Class Notes NCERT Solutions for CBSE Students
NCERT 7th Class (CBSE) Science: Wastewater Management – Quiz
24 Multiple Choice Questions related to NCERT 7th Class (CBSE) Science: Wastewater Management – Quiz:
- Waste water from houses, industries, hospitals etc. and lain water that runs over land containing waste matter such as excreta.
- It is necessary to treat sewage treatment. It is necessary because if we put the same water in water bodies, it can cause harm to human and aquatic life.
- Sludge can be incinerated in incinerator tanks in which sludge becomes oshes. Ashes are used for construction purpose and suppliants nutrients to of the soil.
Quiz: Wastewater Management
Wastewater or sewage is produced due to human activities and natural causes like rain. The main contribution to sewage is from activities like bathing, sanitary needs, cooking, washing clothes, utensils, vehicles and farming.
- Question 1 of 24
1.
In the second step of the wastewater treatment plant, the speed of the incoming wastewater is decreased to _________
Correct
Wrong! Correct answer is All of the above
- Question 2 of 24
2.
Which one of the following is not a method of sewage disposal?
Correct
Wrong! Correct answer is Composing pits
- Question 3 of 24
3.
Which of the following can be used in the production of biogas?
Correct
Wrong! Correct answer is Activated sludge
- Question 4 of 24
4.
Which one of the following is used in disinfection of wastewater?
Correct
Wrong! Correct answer is Chlorine
- Question 5 of 24
5.
Which of the following is an organic contaminant?
Correct
Wrong! Correct answer is Food waste
- Question 6 of 24
6.
Which of the following is waste water?
Correct
Wrong! Correct answer is Water coming out of a laundry
- Question 7 of 24
7.
Sewage is mainly a _______
Correct
Wrong! Correct answer is Liquid waste
- Question 8 of 24
8.
Which of the following is/are products of wastewater treatment?
Correct
Wrong! Correct answer is Both biogas and sludge
- Question 9 of 24
9.
Open drain system is a breeding place for which of the following.
Correct
Wrong! Correct answer is All of these
- Question 10 of 24
10.
Water polluted by various human activities causes a number of water borne diseases. Which of the following is not a water borne disease?
Correct
Wrong! Correct answer is Asthma
- Question 11 of 24
11.
Pick from the following one chemical used to disinfect water.
Correct
Wrong! Correct answer is Chlorine
- Question 12 of 24
12.
The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as __________
Correct
Wrong! Correct answer is Sewerage
- Question 13 of 24
13.
Which of the following is a part of inorganic impurities of the sewage?
Correct
Wrong! Correct answer is Phosphates
- Question 14 of 24
14.
In a filtration plant water is filtered using layers of ________
Correct
Wrong! Correct answer is Sand, fine gravel and medium gravel
- Question 15 of 24
15.
Which of the following is not a source of waste water?
Correct
Wrong! Correct answer is Sewers
- Question 16 of 24
16.
The light materials which float during waste water treatment is
Correct
Wrong! Correct Answer is Scum
- Question 17 of 24
17.
Contaminated water disease is
Correct
Wrong! Correct Answer is Gastroenteritis
- Question 18 of 24
18.
Which of the following is a part of waste water treatment plant?
Correct
Wrong! Correct Answer is All of these
- Question 19 of 24
19.
Which of the following is a FALSE statement?
Correct
Wrong! Correct Answer is Cooking oil should be thrown down in the wash basin
- Question 20 of 24
20.
Activate sludge is about ______ water.
Correct
Wrong! Correct Answer is 97%
- Question 21 of 24
21.
Which of the following trees should be grown nearby sewage ponds?
Correct
Wrong! Correct Answer is Eucalyptus trees
- Question 22 of 24
22.
Which of the following is an example of low cost onsite sewage disposal system?
Correct
Wrong! Correct Answer is All of these
- Question 23 of 24
23.
Sewage is a _______ waste which causes which causes water and soil pollution.
Correct
Wrong! Correct Answer is Liquid
- Question 24 of 24
24.
Which microbe is used to decompose sludge into bio gas?
Correct
Wrong! Correct Answer is Anaerobic bacteria
