Bacteria in Sewage

Q.

Rings wells were used for:

1. Bathing

2. Washing clothes

3. Irrigation

4. Drainage

Q.

Write a short note on the liquid waste from domestic activities.

Q.

During wastewater treatment, air is pumped into the water to promote growth of

1. Aerobic bacteria

2. Anaerobic bacteria

3. Fungi

4. Viruses

Q. Disposal of sewage in large cities, is done in

1. Dilution
2. Oxidation
3. Putrifaction
4. Irrigation

Q.

Metals, phosphates and nitrates are inorganic impurities in wastewater.

1. True
2. False

Q. Animal wastes are impurities while metals are impurities present in the sewage.

1. organic
2. inorganic
3. acidic
4. basic

Q.

Which of the following chemicals is used to disinfect water?

1. Chlorine

2. Washing soda

3. Silica

4. Coal

Q.

In the wastewater treatment plant (WWTP), air is pumped into the water to:

1. Support the growth of anaerobic bacteria

2. Support the growth of aerobic bacteria

3. Disinfect water

4. Blow human waste

Q.

21. Are the following statements true or false?

e. Sewage should be treated for the removal of harmful wastes before it is released into the river.

1. True
2. False

Q. Select the incorrect statement from the following.
निम्नलिखित में से गलत कथन का चयन कीजिए।

1. Biogas in anaerobic sludge digester is formed due to the activity of bacteria and fungi that form sludge
   अवायवीय आपंक संपाचित्र में आपंक बनाने वाले जीवाणुओं तथा कवक की सक्रियता के कारण बायोगैस बनती है
2. Flocs are formed in primary effluent of sewage in aeration tanks
   ऊर्णकों का निर्माण वातन टैंकों में वाहितमल के प्राथमिक बहिस्राव में होता है
3. The Ministry of Environment and Forests has initiated Ganga Action Plan
   पर्यावरण तथा वन मंत्रालय ने गंगा ऐक्शन प्लान जैसी योजना का सूत्रपात किया है
4. The effluent from the secondary treatment plant of sewage water is generally released into natural water bodies
   वाहितमल जल के द्वितीयक उपचार संयंत्र से निकलने वाले बहिस्राव को सामान्यतः प्राकृतिक जल निकायों में छोड़ दिया जाता है

Q.

Sewage is mainly a ___.

1. liquid waste

2. mixture of solid and gas

3. solid waste

4. gaseous waste

Q. What is added to the water treatment tank to settle the colloidal particles?

1. Alum
2. Alum and lime
3. Lime
4. Potash

Q.

Name a pathogenic bacterium.

Q. In a filtration plant, water is filtered using layers of

1. sand and clay
2. clay and fine gravel
3. sand and fine gravel
4. sand, fine gravel and medium gravel

Q.

Presence of _______ in water bodies causes excessive growth of algae in water.

1. methane

2. DDT

3. CNT

4. coal

Q. What is the process for waste water treatment called?

1. Water treatment
2. Sewage treatment
3. Filtration
4. Chlorination

Q.

Which of the following diseases are caused by free-living microbes?

1. nitrogen

2. carbon

3. oxygen

4. oxygen and nitrogen

Q.

Sewage contains which of the following wastes/ impurities?

1. Dissolved wastes

2. Non-biodegradable wastes

3. Suspended impurities

4. None of these

Q. Which of the following is a part of inorganic impurities in the sewage?

1. Pesticides
2. Urea
3. Phosphates
4. Vegetable waste

Q.

Eutrophication causes decrease in ______________.

1. dissolved nitrides

2. dissolved salts

3. dissolved hydrogen

4. dissolved oxygen

Q.

The term 'sullage' refers to the ___.

1. Septic wastewater.

2. Industrial wastewater.

3. Wastewater from kitchen, laundry.

4. Toxic wastewater.