Mechanical Operations

The process opposite to ‘dispersion’ is termed as the___________________?

Byadmin February 18, 2019August 23, 2021

The process opposite to ‘dispersion’ is termed as the___________________?

A. Flocculation
B. Sedimentation
C. Filtration
D. None of these

Mechanical Operations

In bag filters, filter fabrics are never made of__________________?

In bag filters, filter fabrics are never made of__________________?

A. Metallic wire woven mesh
B. Polyester fibres
C. Cotton fibres
D. Nylon fibres

Read More In bag filters, filter fabrics are never made of__________________?
Mechanical Operations

For laminar flow of filtrate through the cake deposited on septum, which of the following will be valid ?

For laminar flow of filtrate through the cake deposited on septum, which of the following will be valid ?

A. Kozeny-Carman equation
B. Leva’s equation
C. Blake-Plummer equation
D. None of these

Read More For laminar flow of filtrate through the cake deposited on septum, which of the following will be valid ?
Mechanical Operations

Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?

Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?

A. < 5
B. 10 to 25
C. < 74
D. > 1000

Read More Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?
Mechanical Operations

What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?

What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?

A. 16°
B. 32°
C. 40°
D. 46°

Read More What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?
Mechanical Operations

General crushing equation is given by d(P/m) = -K (dD̅ S/D̅ n S). Bond’s crushing law is obtained by solving this equation for n = _____________ and feed of infinite size?

General crushing equation is given by d(P/m) = -K (dD̅ S/D̅ n S). Bond’s crushing law is obtained by solving this equation for n = _____________ and feed of infinite size?

A. 1
B. 1.5
C. 2
D. 2.5

Read More General crushing equation is given by d(P/m) = -K (dD̅ S/D̅ n S). Bond’s crushing law is obtained by solving this equation for n = _____________ and feed of infinite size?
Mechanical Operations

Trommels are revolving screens which normally operate in the range of _______________ rpm?

Trommels are revolving screens which normally operate in the range of _______________ rpm?

A. 1 – 2
B. 15 – 20
C. 40 – 50
D. 60 – 75

Read More Trommels are revolving screens which normally operate in the range of _______________ rpm?

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