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Name two alternative arrangements for sewage disposal where there is no sewerage system.

Two alternative arrangements for sewage disposal where there is no sewerage system- The low cost on-site sanitation systems can be adopted like... View Article

Animal waste, oil and urea are some of the organic impurities present in sewage. Name two more organic impurities present in sewage.

There are both organic and inorganic impurities present in the sewage. Organic impurities present in sewage are- (I). Vegetable and fruit peel... View Article

Name two inorganic impurities present in sewage.

Two inorganic impurities present in sewage are nitrates and phosphates. Sewage is the wastewater released by hospitals, homes or industrial... View Article

How are open drains harmful to human health?

An open-drain is mostly used to collect wastewater that is not sewage. Use of open drains to dispose of sanitary waste is extremely unhygienic... View Article

State whether the following statement is True or False. In case a statement is false, write the correct statement.Where underground sewerage systems and refuse disposal systems are not available, the high-cost on-site sanitation system can be adopted.

False The low cost on-site sanitation systems can be adopted when the underground sewerage systems and refuse disposal system are... View Article

State whether the following statement is True or False. In case a statement is false, write the correct statement.Wastewater could be reused.

True Wastewater can be treated using wastewater treatment plant and used for drinking, washing, etc. again. Use the water filtered out by ROs... View Article

State whether the following statement is True or False. In case a statement is false, write the correct statement. Used water is wastewater.

True Water that has been used once is considered as waste water. Water is used for almost every activity. This water gets dirty during... View Article

State whether the following statement is True or False. In case a statement is false, write the correct statement. (a) Sewage is a solid waste which causes water pollution and soil pollution.

False Sewage is actually the wastewater that is released from houses, hospitals, industries, offices and other sources. It also includes the... View Article

Why are open drains a concern?

Mosquitoes fly mostly breed in dirty water or areas and in open water. Open drains are dirty and have wastes in it, which makes it suitable for... View Article

Which of the following is not a source of wastewater? (a) Sewers (b) Homes (c) Industries (d) Hospitals

a) Sewers The pipes through which the wastewater flows into the sewage are known as sewers, whereas, wastewater is collected into the... View Article

In a filtration, plant water is filtered using layers of (a) sand and clay. (b) clay and fine gravel. (c) sand and fine gravel. (d) sand, fine gravel and medium gravel.

(d) sand, fine gravel and medium gravel. The sand, fine gravel and the medium gravels are used to filter as they form a layer so that efficient... View Article

Which of the following is a part of inorganic impurities of the sewage? (a) Pesticides (b) Urea (c) Phosphates (d) Vegetable waste

c) Phosphates Phosphate or phosphorus is an inorganic component and hence, it is considered an inorganic impurity in sewage. Urea, pesticides,... View Article

The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as (a) sewers. (b) sewerage. (c) transport system. (d) treatment plant.

b) Sewerage Sewerage is the system applied in buildings for discharging wastewater to the sewage. It is a network of pipes, known as sewers,... View Article

Pick from the following one chemical used to disinfect water. (a) Chlorine (b) Washing soda (c) Silica (d) Coal

a) Chlorine Chlorine is a very good oxidizer. It kill pathogens and germs by breaking their bonds. This is how it disinfects water. Chlorine... View Article

Water polluted by various human activities causes a number of water-borne diseases. Which of the following is not a waterborne disease? (a) Cholera (b) Typhoid (c) Asthma (d) Dysentry

C) Asthma Asthma is a respiratory disorder in which a patient is allergic to allergens present in air like pollen grains or dust. Cholera,... View Article

An 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

d) All of these Open drain systems are a breeding place for different flies, mosquitoes, and other disease causing organisms. The waste... View Article

Which of the following is/are products of wastewater treatment? (a) Biogas (b) Sludge (c) Both biogas and sludge (d) Aerator

c) Both biogas and sludge Wastewater is collected and passed through bar screens where plastic bags, sticks, cans, napkins, etc. are removed.... View Article

Sewage is mainly a (a) liquid waste. (b) solid waste. (c) gaseous waste. (d) mixture of solid and gas.

a) Liquid waste Sewage is defined as waste water due to which it is a liquid waste. Sewage is actually the wastewater that is released... View Article

Which of the following is wastewater? (a) Water trickling from a damaged tap. (b) Water coming out of a shower. (c) Water flowing in a river. (d) Water coming out of laundry.

(d) Water coming out of a laundry. Water discharged during after routine works like washing clothes, flushing toilet, cleaning utensils makes... View Article

The picture in Figure shows tree line along the sea coast on an island near the equator. As shown, the tree tops are permanently bent in one direction. Are the trees bent towards the sea or away from it? Explain.

In the coastal regions of an island near the equator, heating and cooling of air are a regular phenomenon. During the daytime, the land gets... View Article

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