Civil Engineering - Hydraulics - Discussion
Discussion Forum : Hydraulics - Section 1 (Q.No. 4)
4.
The maximum vacuum created at the summit of a syphon is
Discussion:
25 comments Page 1 of 3.
Abhishek Anand said:
8 years ago
The pressure at summit point will be less than the atmospheric pressure . Theoretically, the pressure at summit may be reduced to 10.3 m of water but in actual practice, this pressure is only 7.6 m of water or 10.3-7.6= 2.7m of water absolute. if the pressure at summit become less than 2.1m of water absolute, the dissolved air and other gases would come out from water and collect at the summit.the flow of water will be obstructed.
Jibin said:
4 years ago
The pressure at the summit is always less than atmospheric pressure. So, the highest point according to options is 7.4 that is less than 10.33, so the answer B is correct.
(6)
Vivek said:
8 years ago
It should be less than 7.8 because if it goes above 7.8 dissolved gases in the liquid will come out and accumulated at a summit and will stop flow of water.
Sunil said:
5 years ago
The pressure is only -7.6m of water or 10.3-7.6= 2.7 m of water absolute.
p vacuum = p atm - p absolute.
So maximum vacuum = 10.3-2.7 = 7.6 m.
p vacuum = p atm - p absolute.
So maximum vacuum = 10.3-2.7 = 7.6 m.
(5)
Gopi said:
1 decade ago
It is the highest point hill is called summit syphon is bend pipe. It is flowing of water to higher elevation to lower elevation.
Md sharique said:
10 years ago
It is the highest point hill is called summit syphon is bend pipe. It is flowing of water to higher elevation to lower elevation.
Vivek Bahra said:
7 years ago
For water absolute = 2.5.
For water vacuum = 7.8.
Here it is asked for vacuum. Hence the answer is 7.8.
For water vacuum = 7.8.
Here it is asked for vacuum. Hence the answer is 7.8.
Ravi said:
9 years ago
@Pratik.
Your answer will satisfy the Condition of cavities. B answer is right.
Your answer will satisfy the Condition of cavities. B answer is right.
Pratik said:
1 decade ago
The answer should be A because vapour pressure head of water is 2.7 m of water.
Syam said:
8 years ago
Here it is 7.4m of Vaccum pressure and 2.5m of absolute pressure for water.
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