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A upper tank containing water situated at 20m height from water level of other lower water tank. There is wall between two tanks which is about 4m high from upper tank water level. For supplying the water a syphon of diameter 200 mm and length 500 mm is used with length of pipe from upper water tank to summit is 100m. Coefficient of friction = 0.005, what will happen regarding flow in pipe.
  • a)
    Water flow from upper to lower tank
  • b)
    Dissolved gases and air from water collect at summit
  • c)
    Water flow is obstructed
  • d)
    Both B and C
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A upper tank containing water situated at 20m height from water level...
F = 0.005
Apply Bernoulli’s equation between point 1 & 2
P1 / ρg + V12 / 2g + z1 = P2 / ρg + V22 / 2g + z2+ loss of head due to friction
P1 = P2 = atmospheric pressure and V1 = V2 = 0
So, z1 – z2 = loss of head = 4fLV2 / 2dg
Here, z1 – z2 = 20 = 4×0.005×500×V2/ 2×0.2×9.81
So, V = 2.8 m/s
Pressure at summit, apply Bernoulli equation between 1 & 3
P1 / ρg + V12/2g + z1= P3 / ρg + V32/ 2g + z3 + loss of head due to friction
Take a datum line passing through 1
0 + 0 + 0 = P3 / ρg + 2.82/ 2×9.81 + 4+ 4×0.005×100×2.82 / 2×0.2×9.81
So, P3 /ρg = -8.395 m of water = 1.9 m of water absolute
We know pressure at 3 become less than 2.7 of water absolute, the dissolved air and gasses would come out from water and collect at summit, so flow of water is obstructed.
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A upper tank containing water situated at 20m height from water level of other lower water tank. There is wall between two tanks which is about 4m high from upper tank water level. For supplying the water a syphon of diameter 200 mm and length 500 mm is used with length of pipe from upper water tank to summit is 100m. Coefficient of friction = 0.005, what will happen regarding flow in pipe.a)Water flow from upper to lower tankb)Dissolved gases and air from water collect at summitc)Water flow is obstructedd)Both B and CCorrect answer is option 'D'. Can you explain this answer?
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A upper tank containing water situated at 20m height from water level of other lower water tank. There is wall between two tanks which is about 4m high from upper tank water level. For supplying the water a syphon of diameter 200 mm and length 500 mm is used with length of pipe from upper water tank to summit is 100m. Coefficient of friction = 0.005, what will happen regarding flow in pipe.a)Water flow from upper to lower tankb)Dissolved gases and air from water collect at summitc)Water flow is obstructedd)Both B and CCorrect answer is option 'D'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A upper tank containing water situated at 20m height from water level of other lower water tank. There is wall between two tanks which is about 4m high from upper tank water level. For supplying the water a syphon of diameter 200 mm and length 500 mm is used with length of pipe from upper water tank to summit is 100m. Coefficient of friction = 0.005, what will happen regarding flow in pipe.a)Water flow from upper to lower tankb)Dissolved gases and air from water collect at summitc)Water flow is obstructedd)Both B and CCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A upper tank containing water situated at 20m height from water level of other lower water tank. There is wall between two tanks which is about 4m high from upper tank water level. For supplying the water a syphon of diameter 200 mm and length 500 mm is used with length of pipe from upper water tank to summit is 100m. Coefficient of friction = 0.005, what will happen regarding flow in pipe.a)Water flow from upper to lower tankb)Dissolved gases and air from water collect at summitc)Water flow is obstructedd)Both B and CCorrect answer is option 'D'. Can you explain this answer?.
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