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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

specific gravity of liquids
specific gravity of solids
specific gravity of gases
relative humidity

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Hydraulics and Fluid Mechanics in ME
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be

10m
100m
None of these
1 m

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Hydraulics and Fluid Mechanics in ME
Which of the following meters is not associated with viscosity

Red wood
Engler
Orsat
Say bolt

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Hydraulics and Fluid Mechanics in ME
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by

Some other alterations in the impeller
Trimming the impeller size to the required size by machining
Not possible
Designing new impeller

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Hydraulics and Fluid Mechanics in ME
A streamline is defined as the line

along which the pressure drop is uniform
parallel to outer surface of pipe
of equal yelocity in a flow
parallel to central axis flow

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Hydraulics and Fluid Mechanics in ME
The specific weight of water is 1000 kg/m3

At mean sea level
At 4°C temperature
All of the listed here
At normal pressure of 760 mm

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