MECHANICAL OPERATIONS QUIZ

The grinding in a hammer crusher takes place due to the

Both A & B

Neither A nor B

Impact

Attrition

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ centrifuge is normally used in sugar mills.

Disc-bowl

Tubular bowl

Perforated horizontal basket continuous

Suspended batch basket

TRUE ANSWER : ?
YOUR ANSWER : ?

Width and speed of a conveyor belt depends upon the __________ of the material.

Lump size

Both A & B

Neither A nor B

Bulk density

TRUE ANSWER : ?
YOUR ANSWER : ?

200 mesh screen means 200 openings per

Inch

Cm

Cm²

Inch²

TRUE ANSWER : ?
YOUR ANSWER : ?

During agitation of liquids, the

Froude number is independent for the curves between power number and Reynolds number in baffled system

Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller

All of these

Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not used as a surface active agent in a flocculation operation?

Quartz

Sodium silicate

Alumina

Lime

TRUE ANSWER : ?
YOUR ANSWER : ?

Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.

Filtering

Drying

Washing

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Gold ore concentration is mostly done using

Tabling

Froth floatation

Elutriation

Jigging

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ are mixed using ribbon blenders.

High viscosity liquids

Dry powders

Thick pastes

Lumpy solids and low viscosity liquids

TRUE ANSWER : ?
YOUR ANSWER : ?

In screen analysis, the notation +5 mm/-10 mm means particles passing through

5 mm screen and retained on 10 mm screen

Both 5 mm and 10 mm screens

10 mm screen and retained on 5 mm screen

Neither 5 mm nor 10 mm screen

TRUE ANSWER : ?
YOUR ANSWER : ?