Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > In a depressed nappea)the pressure below the ...
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In a depressed nappe
- a)the pressure below the nappe is atmospheric
- b)the pressure below the nappe is negative
- c)the pressure above the nappe is atmospheric
- d)the pressure above the nappe is negative
Correct answer is option 'B'. Can you explain this answer?
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In a depressed nappea)the pressure below the nappe is atmosphericb)the...
This air is carried away by the flowing water, which results in creating a negative pressure beneath the nappe. The negative pressure drags the lower side of the nappe towards the surface of the weir wall. This results in more discharge than the normal discharge. In order the keep the atmospheric pressure in the space below the nappe holes are made through the channel walls which are connected through the pipes to the atmosphere as shown in figure. Such holes are called 'Ventilation' of a weir.
SO OPTION B IS CORRECT.
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In a depressed nappea)the pressure below the nappe is atmosphericb)the...
This air is carried away by the flowing water, which results in creating a negative pressure beneath the nappe. The negative pressure drags the lower side of the nappe towards the surface of the weir wall. This results in more discharge than the normal discharge. In order the keep the atmospheric pressure in the space below the nappe holes are made through the channel walls which are connected through the pipes to the atmosphere as shown in figure. Such holes are called 'Ventilation' of a weir.
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In a depressed nappea)the pressure below the nappe is atmosphericb)the...
What is nappe
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In a depressed nappea)the pressure below the nappe is atmosphericb)the pressure below the nappe is negativec)the pressure above the nappe is atmosphericd)the pressure above the nappe is negativeCorrect answer is option 'B'. Can you explain this answer?
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