Questions
Which of the following is a waste from the nutrients?
- Animal waste
- Human stool
- Pesticides
- Nitrogen
- Herbicides
Which of the following statements is/are false?
a. Micro-organisms decompose the inorganic matter present in the sewage.
b. Discharge of untreated sewage into water bodies is a main source of water pollution and many diseases.
c. During the process of decomposition, the micro-organisms use up the sewage water's oxygen and release poisonous substances like ammonia.
- Only a
- Only a and b
- Only b
- Only b and c
- Only c
Which of the following is/are not the reason responsible for the scarcity of fresh water?
- Overpopulation
- Increased industrial development
- Construction activities
- Pollution
- Excessive rainfall
Which of the following diseases is not water related?
- Typhoid
- Cholera
- Malaria
- Dysentery
- Diarrhoea
Which day is celebrated as World Water Day?
- March 15
- March 22
- April 18
- April 7
- March 23
Which of the following is not a step involved in the primary treatment stage of the sewage?
a. Passage of liquid through sedimentation tanks.
b. Treatment of liquid with chlorine to kill disease causing organisms.
c. Passage of liquid through a tank to remove dirt and sand.
- Only a
- Only a and b
- Only b
- Only b and c
- Only c
Which of the following is an inorganic waste?
- Phosphates
- Fruits waste
- Vegetables waste
- Nitrogen
- Bacteria
Which of the following is not an organic waste?
- Human faeces
- Nitrates
- Animal waste
- Eggshells
- Paper
Sewage is the waste matter that passes through sewers. Which of the following is not a component of the sewage?
- Industrial waste
- Human stool
- Medical waste from hospitals
- Urine
- Rainwater that runs down during heavy rains
Which of the following statements is/are false?
a. Treating the sludge with anaerobic bacteria is a step in the secondary treatment of sewage.
b. The biogas that is produced at the end of the second stage in the treatment of sewage is methane.
c. During the third stage of treatment of sewage, disinfection of water is done by using calcium.
- Only a
- Only a and b
- Only b
- Only c
Which of the following is the full form of WWTP?
- World Waste Treatment Plant
- Waste Water Treatment Plant
- World Workers Talent Programme
- Water World Treatment Plant
- World Wide Transport Programme
Which of the following trees should be planted along sewage ponds as they absorb all surplus wastewater rapidly and release pure water vapour into the atmosphere?
- Bamboo
- Neem
- Eucalyptus
- Sheesham
- Semal
Which of the following will not help in avoiding water pollution and maintaining sanitation?
- Providing proper toilet facilities.
- Proper treatment of chemical waste from factories.
- Ensuring no leakage in sewage pipes.
- Proper disposal of waste.
- Discharging sewage directly into rivers.
Match the following:
| 1. Septic tank | a. a place where a liquid is held to increase the amount of air in it. |
| 2. Sedimentation tank | b. an underground tank, in which sewage is collected and allowed to decompose through bacterial activity before draining by means of a soakaway. |
| 3. Aeration tank | c. a place into which sewage is passed to allow suspended solid matter to separate out. |
- 1 - b, 2 - a, 3 - c
- 1 - b, 2 - c, 3 - a
- 1 - a, 2 - c, 3 - b
- 1 - a, 2 - b, 3 - c
- 1 - c, 2 - b, 3 - a
Match the following:
| 1. Contaminants | a. Solid matter that settles at the bottom in the sedimentation tank. |
| 2. Sludge | b. Gaseous fuel produced by the fermentation of organic matter. |
| 3. Biogas | c. Dissolved and suspended impurities in sewage. |
- 1 - c, 2 - a, 3 - b
- 1 - c, 2 - b, 3 - a
- 1 - a, 2 - c, 3 - b
- 1 - a, 2 - b, 3 - c
- 1 - b, 2 - a, 3 - c