Mechanical Operations

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

Byadmin February 18, 2019August 22, 2021

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

Mechanical Operations

The sphericity of a solid particle of cubical shape is ___________________?

The sphericity of a solid particle of cubical shape is ___________________?

A. π
B. (π/6)1/3
C. (π/6)1/2
D. π/3

Read More The sphericity of a solid particle of cubical shape is ___________________?
Mechanical Operations

Size reduction of ice and gypsum can be accomplished suitably by a _______________ crusher?

Size reduction of ice and gypsum can be accomplished suitably by a _______________ crusher?

A. Blake jaw
B. Toothed roll
C. Gyratory
D. None of these

Read More Size reduction of ice and gypsum can be accomplished suitably by a _______________ crusher?
Mechanical Operations

Which of the following mechanical conveyors does not come under the division „scrapers‟ ?

Which of the following mechanical conveyors does not come under the division „scrapers‟ ?

A. Ribbon conveyor
B. Flight conveyor
C. Bucket elevators
D. Drag conveyor

Read More Which of the following mechanical conveyors does not come under the division „scrapers‟ ?
Mechanical Operations

The speed of a rotary drum vacuum filter may be about _____________ rpm?

The speed of a rotary drum vacuum filter may be about _____________ rpm?

A. 1
B. 50
C. 100
D. 500

Read More The speed of a rotary drum vacuum filter may be about _____________ rpm?
Mechanical Operations

A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?

A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?

A. ½w2 . R2 . ρL
B. ½w2 . δ2 . ρL
C. ½w2 . δρL (2R + δ)
D. ½w2 . R . ρL(R + 2δ)

Read More A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?
Mechanical Operations

Critical speed of rotation, N (in rps – rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec2 and, r = radius of trammel, metre.) ?

Critical speed of rotation, N (in rps – rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec2 and, r = radius of trammel, metre.) ?

A. (1/2π). √(g/r)
B. (1/π). √(g/r)
C. ½ √(g/r)
D. 2π. √(g/r)

Read More Critical speed of rotation, N (in rps – rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec2 and, r = radius of trammel, metre.) ?

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