Question

1. In aerated tanks:-
(a). Solid wastes are separated.
(b). Organic matter is decomposed.
(c). Sludge is burnt.
(d). Wastewater is treated with chlorine.

2. The sludge from the settlement tank is shifted to another tank called:-
(a). Sedimentation tank.
(b). Aeration tank.
(c). Digester.
(d). Settlement tank.

3. In the final step, the wastewater is treated with:-
(a). Oxygen.
(b). Nitrogen.
(c). Carbon dioxide.
(d). Chlorine.

4. A septic tank is suitable for places having:-
(a). Clayey soil.
(b). Sandy soil.
(c). Scarce freshwater.
(d). Inadequate rainfall. ​

Answer 1

Answer:

1. A
2. C
3. D
4. A

Explanation:

hope it will helpful to you

Answer 2

Answer:

A

C

D

B

These questions are in my science book and I have solved them ..