MECHANICAL OPERATIONS QUIZ

Highly viscous liquids & pastes are agitated by

None of these

Propellers

Turbine agitators

Multiple blade paddles

TRUE ANSWER : ?
YOUR ANSWER : ?

Choke crushing (in case of a Jaw crusher) compared to free crushing

Consumes less power

Results in increased capacity

Consumes more power

Both A and C

TRUE ANSWER : ?
YOUR ANSWER : ?

Grinding characteristic of a material is given by its

Angle of repose

Abrasion index

HGI

Shatter index

TRUE ANSWER : ?
YOUR ANSWER : ?

Run of mine (ROM) coal is crushed by a __________ for use in domestic ovens.

Jaw crusher

Tube mill

Ball mill

Hammer crusher

TRUE ANSWER : ?
YOUR ANSWER : ?

Froth floatation is the most suitable for treating

Iron ores

Sulphide ores

Quartzite

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used for primary crushing of very hard lumpy materials?

Ball mill

Gyratory crusher

Tube mill

Toothed roll crusher

TRUE ANSWER : ?
YOUR ANSWER : ?

Sauter mean diameter is the same as the __________ mean diameter.

Arithmetic

Volume-surface

Geometric

Mass

TRUE ANSWER : ?
YOUR ANSWER : ?

If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is Φs is defined by

Φs = dp Sp/Vp

Φs = 6 dp Sp/Vp

Φs = Vp/dp sp

Φs = 6 Vp/dp sp

TRUE ANSWER : ?
YOUR ANSWER : ?

Cartridge filters are termed as 'edge' filters, because of the fact that the

Bulk of the solids are removed at the periphery of the disks

None of these

Solids are not deposited at the edge of the disk

Disks have very sharp edge

TRUE ANSWER : ?
YOUR ANSWER : ?

A belt conveyor used for the transportation of materials can

All of these

Travel at a speed upto 300 metres/minute

Run upto 1 km

Handle materials upto 5000 tons/hr

TRUE ANSWER : ?
YOUR ANSWER : ?

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