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Mechanical Operations

Mechanical Operations
Which of the following comes in the category of primary crusher for hard and tough stone?

None of these
Gyratory crusher
Cone crusher
Jaw crusher

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Mechanical Operations
Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm)

0.01 L.S
L.S
0.087 L.S
L.S/0.087

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Mechanical Operations
Toothed roll crushers achieve size reduction by

Tearing (shear) and compression
Neither A nor B
Impact and attrition
Both A & B

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Mechanical Operations
Ultracentrifuges running at speeds upto 100000 rpm is normally used for the

Separation of isotopes based on their density or molecular weights difference
Separation of cream from milk
Concentration of rubber latex
Dewaxing of lubricating oil

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Mechanical Operations
In a roll crusher, the specific power consumption and the production rate is affected by the

Both A & B
Differential roll speed
Reduction ratio
Neither A nor B

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Mechanical Operations
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.

Thickness
Speed
Length
None of these

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