Solid Waste Management MCQ with answer and solution

Concept

Sewage is liquid waste carried in sewers. It is not solid waste.

Step-by-step solution

1. Solid waste (refuse) includes garbage, rubbish, street sweepings, plastics, ashes, etc. 2. Sewage is waste water from houses and industries. 3. So sewage is liquid waste, not solid waste.

Explanation

Garbage, street sweepings and plastic waste are all solid waste. Sewage is mostly water (about 99.9%) and flows in sewers. So it is liquid waste.

Why the other options are wrong

A: Garbage (kitchen and food waste) is solid waste. C: Street sweepings are solid waste. D: Plastic waste is solid waste.

Shortcut

Sewage flows in pipes, so it is liquid waste.

Common mistake

Thinking sewage is solid waste because it has some suspended solids.