What are the sources of water ?
Ans: The sources of water are -
1. Rain water - we get it from sky.
2. Surface water - we get it from river, sea, pond.
3. Underground water - we get it under the soil.
i. subsoil water (under 20ft -100ft up)
ii. deep well water (under 200ft - 300ft up)
Ans: The sources of water are -
1. Rain water - we get it from sky.
2. Surface water - we get it from river, sea, pond.
3. Underground water - we get it under the soil.
i. subsoil water (under 20ft -100ft up)
ii. deep well water (under 200ft - 300ft up)
Among these, deep well water is preferable for wet processing.
What is PPM ?
Ans: PPM(parts per million): The number of grains of calcium carbonates(caco3) which is present in one million grains of water is called PPM.