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Mechanical Operations

Mechanical Operations
Which is the most suitable conveyor for transportation of sticky material?

Belt conveyor
Apron conveyor
Pneumatic conveyor
Screw conveyor

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Mechanical Operations
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?

Sodium carbonate
Cresylic acid
Calcium carbonate
Copper sulphate

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Mechanical Operations
For transporting pasty material, one will use a/an

Apron conveyor
Screw colaveyor
Bucket elevator
Belt conveyor

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Mechanical Operations
Screw conveyors are

Run at very high rpm
All of these
Suitable for highly abrasive materials
Suitable for sticky materials

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Mechanical Operations
In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced.

Middling
Tailing
None of these
Concentrate

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Mechanical Operations
Which of the following must be stored in silos and not in open yard?

High V.M. bituminous coal
Coke breeze
Sand
None of these

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