Question 1

Control of river pollution can be done by providing the extra ___________ during dry season.
A)Water
B)Nitrogen
C)Carbondioxide
D)Oxygen

Accepted Answer

Providing extra oxygen during the dry season can help control river pollution by supporting aerobic decomposition of pollutants and maintaining aquatic life.

Question 2

Determination of flow increase is used for the monitoring of ___________
A)sea pollution
B)River pollution
C)Lake pollution
D)Tank pollution

Accepted Answer

Determination of flow increase is used for monitoring river pollution because it helps in understanding the changes in water quality and quantity that can indicate pollution levels.

Question 3

which of the following does not include in the monitoring of river pollution?
A)Assessing the immediate water quality
B)Development activities in the region
C)Determination of flow increase
D)Colour of the water

Accepted Answer

D

Question 4

Which one of the following is the basic indicator of river health?
A)BOD
B)COD
C)DO
D)ThOD

Accepted Answer

Dissolved Oxygen (DO) is the basic indicator of river health because it is essential for the survival of fish and other aquatic organisms. A healthy level of DO in water bodies indicates good water quality and a balanced aquatic ecosystem.

Question 5

What is the minimum amount of DO required for the life survival of aquatic animals?
A)10 mg/l
B)5 mg/l
C)2 mg/l
D)1 mg/l

Accepted Answer

The answer of What is the minimum amount of DO...

Question 6

In the concept of self purification of natural streams, complete the following phrase. Solution to pollution is _________
A)Control
B)Dilution
C)Reuse
D)Recycle

Accepted Answer

Dilution is a key concept in the self-purification of natural streams, where pollutants are diluted to lower concentrations through the mixing with larger volumes of clean water, reducing their harmful effects.

Question 7

_________ is accomplished by the replenishment of oxygen lost to bacterial degradation of organic waste.
A)Gas transfer
B)Dilution
C)Filtration
D)Re-suspension

Accepted Answer

Gas transfer is the process through which oxygen is replenished in water bodies, compensating for the oxygen consumed by bacteria during the degradation of organic waste. This is essential for maintaining aquatic life and water quality.

Question 8

On which of the following does the self purification process does not depend?
A)Volume
B)Flow rate
C)Temperature
D)Aquatic species

Accepted Answer

The self-purification process of water bodies primarily depends on physical, chemical, and biological factors such as volume, flow rate, and temperature, which influence the degradation of pollutants. Aquatic species, while part of the ecosystem, are not a direct factor in the self-purification process but rather are affected by it.

Question 9

In a flowing stream, the breakdown of degradable wastes by bacteria ________ dissolved oxygen.
A)Increases
B)Depletes
C)Maintains
D)Improves

Accepted Answer

The breakdown of degradable wastes by bacteria in a flowing stream depletes dissolved oxygen because the bacteria use oxygen in the water to decompose the waste materials.

Question 10

What is the objective of water quality management?
A)Control the discharge of pollutants
B)Pollutants are discharged into flowing streams
C)Selective pollutants are released
D)Only highly toxic pollutants are released

Accepted Answer

The objective of water quality management is to control the discharge of pollutants into water bodies to prevent water pollution and protect aquatic ecosystems and human health.

Question 11

The impact of pollution depends upon nature of the pollutants and the ___________
A)Toxic contaminants
B)Season
C)Contaminants
D)Characteristics of river

Accepted Answer

The impact of pollution is influenced by the characteristics of the river, such as its flow rate, volume, and ability to dilute or disperse pollutants.

Question 12

Which of the following sewerage systems carry domestic and industrial wastewater?
A)sanitary sewers
B)storm sewers
C)combined sewers
D)storm and combined sewers

Accepted Answer

The answer of Which of the following sewerage systems carry...

Question 13

Which of the following is a strict anaerobe?
A)Enterobacter
B)Alcaligenes
C)Pseudomonas
D)Methanosarcina

Accepted Answer

Methanosarcina is a strict anaerobe, meaning it can only grow in environments that lack oxygen. This contrasts with the other options, which are either facultative anaerobes or aerobes, capable of growing in the presence of oxygen.

Question 14

In which of the following treatment involve oxidation of organic constituents of the wastewater?
A)Primary treatment
B)Secondary treatment
C)Advanced treatment
D)Final treatment

Accepted Answer

Secondary treatment involves biological processes that oxidize organic constituents of the wastewater.

Question 15

The upper region of the trickling filter is favorable for the growth of _____________
A)fungi
B)protozoa
C)algae
D)bacteria

Accepted Answer

The upper region of the trickling filter is exposed to light, making it favorable for the growth of algae, which require light for photosynthesis.

Question 16

Activated sludge usually employs an aeration period of ________________
A)1 hour
B)24 hours
C)10-15 hours
D)4-8 hours

Accepted Answer

The answer of Activated sludge usually employs an aeration period...

Question 17

Trickling filter is used in which of the following wastewater treatment processes?
A)Primary treatment
B)Secondary treatment
C)Advanced treatment
D)Final treatment

Accepted Answer

Trickling filters are used in the secondary treatment of wastewater. They help in the biological treatment by allowing microorganisms to consume the organic matter in the wastewater.

Question 18

Belt filter presses are used in which of the following process?
A)Thickening
B)Stabilization
C)Dewatering
D)Disposal

Accepted Answer

Belt filter presses are primarily used for dewatering processes, where they separate liquids from solids in sludge or slurry.

Question 19

Which of the following gases are produced in large amounts during sludge digestion?
A)methane
B)carbon-dioxide
C)hydrogen
D)nitrogen

Accepted Answer

The answer of Which of the following gases are produced...

Question 20

Biological process is used to remove _______
A)Settleable solids
B)Volatile solids
C)Dissolved solids
D)Colloids

Accepted Answer

Biological processes are primarily used to remove dissolved solids from wastewater through the action of microorganisms.

Quiz 3: Pollutants From Wastewater: A Study on River Pollution Control and Wastewater Treatment

Control of river pollution can be done by providing the extra ___________ during dry season.

Determination of flow increase is used for the monitoring of ___________

which of the following does not include in the monitoring of river pollution?

Which one of the following is the basic indicator of river health?

What is the minimum amount of DO required for the life survival of aquatic animals?

In the concept of self purification of natural streams, complete the following phrase. Solution to pollution is _________

_________ is accomplished by the replenishment of oxygen lost to bacterial degradation of organic waste.

On which of the following does the self purification process does not depend?

In a flowing stream, the breakdown of degradable wastes by bacteria ________ dissolved oxygen.

What is the objective of water quality management?

The impact of pollution depends upon nature of the pollutants and the ___________

Which of the following sewerage systems carry domestic and industrial wastewater?

Which of the following is a strict anaerobe?

In which of the following treatment involve oxidation of organic constituents of the wastewater?

The upper region of the trickling filter is favorable for the growth of _____________

Activated sludge usually employs an aeration period of ________________

Trickling filter is used in which of the following wastewater treatment processes?

Belt filter presses are used in which of the following process?

Which of the following gases are produced in large amounts during sludge digestion?

Biological process is used to remove _______