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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is

4.1 sec
10.4 sec
14.1 sec
5.2 sec

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Hydraulics and Fluid Mechanics in ME
The maximum discharge over a broad crested weir is

0.384 Cd × L × H3/2
1.71 Cd × L × H3/2
0.384 Cd × L × H1/2
1.71 Cd × L × H1/2

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Hydraulics and Fluid Mechanics in ME
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)

(w Hm Q) / ηo
(w Hm) / (Q × ηo)
(w Q) / (Hm × ηo)
(w Q ηo) / Hm

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Hydraulics and Fluid Mechanics in ME
The height of a water column equivalent to a pressure of 0.15 MPa is

15.3 m
25.3 m
45.3 m
35.3 m

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Hydraulics and Fluid Mechanics in ME
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

43924
27/8
43892
44078

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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 speed of the wheel is

20 r.p.m.
40 r.p.m.
10 r.p.m.
80 r.p.m.

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