Heat Transfer
The number of kg vaporised per kg of steam fed to the evaporator is defined as

Economy
Rate of evaporation
Capacity
Rate of vaporisation

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Heat Transfer
In a heat exchanger, one transfer unit means

None of these
Both A and B
A section of the exchanger in which change in temperature of one stream equals the average driving force in the section
The size of the exchanger in which heat transfer rate is 1 kcal/hr

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Heat Transfer
Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer can not take place

Between two bodies not in physical contact with each other
Both B & C
From one part of a body to the another part of the same body
Between two bodies in physical contact with each other

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