Hydraulics and Fluid Mechanics in ME
Choose the wrong statement. Alcohol is used in manometer, because

It provides suitable meniscus for the inclined tube
It provides longer length for a given pressure difference
Its vapour pressure is low
Its density is less

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Hydraulics and Fluid Mechanics in ME
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if

Diameter of both the pipes is same
Loss of head and discharge of both the pipes is same
Length of both the pipes is same
Loss of head and velocity of flow in both the pipes is same

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