Question

How is water used as coolant act as a water pollutant?

• A. Hot water from coolant can kill aquatic life forms
• B. Hot water from coolant decreases the surface tension of water
• C. Hot water holds lesser amounts of dissolved oxygen
• D. All of the above

Answer 1

Answer: (A), (C)

The correct options are
A Hot water from coolant can kill aquatic life forms
C Hot water holds lesser amounts of dissolved oxygen

Aquatic life forms need a certain optimum temperature for surviving. When hot water from coolants is poured directly into the water body, the temperature fluctuation can adversely affect fish. The hot water also has low percentage of dissolved oxygen and thus, increases the BOD of the water as well.