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ISRO Technician-B Plumber 2019
39

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

39) A fresh sewage become stale in

1 hour

3 hours

6 to 8 hours

24 to 36 hours

Answer is:

6 to 8 hours

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

40) _____ traps are used for receiving waste water from kitchen, sinks, baths and rain and surface water from house

Gully

Floor

Intercepting

Reverse

Answer is:

Gully

41) Air relief valves are provided in water supply pipe lines at

Pipe bends

Pipe joints

Summits

LOW points

Answer is:

Summits

42) Bricks are laid

with frog up

with frog down

with frog on side

with frog on face

Answer is:

with frog up

43) Minimum grade of concrete for RCC should be

M10

M15

M20

M25

Answer is:

M20

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

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