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Mechanical Operations

Mechanical Operations
Energy consumed for crushing one ton of material ranges from __________ kWh.

0.5 to 1.5
2 to 3.5
0.01 to 0.1
4 to 5

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Mechanical Operations
Which of the following is not a part of the Blake jaw crusher?

Toggles
Pitman
Check plates
Hanger

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Mechanical Operations
Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m³ here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)

3.6 V.W.Dr.ρ
3.6 V.W.Dr/ρ
3.6 W.Dr.ρ
3.6 V.W. ρ

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Mechanical Operations
Gold ore concentration is mostly done using

Tabling
Froth floatation
Elutriation
Jigging

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Mechanical Operations
Which of the following mineral dressing operations is termed as 'comminution'?

Panning
None of these
Spiralling
Tabling

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Mechanical Operations
Apron conveyors are used for

None of these
Heavy loads & short runs
Heavy loads & long runs
Small loads & long runs

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