A. Pressure drop across the cake & filter medium
B. Cake & filter medium resistance
C. Area of filtering surface & the viscosity of filtrate
D. All A., B. and C.
Related Mcqs:
- The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is____________________?
A. 0.25
B. 0.50
C. 0.75
D. 1.25 - High pressure fluid in a shell and tube heat exchanger should preferably be routed through the________________?
A. Tubes to avoid the expansion of high pressure shell construction
B. Shell side for smaller total pressure drop
C. Shell side, if the flow is counter-current and tube side if the flow is co-current
D. Shell side for large overall heat transfer co-efficient - For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec, ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches) ?
A. Di, opt = 3.9 Q0.45 ρ0.13
B. Di, opt = 3.9 Q0.45. μ0.95
C. Di, opt = 4.7 Q0.36. μ3.2ρ0.13
D. Di, opt = 3 Q0.36. μ0.88 - A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of_________________?
A. 2
B. 20.8
C. 20.2
D. None of these - Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to ____________________?
A. hG = 1.004G0.37
B. 1.004G0.8
C. hG = 0.0176G0.37
D. 0.0176G1.37 - Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate ?
A. Triangular pitch
B. Square pitch
C. Diagonal square pitch
D. Heat transfer rate is independent of tube arrangement - With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter___________________?
A. Increases
B. Decreases
C. Remain unaffected
D. None of these - If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will _____________ times?
A. Increase by 1.8
B. Decrease by 22
C. Increase by 21.6
D. None of these - Rate of filtrate delivery is inversely proportional to the___________________?
A. Filtering area & the pressure difference driving force
B. Viscosity of filtrate
C. Cake & filter medium resistance
D. Both A. and B. - In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to____________________?
A. ∞
B. 1
C. 20.8
D. 2
