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Mechanical Operations

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

Size enlargement
Agitation
Humidification
Filtration

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Mechanical Operations
Which is a secondary crusher for a hard & tough stone?

Impact crusher
Cone crusher
Jaw crusher
Toothed roll crusher

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Mechanical Operations
Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation.

Sedimentation
Flocculation
Classification
Clarification

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Mechanical Operations
The filter medium resistance is controlled by

Pressure drop alone
Flow rate alone
Both pressure drop and flow rate
Cake thickness

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Mechanical Operations
Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their

None of these
Terminal velocities
Densities
Particle sizes

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Mechanical Operations
A cottrel precipitator makes use of the __________ for dusty air cleaning.

Alternating current
Corrona discharge
Electric spark
None of these

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