Wastewater Story [CBSE (Central Board of Secondary Education) Class-7 Science]: Questions 13 - 19 of 23
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Question 13
Question MCQ▾
Some methods to conserve the water are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Mop the floors instead of washing them | |
b. | Avoid wastage of water | |
c. | Adopt rain harvesting technique | |
d. | All a., b. and c. are correct |
Question 14
Question MCQ▾
Organic matter settled down at the base of sedimentation tank is called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Slush | |
b. | Sludge | |
c. | Contaminant | |
d. | Both a. and b. are correct |
Question 15
Question MCQ▾
Scarcity of clean potable water is due to:
Choices
Choice (4) | Response | |
---|---|---|
a. | Industrial development | |
b. | Population growth | |
c. | Pollution | |
d. | All a., b. and c. are correct |
Question 16
Question MCQ▾
Different types of impurities present in water are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Inorganic impurities | |
b. | Organic impurities | |
c. | Nutrients, Bacteria | |
d. | All a., b. and c. are correct |
Question 17
Question MCQ▾
Onsite arrangements for sewage disposal are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Composting pits | |
b. | Chemical toilets | |
c. | Septic tanks | |
d. | All a., b. and c. are correct |
Question 18
Question MCQ▾
Water is polluted from various sources such as from:
Choices
Choice (4) | Response | |
---|---|---|
a. | Mining operations and construction work | |
b. | Houses, Industries | |
c. | Farms | |
d. | All a., b. and c. are correct |
Question 19
Question MCQ▾
Underground network of inter-connected pipes is called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Sewer | |
b. | Sewage | |
c. | Sewerage | |
d. | Question does not provide sufficient data or is vague |