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Mechanical Operations

Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?

Mechanical Operations /
Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?

A. Sand bed filter
B. Plate and frame filter press
C. Vacuum filter
D. Batch basket centrifuge

Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ? Read More »

Mechanical Operations

Bond crushing law_________________?

Mechanical Operations /
Bond crushing law_________________?

A. Calls for relatively less energy for the smaller product particles, than does the Rittinger law
B. Is less realistic in estimating the power requirements of commercial crushers
C. States that the work required to form particle of any size from very large feed is proportional
to the square root of the volume to surface ratio of the product
D. States that the work required for the crushing is proportional to the new surface created

Bond crushing law_________________? Read More »

Mechanical Operations

Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle)?

Mechanical Operations /
Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle)?

A. 6.V/D.S
B. V/6D.S
C. D.S/V
D. V/D.S

Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle)? Read More »

Mechanical Operations

A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _______________ flow of filtrate?

Mechanical Operations /
A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _______________ flow of filtrate?

A. Compressible cakes and laminar
B. Incompressible cake and laminar
C. Compressible cake and turbulent
D. Incompressible cake and turbulent

A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _______________ flow of filtrate? Read More »

Mechanical Operations

Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?

Mechanical Operations /
Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?

A. 1.0
B. 0.5
C. 1.34
D. 4.34

Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding? Read More »

Mechanical Operations