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ISRO Technician-B Plumber 2019
6

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

6) The process which removes colloidal matter in water

Filtration

Disinfection

Sedimentation

Screening

Answer is:

Filtration

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

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

7) Pipes for water supply are tested for

Leakage

Dimensions

Pressure

All of the

Answer is:

All of the

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

Coagulation

Agitation

Sedimentation

Aeration

Answer is:

Aeration

9) Alum increases

Hardness of water

Carbonates in water

Sulphates in water

Acidity of water

Answer is:

Acidity of water

10) Rusting can be prevented by applying coating of

White lead

Bitumen

Red lead

Zinc oxide

Answer is:

Red lead

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

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