The valve shown in the below figure, is generally known as air valve pressure re

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Question
The valve shown in the below figure, is generally known as
Options
A. air valve
B. pressure relief valve
C. sluice valve
D. none of these.

Correct Answer

pressure relief valve

Water Supply Engineering problems

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1. Water gets evaporated from water surfaces and land surfaces, get converted into water drops at lower temperatures, flows over ground surface and finally meets its source, i.e. lake, sea, etc. This entire process is generally known as
Options
A. hydrological cycle
B. water cycle
C. evaporation and precipitation cycle
D. all the above.

2. Pick up the incorrect statement from the following :
Options
A. Free surface ground water is subjected to atmospheric pressure
B. Water table surface rises and falls with seasons
C. Depth of water table is directly proportional to the rate of drawal of water
D. Level of water table remains stationary
E. None of these.

9. Pick up the correct statement from the following :
Options
A. Water with hardness upto 75 ppm is considered soft
B. Water with hardness more than 200 ppm is considered hard
C. Water needed for laundaries should contain hardness less than 75 ppm
D. To provide taste during drinking, water should possess hardness between 75 to 120
E. All the above.

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