25 Wastewater Treatment MCQs for RSPCB JSO/JEE | Turbidity, BOD, COD, pH, Alkalinity & More -

Test your depth of understanding with these high-level multiple-choice questions covering the complete wastewater and water quality syllabus. Each question is designed to challenge your conceptual clarity and application skills for exams like RSPCB JSO and JEE (Environmental). Answers and reasoning are provided immediately.

Quiz: Physical Chemical and Biological Characteristics of Water

25 Qs Time: 15 Minut

1 / 25

1. The optimum pH range for biological wastewater treatment is:

1. 8.5 – 10.5

2. 5.5 – 9.5

3. 4.5 – 6.5

4. 6.5 – 8.5

2 / 25

2. BOD measures:
A. Total organic matter
B. Biodegradable organic matter
C. Non-biodegradable organics
D. Inorganic solids

1. A B and C

2. B only

3. A only

4. B and C

3 / 25

3. Which statement is always true?

1. COD > BOD

2. COD < DO

3. COD = BOD

4. BOD > COD

4 / 25

4. Approximate estimation of TDS is commonly done using:

1. EDTA titration

2. Electrical conductivity

3. Imhoff cone

4. Turbidity

5 / 25

5. Suspended solids are best defined as solids which:

1. Are soluble in water

2. Are retained by filtration

3. Settle only after coagulation

4. Pass through 1 µm filter

6 / 25

6. Nitrites are measured using colour development with:

1. Sulphanilic acid and naphthamine

2. KMnO₄

3. Phenol-disulphonic acid

4. EDTA

7 / 25

7. High pH in wastewater mainly causes:

1. Corrosion

2. Increased BOD

3. Scaling

4. Increased turbidity

8 / 25

8. Settleable solids in sewage are measured using:

1. Conductivity meter

2. Imhoff cone

3. EDTA titration

4. Nephelometer

9 / 25

9. High chloride concentration in sewage indicates:

1. Domestic sewage

2. Biological oxidation

3. Fresh sewage

4. Seawater intrusion

10 / 25

10. The most accurate instrument for measuring low turbidity in drinking water is:

1. Turbidity rod

2. Baylis turbidimeter

3. Nephelometer

4. Jackson’s turbidimeter

11 / 25

11. Chlorides in wastewater are determined using:

1. Argentometric titration

2. EDTA titration

3. Conductivity method

4. Winkler method

12 / 25

12. Carbonate hardness of water is equal to:

1. Non-carbonate hardness

2. Lesser of total hardness and alkalinity

3. Total hardness

4. Alkalinity

13 / 25

13. Municipal sewage is considered highly polluting mainly because:

1. It contains pathogens and biodegradable organic matter

2. It contains high TDS only

3. It contains toxic metals

4. It is acidic in nature

14 / 25

14. Wastewater with BOD5/COD ratio = 0.65 is considered: जिस अपशिष्ट जल का BOD5/COD = 0.65 हो, वह माना जाता है:

1. Moderately biodegradable

2. Partially biodegradable

3. Highly biodegradable

4. Untreatable

15 / 25

15. The major objection of turbidity in water treatment is that it:

1. Increases alkalinity

2. Reduce Disinfectants efficiency

3. Reduces hardness

4. Increases pH

16 / 25

16. Nephelometer measures turbidity based on light scattered at:
नेफेलोमीटर किस कोण पर बिखरे प्रकाश को मापता है?

1. 45°

2. 180°

3. 90°

4. 0°

17 / 25

17. Presence of nitrites in sewage indicates:

1. Fully treated sewage

2. No organic matter

3. Incomplete oxidation

4. Fresh sewage

18 / 25

18. Particles larger than 10 μm are classified as:
10 माइक्रोन से बड़े कण कहलाते हैं:

1. Colloidal solids

2. Volatile solids

3. Settleable solids

4. Dissolved solids

19 / 25

19. pH 8.3 in alkalinity titration corresponds to neutralization of:
क्षारीयता टाइट्रेशन में pH 8.3 किसके न्यूट्रलाइज़ेशन को दर्शाता है?

1. Total alkalinity

2. OH⁻ and half CO₃²⁻

3. Only carbonate

4. Only bicarbonate

20 / 25

20. Minimum DO required in a river after sewage discharge to protect aquatic life is:
A. 1 mg/L
B. 2 mg/L
C. 4 mg/L
D. 6 mg/L

1. A

2. D

3. B

4. C

21 / 25

21. Standard oxidizing agent used in COD test is: COD परीक्षण में प्रयुक्त मानक ऑक्सीडाइज़र है:

1. KMnO₄

2. Chlorine

3. Ozone

4. K₂Cr₂O₇

22 / 25

22. Kjeldahl nitrogen represents:
A. Only ammonia nitrogen
B. Only nitrate nitrogen
C. Total nitrogen

1. A and B

2. A B and C

3. B and C

4. A and C

23 / 25

23. If COD is very high but BOD is very low, wastewater is:
यदि COD अधिक और BOD बहुत कम है, तो अपशिष्ट जल है:

1. Highly biodegradable

2. Fully treated

3. Non-biodegradable

4. Fresh sewage

24 / 25

24. Alkalinity of water is expressed in terms of:

1. mg/L as HCO₃⁻

2. mg/L as CO₃⁻

3. meq/L as OH⁻

4. mg/L as CaCO₃

25 / 25

25. Which of the following is NOT a physical characteristic of wastewater?

1. BOD

2. Temperature

3. Colour

4. Turbidity

Your score is

The average score is 37%

Join Our Test Series: https://classplusapp.com/w/kpmrra/courses/766909?utm_source%3Dother%26utm_medium%3Dtutor-course-referral%26utm_campaign%3Dcourse-overview-webapp

Quiz: Physical Chemical and Biological Characteristics of Water

25 Qs Time: 15 Minut

1 / 25

1. Nitrites are measured using colour development with:

1. Phenol-disulphonic acid

2. KMnO₄

3. EDTA

4. Sulphanilic acid and naphthamine

2 / 25

2. Municipal sewage is considered highly polluting mainly because:

1. It contains high TDS only

2. It contains pathogens and biodegradable organic matter

3. It contains toxic metals

4. It is acidic in nature

3 / 25

3. Approximate estimation of TDS is commonly done using:

1. Imhoff cone

2. EDTA titration

3. Electrical conductivity

4. Turbidity

4 / 25

4. The major objection of turbidity in water treatment is that it:

1. Increases pH

2. Reduce Disinfectants efficiency

3. Reduces hardness

4. Increases alkalinity

5 / 25

5. Alkalinity of water is expressed in terms of:

1. meq/L as OH⁻

2. mg/L as HCO₃⁻

3. mg/L as CaCO₃

4. mg/L as CO₃⁻

6 / 25

6. Which of the following is NOT a physical characteristic of wastewater?

1. Colour

2. BOD

3. Turbidity

4. Temperature

7 / 25

7. Carbonate hardness of water is equal to:

1. Non-carbonate hardness

2. Lesser of total hardness and alkalinity

3. Alkalinity

4. Total hardness

8 / 25

8. Settleable solids in sewage are measured using:

1. Nephelometer

2. EDTA titration

3. Imhoff cone

4. Conductivity meter

9 / 25

9. High pH in wastewater mainly causes:

1. Increased turbidity

2. Corrosion

3. Increased BOD

4. Scaling

10 / 25

10. BOD measures:
A. Total organic matter
B. Biodegradable organic matter
C. Non-biodegradable organics
D. Inorganic solids

1. A B and C

2. B and C

3. B only

4. A only

11 / 25

11. pH 8.3 in alkalinity titration corresponds to neutralization of:
क्षारीयता टाइट्रेशन में pH 8.3 किसके न्यूट्रलाइज़ेशन को दर्शाता है?

1. Only carbonate

2. OH⁻ and half CO₃²⁻

3. Total alkalinity

4. Only bicarbonate

12 / 25

12. Which statement is always true?

1. COD = BOD

2. COD < DO

3. BOD > COD

4. COD > BOD

13 / 25

13. Particles larger than 10 μm are classified as:
10 माइक्रोन से बड़े कण कहलाते हैं:

1. Colloidal solids

2. Settleable solids

3. Dissolved solids

4. Volatile solids

14 / 25

14. Presence of nitrites in sewage indicates:

1. Fresh sewage

2. Fully treated sewage

3. Incomplete oxidation

4. No organic matter

15 / 25

15. The most accurate instrument for measuring low turbidity in drinking water is:

1. Jackson’s turbidimeter

2. Turbidity rod

3. Nephelometer

4. Baylis turbidimeter

16 / 25

16. The optimum pH range for biological wastewater treatment is:

1. 5.5 – 9.5

2. 6.5 – 8.5

3. 8.5 – 10.5

4. 4.5 – 6.5

17 / 25

17. Suspended solids are best defined as solids which:

1. Are retained by filtration

2. Pass through 1 µm filter

3. Settle only after coagulation

4. Are soluble in water

18 / 25

18. Kjeldahl nitrogen represents:
A. Only ammonia nitrogen
B. Only nitrate nitrogen
C. Total nitrogen

1. B and C

2. A and C

3. A B and C

4. A and B

19 / 25

19. Nephelometer measures turbidity based on light scattered at:
नेफेलोमीटर किस कोण पर बिखरे प्रकाश को मापता है?

1. 45°

2. 0°

3. 90°

4. 180°

20 / 25

20. Chlorides in wastewater are determined using:

1. Argentometric titration

2. Conductivity method

3. Winkler method

4. EDTA titration

21 / 25

21. If COD is very high but BOD is very low, wastewater is:
यदि COD अधिक और BOD बहुत कम है, तो अपशिष्ट जल है:

1. Highly biodegradable

2. Fully treated

3. Non-biodegradable

4. Fresh sewage

22 / 25

22. Standard oxidizing agent used in COD test is: COD परीक्षण में प्रयुक्त मानक ऑक्सीडाइज़र है:

1. K₂Cr₂O₇

2. Ozone

3. Chlorine

4. KMnO₄

23 / 25

23. Wastewater with BOD5/COD ratio = 0.65 is considered: जिस अपशिष्ट जल का BOD5/COD = 0.65 हो, वह माना जाता है:

1. Highly biodegradable

2. Partially biodegradable

3. Untreatable

4. Moderately biodegradable

24 / 25

24. Minimum DO required in a river after sewage discharge to protect aquatic life is:
A. 1 mg/L
B. 2 mg/L
C. 4 mg/L
D. 6 mg/L

1. B

2. D

3. C

4. A

25 / 25

25. High chloride concentration in sewage indicates:

1. Domestic sewage

2. Biological oxidation

3. Fresh sewage

4. Seawater intrusion

Your score is

The average score is 37%

Author

kanwar

Kanwar Bhan Godara UGC NET JRF Environmental Science
View all posts

25 Wastewater Treatment MCQs for RSPCB JSO/JEE | Turbidity, BOD, COD, pH, Alkalinity & More

Author

Comments

Leave a Reply Cancel reply