Solid Waste Management MCQ with answer and solution

Concept

Composting Methods (Bangalore and Indore Methods)

Formula

N/A

Step-by-step solution

1. Analyze the composting mechanisms used in the Bangalore and Indore methods. 2. Recall that the Bangalore method is an anaerobic process, whereas the Indore method is an aerobic process. 3. Select Option C as the correct answer.

Explanation

The Bangalore method is an anaerobic process because decomposition happens without air/oxygen inside covered pits. In contrast, the Indore method is an aerobic process because it requires air and oxygen, which is provided by turning the waste heap regularly. Therefore, the correct answer is Option C.

Shortcut

To easily remember the difference between the Bangalore and Indore composting methods, use this simple memory trick: - Bangalore = Anaerobic: Think "B" for Burying waste (pits are covered and decomposition happens without air/oxygen). - Indore = Aerobic: Think "I" for Inflow of air (waste is regularly turned to expose it to oxygen).

Common mistake

A common mistake is selecting option D by confusing the order of the two processes, incorrectly assuming the Bangalore method is aerobic and the Indore method is anaerobic. Students also frequently choose option B by assuming that all standard city-scale composting operations are entirely aerobic, forgetting that the Bangalore method relies on anaerobic decomposition in covered pits without turning.