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Fluid Mechanics 1: Flow measurement
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Fluid Mechanics 1: Flow measurement
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25 Questions

1. Which of the following is not a way of classifying based on the shape of opening?
2. For discharge over ogee weir discharge is directly proportional to length but for discharge over narrow crested weir it is inversely proportional to length.
3. Find the discharge of water flowing over a rectangular notch of 1.3 m length when the constant head over the notch is 255 mm. Take Cd = .62
4. A notch is a device used to measure the turbulence of the flowing liquid directly.
5. What is not the way of classifying weir based on their shape of crest?
6. The head of water over a rectangular notch is 900 mm. The discharge is 300 litres/s. Find the length of the notch, when CD =.62
7. The weir is an attachable structure made up of thermoplastic.
8. The head of water over a rectangular notch is 700 mm. The discharge is 200 litres/s. Find the length of the notch, when CD =.63
9. The discharge rate is independent of the height difference and dependent only on the height.
10. In case of submerged orifice the discharge is substantially dependent on temperature of fluid
11. The time taken to empty the tank is independent of Cd but depends only on the height and acceleration due to gravity.
12. The notch is bigger in size than wier.
13. When is orifice called ‘large orifice’?
14. What is not the way of classifying weir based on the emerging nappe?
15. In case of submerged orifice the discharge is substantially dependent on temperature of fluid
16. Which of the following is not a way of classifying notches or weirs?
17. Find the discharge over triangular notch of angle 50° when the head over the V notch
18. The MoM (Material of Manufacture) of notch is,
19. In discharge of water over Ogee weir, discharge is directly proportional to the first power of length.
20. Find the discharge of water flowing over a rectangular notch of 1.5 m length when the constant head over the notch is 275 mm. Take Cd = .60
21. In case of any orifice, velocity always remains constant and hence discharge can be calculated.
22. The results of which are more accurate; rectangular notch or triangular weir.
23. Trapezoidal weir has another popular name. What is it?
24. In discharge of water over narrow crested weir, head of water is directly proportional to Discharge Coefficient.
25. Rectangular notch may or may not have ventilation.

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