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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The unit of surface tension is

N-m
N/m3
N/m2
N/m

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Hydraulics and Fluid Mechanics in ME
The specific speed of a centrifugal pump, delivering 750 liters of water per second against a head of 15 meters at 725 r.p.m., is

248 r.p.m
24.8 r.p.m.
82.4 r.p.m.
48.2 r.p.m

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Hydraulics and Fluid Mechanics in ME
An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be

10 kN/m2
4 kN/m2
14 kN/m2
12 kN/m2

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Hydraulics and Fluid Mechanics in ME
The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

Mechanical efficiency
Manometric efficiency
Volumetric efficiency
Overall efficiency

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Hydraulics and Fluid Mechanics in ME
When the Mach number is between ___ the flow is called super-sonic flow.

2.5 and 4
1 and 6
1 and 2.5
4 and 6

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Hydraulics and Fluid Mechanics in ME
A pitot tube is used to measure the

Total pressure of liquid flowing in a pipe
Pressure difference between two points in a pipe
Discharge through a pipe
Velocity of flow at the required point in a pipe

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