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Microbiology of Waste Water MCQ Questions & Answers

Microbiology of Waste Water MCQs : This section focuses on the "Microbiology of Waste Water". These Multiple Choice Questions (MCQs) should be practiced to improve the Microbiology of Waste Water skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

Biomass

A. provides the U.S. with about 50% of its energy
B. consists largely of wood, animal, and human waste
C. is unlikely to be a major source of energy globally
D. offers the consumer high quality energy with low environmental impact

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Question 2

Which is not a form of biomass energy?

A. Incineration of solid waste
B. Composting to produce methane
C. Ethanol and methanol production for auto fuel
D. Photovoltaic production of hydrogen

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Question 3

The death of a river by environmental pollutants ultimately results from

A. the overpopulation of algae
B. the overabundance of toxic proteins
C. the depletion of oxygen
D. the buildup of sediment on the river bottom

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Question 4

What is an anaerobic digester?

A. New diet drink
B. Microbe that eats hazardous waste
C. Method to convert agricultural waste into a biogas
D. All of the above

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Question 5

Water testing relies on the detection of certain indicator organisms known as

A. acid-fast bacteria
B. bacteroids
C. coliforms
D. dinoflagellates

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Question 6

The acetate-utilizing methanogens are responsible for

A. 20% of methane produced in a biogas reactor
B. 50% of methane produced in a biogas reactor
C. 70% of methane produced in a biogas reactor
D. 85% of methane produced in a biogas reactor

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Question 7

Which of the following statement is not correct?

A. The use of 25-40°C temperatures allows the biogas production to be more stable
B. The use of 25-40°C temperatures does not destroy potentially harmful bacteria
C. The use of 25-40°C temperatures destroys potentially harmful bacteria
D. None of these

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Question 8

Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate

A. water rich in organic carbon wastes but poor in phosphate
B. water that are anoxic
C. water rich in phosphate wastes but poor in organic carbon
D. none of the above

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Question 9

Which of the following is generally not referred to the sewerage system?

A. Sanitary sewers
B. Storm sewers
C. Combined sewers
D. Solid sewers

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Question 10

Which of the following statement is not correct?

A. The use of 25-40°C temperatures allows the biogas production to be more stable
B. The use of 25-40°C temperatures does not destroy potentially harmful bacteria
C. The use of 25-40°C temperatures destroys potentially harmful bacteria
D. None of the above

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Question 11

Which of the following is responsible for the corrosion problem?

A. Iron bacteria
B. Sulfur bacteria
C. Slime forming bacteria
D. All of these

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Question 12

Oxidation ponds are shallow ponds, generally designed at the depth of

A. 2 to 40 feet
B. 4 to 6 feet
C. 1 to 3 feet
D. 5 to 8 feet

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Question 13

Iron bacteria can produce

A. slime
B. undesirable odors and tastes
C. both (a) and (b)
D. extreme acidity

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Question 14

The filtering medium of trickling filters is coated with microbial flora, known as

A. zoological film
B. geological film
C. zooglocal film
D. None of these

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Question 15

Which of the following is responsible for the corrosion problem?

A. Iron bacteria
B. Sulfur bacteria
C. Slime forming bacteria
D. All of the above

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Question 16

Which of the following is not employed as an oxidation method?

A. Oxidation ponds
B. Trickling filters
C. Contact aerators
D. All of the above

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Question 17

The biogas production process takes place at the temperature

A. lesser than 25°C
B. 25-40°C
C. 45-60°C
D. all of these

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Question 18

The use of microbes to break down synthetic waste products such as polychlorinated biphenyls is called

A. bioinformatics
B. biolistics
C. biotechnology
D. bioremediation

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Question 19

Treatment of municipal water supplies is based upon

A. coagulation, filtration, chlorination
B. chlorination, filtration, coagulation
C. filtration, coagulation, chlorination
D. coagulation, chlorination, filtration

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Question 20

Composting is one of the oldest forms of disposal of waste. It is the natural process of decomposition of organic waste that yields manure or compost. One of the following is added to the compost to get better results?

A. Ants
B. Bugs
C. Snakes
D. Worms

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Question 21

Advanced treatment is generally used to treat waste water to

A. remove coarse solids
B. remove settleable solids
C. reduce BOD
D. remove additional objectionable substances

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Question 22

Which of the following is not employed as an oxidation method?

A. Oxidation ponds
B. Trickling filters
C. Contact aerators
D. All of these

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Question 23

Biogas production is

A. a temperature-dependent process
B. a temperature independent process
C. an oxygen dependent process
D. none of the above

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Question 24

Activated sludge contains large number of

A. bacteria
B. yeasts and molds
C. protozoa
D. All of the above

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Question 25

The concept of putting microbes to help clean up the environment is called

A. pasteurization
B. bioremediation
C. fermentation
D. biolistics

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Question 26

Biogas production is

A. a temperature-dependent process
B. a temperature independent process
C. an oxygen dependent process
D. None of these

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Question 27

Iron bacteria can produce

A. slime
B. undesirable odors and tastes
C. Both A and B
D. extreme acidity

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Question 28

The magnitude of BOD of wastewater is related to

A. bacterial count
B. amount of organic material
C. amount of inorganic material
D. All of the above

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Question 29

The biogas production process takes place at the temperature

A. lesser than 25°C
B. 25-40°C
C. 45-60°C
D. All of the above

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Question 30

A dense bacterial population caught in a tangled web of fibers sticking to a surface describes

A. coagulation
B. a biodisc
C. a biofilm
D. the membrane filter technique

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Question 31

Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate

A. water rich in organic carbon wastes but poor in phosphate
B. water that are anoxic
C. water rich in phosphate wastes but poor in organic carbon
D. None of these

View Answer

Question 32

Activated sludge contains large number of

A. bacteria
B. yeasts and molds
C. protozoa
D. all of these

View Answer