Question

Qs
A. Tick() the correct option.
1. Which of these is not wastewater?
a. Sink water
b. Toilet water
c. Tap water
d. Water used in washing machines
2. Sedimentary tanks are found in
a. manhole
b. primary treatment stage
c. secondary treatment stage
d. tertiary treatment stage
3. In primary treatment, sewage is first passed through
a. bar screens
b. sedimentation tank c. clarifier
d. skimmer
4. The nature of tertiary treatment is
a. physical
b. chemical
c biological
d. manual
5. The solid matter produced during sewage treatment is
a. sludge
b. humus
c. scum
d. fertiliser
6. Which of the following is not a method of sludge disposal?
a. Incinerating
b. Dewatering
c. Solid composting d. Aeration
7. Improper management of sewage results in
a. diseases
b. water pollution
c. contamination of water supply
d. all of the above
8. The water left after removing sludge and grease is called
a. black water
b. grey water
c. darified water
d. activated sludge water​

Answer 1

1.

b) toilet water

2.

b) primary treatment stage

3.

Answer 2

Answer:

1. Toilet Water

2. Secondary treatment stage

3. Bar screen

4. Manual

5. Sludge

6. Solid composting

7. Water Pollution

8. Activated sludge water

1 Answer - b

2 Answer - c

3 Answer - a

4 Answer - d

5 Answer - a

6 Answer - c

7 Answer - b

8 Answer - d

I hope it helps ☺️