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Mechanical Operations

Mechanical Operations
Which of the following is a continuous filter?

None of these
Plate and frame filter
Shell and leaf filter
Cartridge filter

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Mechanical Operations
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: Po = 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.

Po ∝ Re-1.0
Po ∝ Re0.0
Po ∝ Re1.0
Po ∝ Re0.5

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Mechanical Operations
The ratio of the area of openings in one screen (Taylor series) to that of the openings in the next smaller screen is

1
None of these
?2
1.5

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Mechanical Operations
Size reduction does not occur due to compression in case of

Jaw crushers
Gyratory crushers
Smooth roll crushers
Rod mills

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Mechanical Operations
In case of a ball mill,

Fine feed requires a larger ball
Coarse feed requires a larger ball
Operating speed should be more than the critical speed
None of these

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Mechanical Operations
__________ mills fall in the category of tumbling mills,

Rod and tube
Compartment
Ball and pebble
All of these

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