Water Technology Quiz 2 (11 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Water is hard when it contains:

Correct Answer: D) Dissolved Ca and Mg salts.

2. Scale formation in boilers causes

Correct Answer: B) Wastage of heat.

3. Ion-free water coming out from the exchanger is known as .....

Correct Answer: B) Demineralised water.

4. The role of silver sulphate in COD is

Correct Answer: C) Catalyst.

5. Water treatment process (seawater desalination) is opposite to natural osmosis is

Correct Answer: A) Reverse Osmosis.

6. What is the membrane that selectively allows certain species to pass through called?

Correct Answer: C) Semi-permeable membrane.

7. When the impure water is passed through anion exchange resin the anion of the impure water gets exchanged with

Correct Answer: A) OH- of anion.

8. Which of the following does not cause the permanent hardness in water?

Correct Answer: A) Bicarbonates.

9. Problems associated with scale and sludge formation

Correct Answer: D) All of these.

10. In ..... when the water is heated then the soluble salts turns into insoluble ones and removed by filtration.

Correct Answer: C) Temporary hardness.

11. Min pressure to be applied to prevent the water flow through semipermeable membrane

Correct Answer: D) Osmotic pressure.