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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

0.25 m3/s
1.5 m3/s
0.5 m3/s
2.5 m3/s

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Hydraulics and Fluid Mechanics in ME
Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

wQHd
wQ (Hs - Hd)
wQ (Hs + Hd)
wQHs

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Hydraulics and Fluid Mechanics in ME
Stream lines and path lines always coincide in case of

turbulent flow
laminar flow
uniform flow
steady flow

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Hydraulics and Fluid Mechanics in ME
A Francis turbine is used when the available head of water is

0 to 25 m
None of these
25 m to 250 m
Above 250 m

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Hydraulics and Fluid Mechanics in ME
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

More than
Equal to
Less than
None of these

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Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is given by the equation

N√P / H3
N√P / H²
N√P / H3/2
N√P / H5/4

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