Hydraulics and Fluid Mechanics in ME
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be

from reservoir B to reservoirs C and A
unpredictable
from reservoir C to reservoirs A and B
from reservoir A to reservoirs B and C

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Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will sink down if

None of these
Gravitational force is more than the up-thrust of the liquid
Gravitational force is equal to the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid

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Hydraulics and Fluid Mechanics in ME
The purpose of a surge tank is

To regulate flow of water to turbines by providing necessary retarding head of water
All of these
To eliminate water hammer possibilities
To control the pressure variations due to rapid changes in the pipe line flow

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