- (A) High vacuum in the evaporator
- (B) High evaporation rate
- (C) Foaming of the solution
- (D) High heat transfer rate
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- (A) Provide very large heat transfer co-efficient
- (B) Results in making part of the heating surface inactive
- (C) Results in abruptly increased velocity
- (D) None of these
- (A) Conduction
- (B) Natural convection
- (C) Forced convection
- (D) None of these
- (A) 1
- (B) < 1
- (C) > 1
- (D) None of these
- (A) Heat exchanger
- (B) Condenser
- (C) Multiple effect evaporator
- (D) Steam jacketed kettle
- (A) < 1
- (B) > 1
- (C) 1
- (D) ∞
- (A) Nitrogen
- (B) Steel
- (C) Carbon black
- (D) Tar
- (A) Absorptivity = 1
- (B) Reflectivity = 1
- (C) Emissivity = 0
- (D) Transmissivity = 1
- (A) High pressure
- (B) Vacuum
- (C) Backward feed
- (D) None of these
- (A) Condensation of the saturated vapor on a cold surface
- (B) Concentration of a corrosive solution by evaporation
- (C) Heat transfer between two highly viscous liquids
- (D) Boiling of a liquid on a hot surface
