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

Question 1

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

A)Water
B)Nitrogen
C)Carbondioxide
D)Oxygen

Answer 1

Oxygen

Question 2

Determination of flow increase is used for the monitoring of ___________

A)sea pollution
B)River pollution
C)Lake pollution
D)Tank pollution

Answer 2

River pollution

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

Answer 3

Colour of the water

Question 4

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

A)BOD
B)COD
C)DO
D)ThOD

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

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

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

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

Question 9

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

A)Increases
B)Depletes
C)Maintains
D)Improves

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

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

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

Question 13

Which of the following is a strict anaerobe?

A)Enterobacter
B)Alcaligenes
C)Pseudomonas
D)Methanosarcina

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

Question 15

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

A)fungi
B)protozoa
C)algae
D)bacteria

Question 16

Activated sludge usually employs an aeration period of ________________

A)1 hour
B)24 hours
C)10-15 hours
D)4-8 hours

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

Question 18

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

A)Thickening
B)Stabilization
C)Dewatering
D)Disposal

Question 19

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

A)methane
B)carbon-dioxide
C)hydrogen
D)nitrogen

Question 20

Biological process is used to remove _______

A)Settleable solids
B)Volatile solids
C)Dissolved solids
D)Colloids

Question 21

What is the wastewater called as after physical and biological removal of solids?

A)Primary effluent
B)Primary treated water
C)Secondary treated water
D)Secondary treated wastewater

Question 22

What is the monthly concentration of solids produced by secondary sewage effluent?

A)20 mg/l
B)30 mg/l
C)40 mg/l
D)35 mg/l

Question 23

What is the expected BOD removal after both primary and secondary treatment?

A)90%
B)85%
C)80%
D)75%

Question 24

What is the percentage removal of BOD by stabilization ponds?

A)20%
B)45%
C)65%
D)95%

Question 25

Which of these is not an advantage of a trickling filter?

A)Temperature
B)Construction cost
C)Oxygen delivery
D)Electric systems