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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

2V/(vr - v)
V/(vr + v)
2V/(vr + v)
V/(vr - v)

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Hydraulics and Fluid Mechanics in ME
Manometer is used to measure

pressure in pipes, channels etc
very low pressure
atmospheric pressure
difference of pressure between two points

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Hydraulics and Fluid Mechanics in ME
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

50 cm
51 cm
52 cm
52.2 cm

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Hydraulics and Fluid Mechanics in ME
Viscous force is the __________ of shear stress due to viscosity and cross-section area of flow.

Ratio
Product
Different
Sum

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Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece is

0.5
0.707
0.375
0.855

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Hydraulics and Fluid Mechanics in ME
Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.

Square of diameter
Fourth power of diameter
Diameter
Cube of diameter

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