Which of the following may prove unsuitable for filtering volatile liquids ?
A. Pressure filter
B. Gravity filter
C. Centrifugal filter
D. Vacuum filter
Mechanical Operations
The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a __________________?
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
To remove dirt from the flowing fluid, we use a ____________________?
To remove dirt from the flowing fluid, we use a ____________________?
A. Coagulant
B. Gravity settler
C. Strains
D. Clarifier
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
In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________?
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
Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ?
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.
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_________________?
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
To get ultrafine particles, the equipment used is a _________________?
To get ultrafine particles, the equipment used is a _________________?
A. Ball mill
B. Rod mill
C. Hammer crusher
D. Fluid energy mill
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________________?
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°
Tube mill compared to ball mill_______________________?
Tube mill compared to ball mill_______________________?
A. Produces finer products
B. Is long in comparison with its diameter
C. Uses smaller balls
D. All A., B. & C.