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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The center of gravity of the volume of the liquid displaced by an immersed body is called

center of buoyancy
center of gravity
center of pressure
metacentre

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Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(2 L.A.N)/60
L.A.N
(L.A.N)/60
2 L.A.N

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Hydraulics and Fluid Mechanics in ME
The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is

Medium speed with radial flow at outlet
High speed with axial flow at outlet
High speed with radial flow at outlet
Slow speed with radial flow at outlet

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Hydraulics and Fluid Mechanics in ME
The total energy line lies over the hydraulic gradient line by an amount equal to the

Velocity head
Pressure head + velocity head
Pressure head
Pressure head - velocity head

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.

Two-third
None of these
One-third
One-half

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Hydraulics and Fluid Mechanics in ME
The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is

32 km
20 km
8 km
4 km

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