DATA TYPES AND VARIABLES QUIZ

Mixing of light fine powder such as insecticides is done by

Banbery mixer

Pug mill

Impact wheels

Kneader

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals.

Concentration ratio

None of these

Separation efficiency

Selectivity index

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following gives the crushing energy required to create new surface ?

Fick's law

None of these

Taggarts rule

Rittinger's law

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ are mixed using ribbon blenders.

Thick pastes

High viscosity liquids

Dry powders

Lumpy solids and low viscosity liquids

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following may prove unsuitable for filtering volatile liquids?

Gravity filter

Pressure filter

Vacuum filter

Centrifugal filter

TRUE ANSWER : ?
YOUR ANSWER : ?

Bond crushing law

States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

Is less realistic in estimating the power requirements of commercial crushers

States that the work required for the crushing is proportional to the new surface created

Calls for relatively less energy for the smaller product particles, than does the Rittinger law

TRUE ANSWER : ?
YOUR ANSWER : ?

The process by which fine solids is removed from liquids is termed as

Classification

Sedimentation

Flocculation

Decantation

TRUE ANSWER : ?
YOUR ANSWER : ?

The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a

Sharpies centrifuge

None of these

Propeller agitator

Boundary mixer

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 : ?

In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is

4

1/4

1

1/2

TRUE ANSWER : ?
YOUR ANSWER : ?