Question

What is the main objective beyond treating feed water?

(a) To remove solid particle

(b) To prevent damage by scaling

(c) To speed up the steaming process

(d) To control conductivity

This question was posed to me in homework.

My question comes from Feed Water and Steam Generation System, Working of Thermal Power Plant topic in portion Steam Power Plant of Energy Engineering

Answer 1

Right choice is (b) To prevent damage by scaling

To explain: The main objective to treat feed water is to prevent damage by scaling and exchange heat without scaling to produce high quality steam. Since a high amount of water is converted into steam back and forth, there is pretty good chance of scale formation in the tubes if the water is not treated.