A. Agitated film evaporator
B. Long tube vertical evaporator
C. Short tube evaporator
D. Calandria
Related Mcqs:
- H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?
A. 2.0
B. 1.56
C. 1.0
D. 0.56 - The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?
A. NSc = 1
B. NSc = NPr = NLe
C. NPr = NLe
D. NSc = NLe - _____________ extractor is used for the concentration of radioactive nuclear waste?
A. Pulsed column
B. Sieve plate
C. Mixer-settler
D. Bollman - In case of constant underflow extraction operation, the _______________________ at all solute concentration?
A. Solids are drained to the same extent
B. Ratio of the insoluble to solution is constant
C. Both A. & B.
D. Neither A. nor B. - The suitable evaporator for concentration of foaming liquids is a ______________________ evaporator?
A. Long tube
B. Short tube
C. Vacuum
D. Falling film - At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbent __________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially - With increase in the concentration of the adsorbate, the integral heat of adsorption____________________?
A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease; depends on the type of adsorbate - When the liquid over a plate is of uniform concentration, then ______________________?
A. Murphree efficiency > point efficiency
B. Murphree efficiency < point efficiency
C. Murphree efficiency = point efficiency
D. Murphree efficiency ≠ point efficiency - The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are __________________?
A. Parallel
B. Straight
C. Both parallel and straight
D. Neither parallel nor straight - At equilibrium the concentration of water in vapour phase (C*) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is_________________?
A. 0.0
B. 0.2
C. 0.4
D. 1.0
