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. 4.5 – 6.5

2. 5.5 – 9.5

3. 6.5 – 8.5

4. 8.5 – 10.5

2 / 25

2. 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. Only carbonate

3. Only bicarbonate

4. OH⁻ and half CO₃²⁻

3 / 25

3. Alkalinity of water is expressed in terms of:

1. mg/L as CaCO₃

2. meq/L as OH⁻

3. mg/L as CO₃⁻

4. mg/L as HCO₃⁻

4 / 25

4. Carbonate hardness of water is equal to:

1. Alkalinity

2. Lesser of total hardness and alkalinity

3. Total hardness

4. Non-carbonate hardness

5 / 25

5. Which statement is always true?

1. BOD > COD

2. COD > BOD

3. COD < DO

4. COD = BOD

6 / 25

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

1. K₂Cr₂O₇

2. KMnO₄

3. Chlorine

4. Ozone

7 / 25

7. High pH in wastewater mainly causes:

1. Scaling

2. Increased BOD

3. Increased turbidity

4. Corrosion

8 / 25

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

1. Baylis turbidimeter

2. Nephelometer

3. Jackson’s turbidimeter

4. Turbidity rod

9 / 25

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

1. Colour

2. Temperature

3. BOD

4. Turbidity

10 / 25

10. Approximate estimation of TDS is commonly done using:

1. Electrical conductivity

2. Imhoff cone

3. EDTA titration

4. Turbidity

11 / 25

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

1. 90°

2. 45°

3. 180°

4. 0°

12 / 25

12. Presence of nitrites in sewage indicates:

1. Fresh sewage

2. Incomplete oxidation

3. No organic matter

4. Fully treated sewage

13 / 25

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

1. A and B

2. A and C

3. A B and C

4. B and C

14 / 25

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

1. B and C

2. B only

3. A B and C

4. A only

15 / 25

15. Chlorides in wastewater are determined using:

1. Winkler method

2. Argentometric titration

3. EDTA titration

4. Conductivity method

16 / 25

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

1. Increases alkalinity

2. Reduce Disinfectants efficiency

3. Increases pH

4. Reduces hardness

17 / 25

17. Nitrites are measured using colour development with:

1. KMnO₄

2. Phenol-disulphonic acid

3. EDTA

4. Sulphanilic acid and naphthamine

18 / 25

18. 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

19 / 25

19. High chloride concentration in sewage indicates:

1. Seawater intrusion

2. Domestic sewage

3. Biological oxidation

4. Fresh sewage

20 / 25

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

1. Volatile solids

2. Colloidal solids

3. Settleable solids

4. Dissolved solids

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. Fresh sewage

2. Fully treated

3. Non-biodegradable

4. Highly biodegradable

22 / 25

22. Suspended solids are best defined as solids which:

1. Are soluble in water

2. Settle only after coagulation

3. Pass through 1 µm filter

4. Are retained by filtration

23 / 25

23. Settleable solids in sewage are measured using:

1. Imhoff cone

2. Conductivity meter

3. EDTA titration

4. Nephelometer

24 / 25

24. 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. Untreatable

4. Highly biodegradable

25 / 25

25. 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. D

2. A

3. B

4. C

Your score is

The average score is 40%

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

1. Reduces hardness

2. Increases pH

3. Reduce Disinfectants efficiency

4. Increases alkalinity

2 / 25

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

1. Dissolved solids

2. Colloidal solids

3. Settleable solids

4. Volatile solids

3 / 25

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

1. 0°

2. 90°

3. 180°

4. 45°

4 / 25

4. Presence of nitrites in sewage indicates:

1. Fresh sewage

2. No organic matter

3. Incomplete oxidation

4. Fully treated sewage

5 / 25

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

1. 6.5 – 8.5

2. 8.5 – 10.5

3. 4.5 – 6.5

4. 5.5 – 9.5

6 / 25

6. High chloride concentration in sewage indicates:

1. Domestic sewage

2. Biological oxidation

3. Fresh sewage

4. Seawater intrusion

7 / 25

7. Alkalinity of water is expressed in terms of:

1. meq/L as OH⁻

2. mg/L as CO₃⁻

3. mg/L as CaCO₃

4. mg/L as HCO₃⁻

8 / 25

8. Carbonate hardness of water is equal to:

1. Alkalinity

2. Non-carbonate hardness

3. Lesser of total hardness and alkalinity

4. Total hardness

9 / 25

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

1. A B and C

2. B and C

3. A and C

4. A and B

10 / 25

10. High pH in wastewater mainly causes:

1. Corrosion

2. Increased BOD

3. Increased turbidity

4. Scaling

11 / 25

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

1. Chlorine

2. KMnO₄

3. K₂Cr₂O₇

4. Ozone

12 / 25

12. Chlorides in wastewater are determined using:

1. Winkler method

2. Argentometric titration

3. Conductivity method

4. EDTA titration

13 / 25

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

1. Turbidity rod

2. Baylis turbidimeter

3. Nephelometer

4. Jackson’s turbidimeter

14 / 25

14. Municipal sewage is considered highly polluting mainly because:

1. It is acidic in nature

2. It contains high TDS only

3. It contains toxic metals

4. It contains pathogens and biodegradable organic matter

15 / 25

15. Approximate estimation of TDS is commonly done using:

1. EDTA titration

2. Imhoff cone

3. Electrical conductivity

4. Turbidity

16 / 25

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

1. Only bicarbonate

2. OH⁻ and half CO₃²⁻

3. Total alkalinity

4. Only carbonate

17 / 25

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

1. Temperature

2. BOD

3. Turbidity

4. Colour

18 / 25

18. Nitrites are measured using colour development with:

1. Phenol-disulphonic acid

2. Sulphanilic acid and naphthamine

3. EDTA

4. KMnO₄

19 / 25

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

1. A only

2. B only

3. A B and C

4. B and C

20 / 25

20. Which statement is always true?

1. BOD > COD

2. COD < DO

3. COD = BOD

4. COD > BOD

21 / 25

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

1. Partially biodegradable

2. Moderately biodegradable

3. Highly biodegradable

4. Untreatable

22 / 25

22. 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. B

3. D

4. C

23 / 25

23. Suspended solids are best defined as solids which:

1. Pass through 1 µm filter

2. Settle only after coagulation

3. Are soluble in water

4. Are retained by filtration

24 / 25

24. Settleable solids in sewage are measured using:

1. Imhoff cone

2. EDTA titration

3. Conductivity meter

4. Nephelometer

25 / 25

25. 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. Fresh sewage

2. Non-biodegradable

3. Fully treated

4. Highly biodegradable

Your score is

The average score is 40%

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