MECHANICAL OPERATIONS QUIZ

The specific surface of sherical particles is proportional to (where, Dp = diameter of particle).

D²p

1/D²p

1/Dp

Dp

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a part of the Blake jaw crusher?

Toggles

Check plates

Hanger

Pitman

TRUE ANSWER : ?
YOUR ANSWER : ?

Gravity settling process is not involved in the working of a

Dorr-thickener

Hydrocyclone

Sedimentation tank

Classifier

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Rotary drum vacuum filter

Plate and frame filter press

Cartridge filter

Pressure filter thickener

TRUE ANSWER : ?
YOUR ANSWER : ?

Rod mills employed for grinding

Employ a steel shell having L/D ratio of 1.5 to 3.0

Employ steel rods of 2-12 cms diameter extending over full length of the mill

All of these

Is useful for handling sticky materials

TRUE ANSWER : ?
YOUR ANSWER : ?

In a roll crusher, both the rolls

Are rotated towards each other

Run either at the same or different speeds

Have the same diameter

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The process opposite to 'dispersion' is termed as the

Filtration

Sedimentation

Flocculation

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is

0.62

0.58

0.5

0.68

TRUE ANSWER : ?
YOUR ANSWER : ?

Grindability of a material does not depend upon its

Elasticity

Toughness

Size

Hardness

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a continuous filter?

Cartridge filter

Plate and frame filter

None of these

Shell and leaf filter

TRUE ANSWER : ?
YOUR ANSWER : ?

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