Multiple choice

Match the following:

 
1. Contaminants a. Solid matter that settles at the bottom in the sedimentation tank.
2. Sludge b. Gaseous fuel produced by the fermentation of organic matter.
3. Biogas c. Dissolved and suspended impurities in sewage.

  1. 1 - c, 2 - a, 3 - b

  2. 1 - c, 2 - b, 3 - a

  3. 1 - a, 2 - c, 3 - b

  4. 1 - a, 2 - b, 3 - c

  5. 1 - b, 2 - a, 3 - c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. Contaminants are the dissolved and suspended impurities in sewage. Sludge is the solid matter that settles at the bottom in the sedimentation tank. Biogas is the gaseous fuel produced by the fermentation of organic matter.

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