Mechanical Operations

Trommels employ _____________ for screening of materials?

Byadmin February 18, 2019August 23, 2021

Trommels employ _____________ for screening of materials?

A. Fibrous cloth
B. Woven wire screen
C. Punched plate
D. None of these

Mechanical Operations

The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)__________________?

The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)__________________?

A. ∝ ΔP
B. ∝ 1/ ΔP
C. ∝ √ΔP
D. Independent of ΔP

Read More The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)__________________?
Mechanical Operations

What is the selectivity index, if the grade of tailings & concentrate is the same ?

What is the selectivity index, if the grade of tailings & concentrate is the same ?

A. 0
B. ∞
C. 1
D. 0.5

Read More What is the selectivity index, if the grade of tailings & concentrate is the same ?
Mechanical Operations

Filtration of water in a paper mill is done by a/an _______________ filter?

Filtration of water in a paper mill is done by a/an _______________ filter?

A. Open sand
B. Plate and frame
C. Vacuum leaf
D. Sparkler

Read More Filtration of water in a paper mill is done by a/an _______________ filter?
Mechanical Operations

Which of the following minerals is not subjected to magnetic separation method ?

Which of the following minerals is not subjected to magnetic separation method ?

A. Rutile
B. Galena
C. Chromite
D. Siderite

Read More Which of the following minerals is not subjected to magnetic separation method ?
Mechanical Operations

In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of _______________ crushing?

In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of _______________ crushing?

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

Read More In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of _______________ crushing?
Mechanical Operations

Which of the following terminology is not used for size reduction of materials to fine sizes or powders ?

Which of the following terminology is not used for size reduction of materials to fine sizes or powders ?

A. Comminution
B. Dispersion
C. Pulverisation
D. Compression

Read More Which of the following terminology is not used for size reduction of materials to fine sizes or powders ?

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