2. Sewage is mainly a
(a) liquid waste
(b) solid waste
(c) gaseous waste
(d) mixture of solid and gas
3. Which of the following is/are products of wastewater treatment
(a) Biogas
(b) Sludge
(c) Both biogas and sludge
(d) Aerator
4. Open drain system is a breeding place for which of the following.
(a) Flies
(b) Mosquitoes
(c) Organisms which cause diseases (d) All of these
5. Water polluted by various human activities causes a number of water bort
diseases. Which of the following is not a water borne disease?
(a) Cholera
(b) Typhoid
(c) Asthma
(d) Dysentery
6. Pick from the following any one of the chemical used to disinfect water
(a) Chlorine
(b) Washing soda
(c) Silica
(d) Coal
7. The system of a network of pipes used for taking away wastewater fra
homes or public buildings to the treatment plant is known as
(a) sewers
(b) sewerage
(C) transport system
(d) treatment plant
no financanie imunities of the gown
Answers
1) (d) mixture of solid and gas
2) (a) Biogas
3) (b) Mosquitoes
4) (c) Asthma
5) (a) Chlorine
6) (a) sewers
Answer:
2. (a) liquid waste.
Most sewage is liquid waste. It is the waste-water created by human activity from places like homes, businesses, hospitals, and offices that includes both liquid and solid wastes. Water, which contains dissolved and suspended pollutants (contaminants), makes up the majority of it.
3. (c) Both biogas and sludge
By providing the organic material with the oxygen it needs, biogas production reduces water pollution. During the process of treating wastewater, both biogas and sludge are created. An aerator is a mechanical tool that enables air mixing and aeration.
4. (d) All of these
An open drain is a type of canal that collects rainwater and is frequently found in urban areas. In open drain systems, a variety of flies, and mosquitoes grow. The open drainage system also promotes the growth of pathogenic (disease-carrying) organisms.
5. (c) Asthma
Cholera, dysentery, and typhoid are all water-borne diseases, but asthma is an air-borne illness. The cause of asthma in individuals is an allergy to outside allergens like pollen, dust, and other things that are in the air. It results in bronchial constriction and excessive mucus production, which makes breathing difficult.
6. (a) Chlorine
The substance used to disinfect water is chlorine. Prior to being discharged into the distribution system, water from the wastewater treatment facility is disinfected to remove pollutants and germs.
7. (b) sewerage
Sewerage is like a transportation system that moves sewage from its source to its destination (point of disposal), which is a waste-water treatment plant. Sewers are a system of large and small pipes.
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