Hydraulics Questions Set 2:
In a rectangular channel, the ratio of the velocity head to the flow depth for critical flow condition is
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The difference of water levels at the head race and tail race of a turbine is called the _____ head.
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Which of the following is a non-recording rain gauge?
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The type of spillway in which a closed channel is used to convey discharge around or under the dam is called
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For a given discharge in an open channel there are two depths which have the same specific energy. These two depths are called as
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The relationship between the length scale ratio (Lr) and the velocity scale ratio (Vr) in hydraulic models, in which Froude dynamic similarity is maintained is:
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The desired hydraulic efficiency of a Kaplan turbine is 98% at a whirl velocity of 20 m/s and a head of 60 m. What should be the blade velocity of the turbine at the inlet in m/s? Take g = 10 m/s²
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In an inward flow reaction turbine, the velocity of flow at the inlet is 2 m/s. If the guide vanes make an angle of 30° to the tangential velocity direction of the runner, what is the absolute velocity of the water leaving the guide vanes?
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A rectangular channel of 2.5 m width is carrying a discharge of 4 m3/s. Considering that acceleration due to gravity as 9.81 m/s2, the velocity of flow (in m/s) corresponding to the critical depth (rounded off to one decimal place) at which the specific energy is minimum is________.
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In a laboratory, a flow experiment is performed over a hydraulic structure. The measured values of discharge and velocity are 0.05 m3/s and 0.25 m3/s respectively. If the full-scale structure (30 times bigger) is subjected to a discharge of 270 m3/s, then the time scale (model to full scale) value (up to two decimal places) is ______.
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