Waste water Story Test

Result

Waste water Story Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is used as a disinfectant

A
Ozone

B
Chlorine

C
Magnesium

D
Both A and B

Solution

Sometimes it may be necessary to disinfect water with chemicals like chlorine and ozone before releasing it into the distribution system.
Thus, Option "D" is correct.
Question 2
1 / -0

Water with impurities is called as

A
Wastewater

B
Potable water

C
Saltwater

D
Clarified water

Solution

Water rich in lather, mixed with oil, black– brown water that goes down the drains from sinks, showers, toilets, laundries with impurities is called wastewater.

Option "A" is correct.
Question 3
1 / -0

Vermi-processing toilet is:

A
Alternative sources of energy

B
Alternative arrangement of sewage disposal

C
Alternative arrangement of sewage treatment

D
None of the above

Solution

Vermi-processing toilet: A design of a toilet in which humans excreta is treated by earthworms. It has been found to be novel, with low usage of water toilets and a safe method for processing human waste. The operation of the toilet is very simple and hygienic. The human excreta is completely converted to vermi cakes that can be used to increase the fertility of the soil.

So, the correct answer is option B.
Question 4
1 / -0

Drains get blocked by :

A
Oil and tea leaves.

B
Oil and chemicals.

C
Chemicals and soil.

D
Chemicals and water.

Solution

Cooking oil and fats should not be thrown down the drain. They can harden and block the pipes. In an open drain, the fats clog the soil pores reducing its effectiveness in filtering water. Throw oil and fats in the dustbin. Chemicals like paints, solvents, insecticides, motor oil, medicines may kill microbes that help purify water. So do not throw them down the drain.
So, the correct answer is 'Oil and chemicals.'
Question 5
1 / -0

Waste water is rich in

A
Microbes

B
Lather

C
Plastics

D
All of the above

Solution

Water rich in lather, mixed with oil, black– brown water that goes down the drains from sinks, showers, toilets, laundries with impurities is called wastewater.

Hence, Option "B" is correct.
Question 6
1 / -0

The liquid waste which has dissolved and suspended impurities is:

A
Sludge

B
Sewage water

C
Potable water

D
None of the above

Solution

Sewage is liquid waste. Most of it is water, which has dissolved and suspended impurities.
Question 7
1 / -0

The buildings which do not have a sewage system can _____________.

A
Construct drainage tanks

B
Construct septic tanks

C
Construct sewage water bodies

D
Construct septic canals

Solution

Septic tanks are underground tanks in which sewage is collected and allowed to decompose with the use of bacteria. Drainage tanks are used to remove water. Sewage pollutes the water bodies when directly discharged into water bodies like river. Septic canal is a tubular passageway for the disposal for sewage.
Thus, the correct answer is option B.
Question 8
1 / -0

Pollution due to sewage can be reduced by

A
Creating separate chemical toilets.

B
Constructing septic tanks.

C
Letting off drainage in rivers.

D
Both A and B.
Solution
A very large fraction of our people defecates in the open, on dry riverbeds, on railway tracks, near fields and many a time directly in water. Untreated human excreta is a health hazard. It may cause water pollution and soil pollution. Both the surface water and groundwater get polluted.
A septic tank is an underground chamber made of concrete, fiberglass or plastic through which domestic wastewater flows for basic treatment. Settling and anaerobic processes reduce solids and organics, but the treatment efficiency is only moderate. Septic tank systems are a type of simple onsite sewage facility.
Chemical toilet is a toilet that is not connected to a sewage system but has a compartment in which waste is treated with chemicals for temporary storage.
Letting off drainage in rivers will cause water pollution.
So, the correct answer is 'Both A and B'
Question 9
1 / -0

The human excreta can be used for the production of ________________.

A
Vermi cakes for fertilizer

B
Vermi cakes as manure

C
Vermi cakes as animal food

D
Both A and B

Solution

Excreta of the humans can be used for making vermicompost using earthworms. Vermi cakes are formed after composting of human excreta. It contains substances like phosphorous, potassium and nitrogen which are major components of fertilizers. Vermi cakes are also used as manure which is an organic matte. It is used as organic fertilizer.
Thus, the correct answer is option D.
Question 10
1 / -0

Wastewater released from home, industries, hospitals is called as

A
Sludge

B
Potable water

C
Freshwater

D
Sewage

Solution

Sewage is wastewater released by homes, industries, hospitals, offices and other users. It also includes rainwater that has run down the street during a storm or heavy rain. The water that washes off roads and rooftops carries harmful substances with it.

Option "D" is correct.

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Re-Attempt Weekly Quiz Competition

Waste water Story Test - 7

Result

Waste water Story Test - 7

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SHARING IS CARING

Question 1

Ozone

Chlorine

Magnesium

Both A and B

Solution

Question 2

Wastewater

Potable water

Saltwater

Clarified water

Solution

Question 3

Alternative sources of energy

Alternative arrangement of sewage disposal

Alternative arrangement of sewage treatment

None of the above

Solution

Question 4

Oil and tea leaves.

Oil and chemicals.

Chemicals and soil.

Chemicals and water.

Solution

Question 5

Microbes

Lather

Plastics

All of the above

Solution

Question 6

Sludge

Sewage water

Potable water

None of the above

Solution

Question 7

Construct drainage tanks

Construct septic tanks

Construct sewage water bodies

Construct septic canals

Solution

Question 8

Creating separate chemical toilets.

Constructing septic tanks.

Letting off drainage in rivers.

Both A and B.

Solution

Question 9

Vermi cakes for fertilizer

Vermi cakes as manure

Vermi cakes as animal food

Both A and B

Solution

Question 10

Sludge

Potable water

Freshwater

Sewage

Solution

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