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Mechanical Operations

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

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

A. Boundary mixer
B. Propeller agitator
C. Sharpies centrifuge
D. None of these

The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a __________________? Read More »

Mechanical Operations

In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________?

Mechanical Operations /
In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________?

A. Square root of the velocity
B. Square of the viscosity
C. Filtration time only
D. Washing time only

In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________? Read More »

Mechanical Operations

Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ?

Mechanical Operations /
Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ?

A. S
B. 1/R
C. 1/μ
D. All A., B. & C.

Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ? Read More »

Mechanical Operations

Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________?

Mechanical Operations /
Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________?

A. kW. sec/kg
B. kWh/kg
C. kWh/sec. kg
D. kg/sec

Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________? Read More »

Mechanical Operations

Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about________________?

Mechanical Operations /
Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about________________?

A. 1 to 2°
B. 2 to 5°
C. 5 to 10°
D. 10 to 15°

Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about________________? Read More »

Mechanical Operations