Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME
- Which of the following statement is correct?
- Which of the following statement is correct?
- The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly enlarged to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden enlargement is
- In centrifugal pumps, maximum efficiency is obtained when the blades are
- The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
- Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)
- According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)
- The length of a liquid stream while flowing over a weir __________ at the ends of the sill.
- The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and Cd = Coefficient of discharge)
- The depth of center of pressure of an immersed surface, inclined at an angle 'θ' with the liquid surface lies at a distance equal to __________ the center of gravity.
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A.
In an impulse turbine, the water impinges on the buckets with pressure energy. |
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B.
In a reaction turbine, the water glides over the moving vanes with kinetic energy. |
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C.
In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure. |
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D.
In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes. |