Mechanical Operations

Derive Stoke's equation of motion of spherical particle under free settling.

With the help of neat diagram explain the construction and working of a cyclone separator and a hydro cyclone.

Write about magnetic separators and froth flotation cell in detail.

Write short note on:

Pneumatic conveying.

Write short note on:

Application of fluidization

Write short note on:

Belt conveyors

Write short note on:

Bin storage

Write a note on tumbling mixers.

A Disk turbine with 6 blades in a baffled tank 2m in diameter, turbine diameter of 0.67m positioned 0.67m above the tank bottom turbine blade width of 134mm, a depth of 2m with 50% NaOH solution, viscosity of 12cP, density of 1,500kg/m³, impeller speed of 90rpm, what power will be required? Assume K_T =5.75. 

What are the purposes of agitation? Write a note on standard turbine design.

Explain the working of a rotary drum filter with the help of a diagram.

Laboratory filtration conducted at constant pressure drop on a slurry of CaCo₃ in water gave the data as shown in the table. The filter area was 440cm². The mass of solids per unit volume of filtrate was 23.5 gm/. Evaluate specific cake resistance and medium resistance pressure drop = 0.456kgf/cm²,  for H₂O=0.886cP. 

Write a procedure to design a continuous thickener. 

A spherical steel ball of size 7.0mm take 06 seconds to fall through a distance of 23cm, in a viscous liquid. Find the kinematic viscosity of the liquid. Density of steel ball is 7900kg/m³ and that of liquid is 900 kg/m³

Write the expressions for indicating the notation :

i) Sphericity

Draw a neat labeled diagram of a Blake jaw crusher and explain construction and working.

The diameter of a set of rolls is 1.4m and accepts a feed of size equivalent to 5cm, if the angle of nip is 30°, what is the maximum size of the product? 

In the crushing of iron ore 80% of feed passes through 5mm screen and 80% of product passes through 0.5mm screen. If the product size has to be altered such that 80% of the same passes through 0.2mm screen. What is the percentages increase in power consumption?

Explain the working of vibrating screen.

With a neat sketch, explain the construction and working of a trammel screen.

Discuss on sedimentation and elutriation methods for sub sieve analysis.

Write a note on differential and cumulative size analysis.

With the material balance over a screen, deduce an equation for the calculation of effectiveness of a screen.

Write the expressions for indicating the notation :

v) Arithmetic mean diameter.

Write the expressions for indicating the notation :

iv) Specific surface of mixture of particles

Write the expressions for indicating the notation :

iii) Volume mean diameter

Write the expressions for indicating the notation :

ii) Number of particles in a mixture