9 JANUARY 2021 CURRENT AFFAIRS QUIZ

The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be

Wi

0.5 Wi

3.34 Wi

1.34 Wi

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Tube mill

Ball mill

Toothed roll crusher

Gyratory crusher

TRUE ANSWER : ?
YOUR ANSWER : ?

Jigging is a technique by which different particles can be

Separated by particle size

Separated by particle shape

Separated by particle density

Mixed

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is the most suitable for compounding rubber and plastic solids.

Pan mixer

Pug mill

Banbery mixer

Charge can mixer

TRUE ANSWER : ?
YOUR ANSWER : ?

The opening of a 200 mesh screen (Taylor series) is

0.0047 cm

0.0074 mm

74 mili-microns

0.0074 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Blake jaw crusher

Cage mill

Bradford's breaker

Stamp mill

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is used for producing a thick suspension from a thin slurry.

Plate and frame filter press

Cartridge filter

Rotary drum vacuum filter

Pressure filter thickener

TRUE ANSWER : ?
YOUR ANSWER : ?

The speed of a rotary drum vacuum filter may be about __________ rpm.

1

100

50

500

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of specific cake resistance is

Gm/cm²

Gm/gm

Cm/gm²

Cm/gm

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ are used for the separation of coarse particles from a slurry of fine particles.

Classifiers

Decanters

Thickeners

Hydrocyclones

TRUE ANSWER : ?
YOUR ANSWER : ?

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