ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

6) The process which removes colloidal matter in water

Answer is:

Filtration

7) Pipes for water supply are tested for

Answer is:

All of the

8) The process used for the removal of dissolved carbon dioxide from the supply water is

Answer is:

Aeration

9) Alum increases

Answer is:

Acidity of water

10) Rusting can be prevented by applying coating of

Answer is:

Red lead