MECHANICAL OPERATIONS QUIZ

For efficient grinding, ball mills must be operated

At a speed less than the critical speed

With minimum possible small balls

At a speed more than the critical speed

At a speed equal to the critical speed

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YOUR ANSWER : ?

Which of the following agitators having a large blade area, rotating at slow speed is used for mixing high viscosity liquids ( > 50000 centipoise)?

Propeller

Flat blade turbine

Curved blade turbine

Helical screw

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Tank filter (e.g., Nutsch filter) is

A high pressure filter

A leaf filter

Used for small scale filtration work

A continuous filter

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The reduction ratio for fine grinders is

44124

As high as 100

20-40

43961

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Separation of solid particles based on their densities is called

Clarification

Sorting

Sizing

Dispersion

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YOUR ANSWER : ?

Cyclones are used primarily for separating

Solids

Solids from solids

Liquids

Solids from fluids

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

Blending of immiscible liquids

Dispersing immiscible liquid in form of emulsion

Dispersing gas in liquid

Suspending solid particles

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Hot, lumpy & abrasive materials are best transported by using a/an __________ conveyor.

Screw

Belt

Apron

Flight

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With increase in drum speed, in a rotary drum filter, the filtration rate

Increases linearly

Is not affected

Decreases

Increases

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Separation of materials into products based on the difference of their sizes is called

Sorting

Flocculation

Sizing

Classification

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YOUR ANSWER : ?

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