A . 'Solvates' are chemical compounds formed by solute with their solvents. When water is the solvent, then it is called a 'hydrate'.
B . In heat exchanger calculations (`Delta`t)weighted is used in place of `Delta`t, when it involves more than one sequence of heating or cooling i.e., desuperheating & condensation or condensation & sub-cooling.
C . Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted.
D . In case of short tube vertical evaporators, area of central downtake is about 50 to 100% of the total tube cross-sectional area.
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