NPTEL Municipal Solid Waste Management Week 6 Assignment Answers 2024
1. What are the products released after the curing phase of composting?
(a) Pathogens
(b) CO2
(c) Humic substances
(d) Oxygen
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2. The average bacterial population during composting is
(a)106-1012
(b)102-105
(b)1010-1015
(b)1012-1015
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3. Which of the following are the secondary consumers present in compost?
(a) Springtails
(b) Snow bugs
(c) Centipedes
(d) Predatory mites
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4. In which phase of composting Pseudomonads are found?
(a) Curing phase
(b) Active phase
(c) Lag phase
(d) None of these
Answer :-
5. What is the optimum moisture content required for composting?
(a) 20-30%
(b) 30-40%
(c) 40-50%
(d) 50-60%
Answer :-
6. The average fungal population during composting is
(a)106-1012
(b)102-105
(b)1010-1015
(b)1012-1015
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7. What is the desirable organic particle size for composting?
(a) More than 1 cm
(b) Less than 1 cm
(c) 1-2 cm
(d) 2-3 cm
Answer :-
8. What is the ideal C/N ratio for composting?
(a) 30
(b) <15
(c) <30
(d) >30
Answer :-
9. Which of the following is an open process of composting?
(a) vertical flow
(b) inclined
(c) batch
(d) static pile
Answer :-
10. At what temperature do the non-spore formers die during composting?
(a) Above 65 °C
(b) Below 65 °C
(c) Above 20 °C
(d) Below 20 °C
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