MECHANICAL OPERATIONS QUIZ

Percentage of drum submerged in the slurry in case of rotary drum filter is

25

3

85

30

TRUE ANSWER : ?
YOUR ANSWER : ?

Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the

Bradford's breaker

Blake jaw crusher

Stamp mill

Cage mill

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ mill is normally used for grinding of talc.

Compartment

Tube

Pebble

Ring-roll

TRUE ANSWER : ?
YOUR ANSWER : ?

Cake resistance is

Important in the beginning of filtration

Independent of pressure drop

None of these

Decreased with the time of filtration

TRUE ANSWER : ?
YOUR ANSWER : ?

Ball mill is used for

Attrition

Coarse grinding

Crushing

Fine grinding

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YOUR ANSWER : ?

Addition of filter aid to the slurry before filtration is done to ...... of the cake.

Increase the porosity

Decrease the compressibility co-efficient

Increase the compressibility co-efficient

Decrease the porosity

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?

Fluid energy mill

Jet mills

Micronizer

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called

Classification

Decantation

Sedimentation

Clarification

TRUE ANSWER : ?
YOUR ANSWER : ?

Filtration rate does not depend upon the

Properties of the cake & the filtrate

Resistance of the cake & the septum

Pressure drop & area of filtering surface

None of these

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Which of the following is a vacuum filter?

Tank filter (Nutsch filter)

Batch basket centrifuge

Filter press

Rotary disc filter

TRUE ANSWER : ?
YOUR ANSWER : ?

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