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Mechanical Operations

Mechanical Operations
Which of the following may prove unsuitable for filtering volatile liquids?

Centrifugal filter
Gravity filter
Vacuum filter
Pressure filter

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Mechanical Operations
Production rate __________ with increased fineness, with a given energy input to the size reduction machine.

Decreases
May increase or decrease; depends on the machine
Increases
Remains unchanged

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Mechanical Operations
Separation of isotopes is generally done using a/an __________ centrifuge.

Neither A nor B
Both A & B
Disk-bowl
Ultra

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Mechanical Operations
The reduction ratio for grinders is defined as(where, Df and Dp are average diameters of feed and product respectively).

Df/Dp
None of these
Dp/Df
Df - Dp

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Mechanical Operations
In constant pressure filtration,

Rate of filtration increases with time
Resistance decreases with time
Rate of filtration is constant
Rate of filtration decreases with time

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Mechanical Operations
Which of the following oxides is not present in hematite iron ore?

Titanium oxide
Calcium oxide
Cobalt oxide
Manganese oxide

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