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Mechanical Operations

Mechanical Operations
For the preliminary breaking of hard rock, we use a

Squirrel-cage disintegrator
Gyratory crusher
Tube mill
Ball mill

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Mechanical Operations
A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is

None of these
0.4
0.6
0.1

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

Cone crusher
Jaw crusher
None of these
Gyratory crusher

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

Calcium oxide
Manganese oxide
Cobalt oxide
Titanium oxide

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Mechanical Operations
For coarse reduction of hard solids, use

Compression
Attrition
Impact
Cutting

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Mechanical Operations
Limestone is normally crushed in a

Hammer crusher
Tube mill
Ball mill
Roll crusher

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