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

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

61) The best system of artificial ventilation is

Answer is:

Air conditioning

62) Temporary hardness can be removed by

Answer is:

Boiling

63) If V is the velocity of flow through a pipe and A is the area of cross section, the rate of flow, Q is calculated using the formula

Answer is:

Q=V*A

64) Greasy and other substances which float at the surface of the sewage in a sewage treatment plant is called

Answer is:

Scum

65) Maximum Gradient given for 150 mm Drain pipe

Answer is:

1:30

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