A. Rotary
B. Cylinder
C. Drum
D. Freeze
Correct Answer: Rotary ✔
Last Updated: February 16, 2019
Related MCQs
- During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant ?
- Fractional solvent extraction__________?
- The ratio of Murphree plate efficiency to point efficiency is always > 1 in a __________ flow model?
- In a packed bed absorption column, the channelling will be noted by the __________?
- Mass transfer co-efficient ‘K’ according to penetration theory varies with mass diffusivity as__________?
- A binary mixture of benzene and cyclohexane is separated by__________?
- Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the__________?
- The expression, y(1 – x)/x(1 – y) is for__________?
- In McCabe-Thiele method, at infinite reflux ratio__________?
- Weeping in a distillation column__________?
- The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model?
- The process employing desorption of the absorbed solute by a solvent is called__________?
- Plate efficiency__________?
- Diameter of raschig rings used in packed tower in industry is normally around __________ inches?
- In rectifying section of a continuous distillation column, the__________?
- The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives__________?
- In Azeotropic mixture, the equilibrium vapour composition is__________?
- Which of the following has the same dimension as mass diffusivity ?
- Which of the following decreases during evaporative cooling process with recirculated water supply ?
- At what percentage (by volume) of alcohol composition, it forms an azeotrope with water ?
- It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%) ?
- Steam distillation is not recommended to be used, if the __________?
- Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele’s method ?
- During constant rate period, the rate of drying decreases with the__________?
- Packed column distillation is limited to the column __________ metres?
- In case of constant underflow extraction operation, the __________ at all solute concentration?
- According to Poiseuille’s law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)__________?
- Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the__________?
- Pick out the correct relationship. (Where, Ri = internal reflux ratio Ro = external reflux ratio.) ?
- The humid volume may be increased by increasing the__________?
- Tower diameter may be decreased by__________?
- Raschig ring made of porcelain cannot be used for treating concentrated__________?
- Use of natural draft cooling tower is practised, when the air has low ?
- Molecular diffusivity of a liquid__________?
- At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent.?
- All moisture in a non-hygroscopic material is the __________ moisture?
- The value of NA/(NA + NB) for steady state molecular diffusion of gas ‘A’ through nondiffusing gas ‘B’ is__________?
- Molecular distillation is__________?
- The most efficient cooling tower out of the following is__________?
- The main reason for dividing a tall packed tower into series of small towers is to__________?
- Acetic acid will be most economically separated from a dilute solution of acetic acid in water by__________?
- Which of the following is not a batch drier ?
- The reflux to a distillation column is 100 moles/hr, when the overhead product rate is 50 moles/hr. The reflux ratio is__________?
- Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature ?
- With increase in temperature, the rate of leaching increases, because the__________?
- Leaching rate is independent of the__________?
- Sodium bicarbonate is produced during soda ash manufacture using a __________ tower?
- The cooling effect in a cooling tower cannot be increased by__________?
- For a single component absorber, the operating line is straight only when plotted in term of __________ units?
- Dimension of mass diffusivity is the same as that of__________?
- The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp= M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force) ?