Municipal Solid Waste Management Week 7 NPTEL Assignemt Answers 2025

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✅ Subject: Municipal Solid Waste Management
📅 Week: 7
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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NPTEL Municipal Solid Waste Management Week 7 Assignemt Answers 2025

1. What is the typical composting time for a silo?

• 7 days
• 14 days
• 21 days
• 28 days

Answer : See Answers

2. One of the limitations of the rotary drum composter is:

• Short composting period
• Temperature reaches up to 65-70 ˚C
• Less Space requirement
• Capital cost

Answer :

3. What is the composting period for the rotary drum composting process?

• 12-20 days
• 20-30 days
• 30-60 days
• 45- 190 days

Answer :

4. Which one is an important biological parameter analysed during the composting process?

• Water holding capacity
• pH
• Available phosphorus
• sBOD

Answer :

5. Organic acid production happens at which stage of the composting process?

• Growth
• Active stabilization
• Cooling
• Maturation

Answer :

6. What is the recommended fecal coliform density for compost hygeinazation in MPN/g?

• 50
• 500
• 5000
• 50000

Answer : See Answers

7. What is the maximum limit of Cd in compost as per CPCB, 2006, India, in mg/kg on dry basis?

• 1
• 2
• 5
• 10

Answer :

8. Which type of worm builds burrows in the upper layer of soil?

• Anaciec
• Endogiec
• Epigiec
• All of these

Answer :

9. What is the duration of the life cycle for Eisenia fetida?

• 46 days
• 50 days
• 60 days
• 70 days

Answer :

10. What is the solution if the bedding is too acidic, causing the worms to crawl through the holes of the bin in vermicomposting?

• Add egg shells and cut down on the amount of citrus peels, tomatoes, coffee grounds and other acidic food waste
• Don’t add any more food for a week or two
• Gently stir the entire contents to allow more air in and stop adding food waste for a week or so
• The lid can be removed or left slightly ajar to allow the contents to dry out

Answer :  See Answers