With respect to fluid flow, match the following in Column X with Column Y:
| Column X | Column Y | ||
|---|---|---|---|
| P. | Viscosity | I. | Mach number |
| Q. | Gravity | II. | Reynolds number |
| R. | Compressibility | III. | Euler number |
| S. | Pressure | IV. | Froude number |
Which one of the following combinations is correct?
A rectangular channel with Gradually Varied Flow (GVF) has a changing bed slope. If the change is from a steeper slope to a steep slope, the resulting GVF profile is
Two reservoirs are connected by two parallel pipes of equal length and of diameters 20 cm and 10 cm, as shown in the figure (not drawn to scale). When the difference in the water levels of the reservoirs is 5 m, the ratio of discharge in the larger diameter pipe to the discharge in the smaller diameter pipe is ___________. (round off to two decimal places)
Consider only loss due to friction and neglect all other losses. Assume the friction factor to be the same for both the pipes)
Depth of water flowing in a 3 m wide rectangular channel is 2 m. The channel carries a discharge of 12 m3/s. Take g = 9.8 m/s2. The bed width (in m) at contraction, which just causes the critical flow, is _________ without changing the upstream water level. (round off to two decimal places)