Correct answer
B. 18.7
Explanation
The correct answer is 18.7.
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is________?
For a first order chemical reaction, the concentration of the reactant decreases ________ with time?
Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be________?
The most important factor, which determines the maximum height to which water can be lifted by a pump at standard temperature is the________?
Widely used method for the conditioning of boiler feed water is the ________?
With increase in the oxygen content of the coal, its ________ decreases?