Related Questions

The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
A P, Q and R
B P and R
C R and S
D P, R and S
Addition of filter aid to the slurry before filtration is done to ...... of the cake.
A Increase the porosity
B Increase the compressibility co-efficient
C Decrease the porosity
D Decrease the compressibility co-efficient
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these
The inlet pressure in a constant rate filtration
A Increases continuously
B Decreases gradually
C Remains constant
D None of these
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
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)
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
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
The ratio of the discharge pressure to the inlet pressure of air is called
A Compression ratio
B Expansion ratio
C Compressor efficiency
D Volumetric efficiency
The military operation carried out by the Pakistan Army in the erstwhile East Pakistan in March 1971 was named operation
A Searchlight
B Jackpot
C Blitz
D Jinnah

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