is usually kept _____

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Gyratory screens are used when it is a continuous operation to be handled and the amount of material to be handled is very high.

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Statement 1: For calculating the minimum thickener area, the angle bisector method is used. Statement 2: In the angle bisector method, the point obtained the curve and the corresponding time is the time when the solids enter the compression zone.

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Statement 1: In the transient zone, the power input depends on the density and viscosity of the fluid. Statement 2: In the laminar zone, the power input depends on the density only. It is independent of the viscosity of the fluid.

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Statement 1: In both, centrifuge and sedimentation, the terminal velocity of the particle is reached after a certain time. Statement 2: The formula used for finding out the velocity is the same for both the processes.

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With respect to the relationship between the power number and the impeller Reynolds’s number, which amongst the following statements is true?

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Statement 1: Cranes and hoists have an incline up and down option. Statement 2: Trucks can be used for continuous operations.

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Statement 1: Bucket conveyors can be divided into close and spaced bucket conveyors. Statement 2: Bucket conveyors can be divided into centrifugal and positive discharge bucket conveyors.

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Statement 1: Kneaders are specially used for pastry/viscous liquids in the food industry. Statement 2: Kneaders are used for mixing dough with fats and making them homogeneous mixtures.

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In sedimentation, l – clear liquid zone, t- thick suspension zone, s- solid zone. With concentration of solids as the y-axis and the time as the x-axis, which curve does the following represent?

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