MECHANICAL OPERATIONS QUIZ

Which of the following is not accomplished by agitation of liquids in agitators?

Dispersing gas in liquid

Blending of immiscible liquids

Suspending solid particles

Dispersing immiscible liquid in form of emulsion

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 : ?

In froth floatation, chemical agent added to cause air adherence is called

Frother

Collector

Modifier

Activator

TRUE ANSWER : ?
YOUR ANSWER : ?

Separation of isotopes is generally done using a/an __________ centrifuge.

Both A & B

Disk-bowl

Neither A nor B

Ultra

TRUE ANSWER : ?
YOUR ANSWER : ?

Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a __________ conveyor.

Slat

Screw

Drag

Ribbon

TRUE ANSWER : ?
YOUR ANSWER : ?

Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

Precoated on the filter medium prior to filtration

Separated from the cake by dissolving solids or by burning it off

Added to the feed slurry

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Mixer used for rubber compounding is

Banbury internal mixer

Muller mixer

Pug mill

Mixer-extruder

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

Tabling

Panning

Spiralling

TRUE ANSWER : ?
YOUR ANSWER : ?

In screen analysis, the notation +5 mm/-10 mm means particles passing through

Neither 5 mm nor 10 mm screen

10 mm screen and retained on 5 mm screen

5 mm screen and retained on 10 mm screen

Both 5 mm and 10 mm screens

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following crushing laws is most accurately applicable to the fine grinding of materials ?

None of these

Rittinger's law

Kick's law

Bond's crushing law

TRUE ANSWER : ?
YOUR ANSWER : ?

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