ISRO Technician-B Plumber Question Paper - 2017 (Set - 1) with Answer Key

ISRO Technician-B Plumber Question Paper - 2017 (Set - 1) with Answer Key

21) The most common cogulant is

Answer is:

Alum

22) Which of the following is connected with firefighting equipment during fire?

Answer is:

Hydrant

23) Which of the following does not require pumps for the efficient distribution of water?

Answer is:

Gravity system

24) PVC stands for

Answer is:

Polyvinyl Chloride

25) The valve which prevents back flow of water is known as

Answer is:

Check valve

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