Related Questions

During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration
A At time zero
B At the end of filtration
C When half the filtrate has been obtained
D At the end of filtration, but decreases with time subsequently
Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.
A Constant rate
B Varying pressure
C Varying rate
D Constant pressure
The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.
A Rate
B Pressure
C Both A & B
D Neither A nor B
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
A $$\frac{1}{2}$$w2.R2.ρL
B $$\frac{1}{2}$$w2.δ2.ρL
C $$\frac{1}{2}$$w2.δ.ρL(2R + δ)
D $$\frac{1}{2}$$w2.R.ρL(R + 2δ)
The rate of emission of radiation by a body does not depend upon the
A Wavelength of radiation
B Surface temperature of the body
C Nature of the surface
D Shape and porosity of the body
Heat transfer rate to the stock/charge in the furnace does not depend upon the
A Emissivity of the refactory walls
B Size of the furance
C Use of waste heat recovery equipments
D Thickness of the stock
Heat transfer rate to the charge/stock in a furnace does not depend upon the
A Type of fuels viz solid, liquid or gaseous
B Flue gas temperature
C Emissivity of refractory walls
D Initial temperature of the charged stock
Rate of crystallisation does not depend upon the
A Extent of supersaturation
B Turbulence within the solution
C Number and active surface area of the crystals
D None of these
If there are no externally induced flow velocities, then the Nusselt Number (Nu) does not depend upon
A Prandtl number
B Reynolds number
C Grashof Number
D none of the
When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon
A Resistance of the coil
B Motion of the magnet
C Number of turns of the coil
D Pole strength of the magnet

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