Environmental Engineering Practice Test 1

1. One degree of hardness is equivalent to ___ ppm.

2. Organic contaminants are removed from the water by the process of ______

3. Flocculation of iron from water by the addition of lime is an example of which of the following process?

4. Settling tank efficiency is reduced by _______
i. Eddy current
ii. Surface current
iii. Density current

5. In which unit operation, gases are released or absorbed in the water?

6. Logistic method is also called as _______

7. Which of the following statement is wrong regarding turbidity?

8. In which type of settling, sedimentation of discrete particles takes place?

9. In which process, excess lime is converted into bicarbonate?

10. Carbonate hardness can be removed by adding lime to water.