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
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

½w² . R . ρL(R + 2δ)

½w² . δρL (2R + δ)

½w² . R² . ρL

½w² . δ² . ρL

½w² . R . ρL(R + 2δ)

½w² . δρL (2R + δ)

½w² . R² . ρL

½w² . δ² . ρL

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Mechanical Operations
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.

Thickness

None of these

Speed

Length

Thickness

None of these

Speed

Length

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Mechanical Operations
__________ mills are termed as impactors.

Hammer

None of these

Rolling-compression

Cage

Hammer

None of these

Rolling-compression

Cage

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Mechanical Operations
For a non-spherical particle, the sphericity

Has the dimension of length

Is the ratio of volume of a sphere having the same surface area as the particle to the actual volume of the particle

Is always less than 1

Is defined as the ratio of surface area of a sphere having the same volume as the particle to the actual surface area of the particle

Has the dimension of length

Is the ratio of volume of a sphere having the same surface area as the particle to the actual volume of the particle

Is always less than 1

Is defined as the ratio of surface area of a sphere having the same volume as the particle to the actual surface area of the particle

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Mechanical Operations
Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m³ here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)

3.6 V.W.Dr/ρ

3.6 V.W.Dr.ρ

3.6 V.W. ρ

3.6 W.Dr.ρ

3.6 V.W.Dr/ρ

3.6 V.W.Dr.ρ

3.6 V.W. ρ

3.6 W.Dr.ρ

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Mechanical Operations
The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a

Propeller agitator

Boundary mixer

Sharpies centrifuge

None of these

Propeller agitator

Boundary mixer

Sharpies centrifuge

None of these

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Mechanical Operations

Mechanical Operations The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.

Mechanical Operations __________ mills are termed as impactors.

Mechanical Operations For a non-spherical particle, the sphericity

Mechanical Operations The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a

Mechanical Operations
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.

Mechanical Operations
__________ mills are termed as impactors.

Mechanical Operations
For a non-spherical particle, the sphericity

Mechanical Operations
The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a