UNIT – I – WATER TREATMENT PROCESS:
PART – A ( 2 Marks)
1. Define hardness of water.
2. Distinguish between carbonate hardness and noncarbonate hardness.
3. Draw the structure of EDTA. What happens when EDTA is added to
hard water?
4. Define alkalinity.
5. Why is water softened before using in boiler?
6. What is meant by priming and foaming? How can they be prevented?
7. What is meant by caustic embrittlement? How is it prevented?
8. Indicate the reasons for boiler corrosion.
9. What is the role of phosphates in the internal treatment of water?
10. What is calgon conditioning? How is it functioning in water treatment?
11. Mention requisites of potable water.
12. Write briefly on disinfection of water by UV treatment.
13. Write the principle involved in the desalination of water by reverse
osmosis.
14. Define the term break-point chlorination.
15. Define desalination.
16. What is Sodium zeolite? What is its use?
HS1103- Engineering chemistry - I
Kings college of Engineering
PART – B ( 16 Marks)
1. (i) What is the principle of EDTA method? Describe the estimation of
Hardness of water by EDTA method. (8)
(ii) Describe De-Mineralization process of water softening. Explain the
Reactions involved with diagram. (8)
2. (i) Describe briefly the different steps in the purification of water for drinking
Purposes. (8)
(ii) What is desalination? Name the different methods of desalination. Explain
any one in detail. (8)
3. (i) Discuss briefly about the problems caused due to the usage of hard water
in boilers. (8)
(ii) What are Zeolites? How do they function in removing the hardness? (8)
4. (i) How is internal treatment of boiler water carried out? (8)
(ii) What is the various methods by which disinfection of domestic water is
carried out? Explain. (8)