Multiple choice

Which two types of impurities are separated by sand removal tank?

  1. Rays and tissue papers

  2. Pebbles and sand

  3. Detergents and grass pieces

  4. Oil and grease

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sand removal tanks are designed to trap heavy, settleable inorganic solids through sedimentation. Pebbles and sand particles settle to the bottom due to their weight, while lighter materials like oils, grease, and organic debris remain suspended or float for later removal stages.