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Mechanical Operations

Mechanical Operations
Which of the following is not categorised as a "mechanical operation"?

Size enlargement
Humidification
Agitation
Filtration

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Mechanical Operations
Which of the following is a vacuum filter?

Tank filter (Nutsch filter)
Batch basket centrifuge
Rotary disc filter
Filter press

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Mechanical Operations
Separation of solid particles based on their densities is called

Clarification
Dispersion
Sizing
Sorting

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Mechanical Operations
Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a __________ conveyor.

Ribbon
Drag
Screw
Slat

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Mechanical Operations
The critical speed of a trommel (N) is related to its dia (D) as

N ∝ 1/D
N ∝ 1/√D
N ∝ D
N ∝ √D

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Mechanical Operations
What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls?

1
0.66
2.76
0.5

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