Mechanical Operations

Temperature of the product during ultrafine grinding_____________________?

Byadmin February 18, 2019August 23, 2021

Temperature of the product during ultrafine grinding_____________________?

A. Increases
B. Decreases
C. Remain constant
D. May increase or decrease; depends on the material being ground

Mechanical Operations

For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to __________________?

For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to __________________?

A. The new surface created
B. The size reduction ratio
C. The change in volume due to crushing
D. None of these

Read More For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to __________________?
Mechanical Operations

Which of the following is not an industrial screening equipment ?

Which of the following is not an industrial screening equipment ?

A. Sharpies centrifuge
B. Vibrating screen
C. Grizzly
D. Trommel

Read More Which of the following is not an industrial screening equipment ?
Mechanical Operations

In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?

In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?

A. Primary
B. Secondary
C. Fine
D. Ultrafine

Read More In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?
Mechanical Operations

A propeller agitator_______________?

A propeller agitator_______________?

A. Produces mainly axial flow
B. Is used for mixing high viscosity pastes
C. Runs at very slow speed (2 rpm)
D. All A., B. and C.

Read More A propeller agitator_______________?
Mechanical Operations

During agitation of liquids, power consumption during laminar flow is not proportional to the ________________?

During agitation of liquids, power consumption during laminar flow is not proportional to the ________________?

A. Density of the liquid
B. Viscosity of the liquid
C. Cube of impeller diameters
D. Square of rotational speed

Read More During agitation of liquids, power consumption during laminar flow is not proportional to the ________________?
Mechanical Operations

The most common filter aid is_________________?

The most common filter aid is_________________?

A. Diatomaceous earth
B. Calcium silicate
C. Sodium carbonate
D. Silica gel

Read More The most common filter aid is_________________?

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