Falling drops of water become spheres due to
The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as
The length of hydraulic jump is roughly
Most economical section of a circular channel for maximum velocity, is if,
The value of kinetic energy correction factor (a) for a laminar flow through a circular pipe, is
The most efficient channel section, is
Practical fluids possess
The velocity of flow (v) at the outlet of a syphon of length l, is given by
The flow in which each liquid particle has a definite path and the paths of adjacent particles do not cross each other, is called
A rise or fall of liquid in a glass tube of a very small diameter when dipped is
With a clinging nappe of a weir, the excess discharge, is
The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is
The flow in open channel is laminar if the Reynold number is
To measure very low pressure, we use
The formula Q = m x L x 2g x H3/2 where was suggested by :
For steady flow in open channels, which one of the following does not change :
The differential equation dp/ρ + gdz + vdv = 0 for a fluid motion is suggested by
For critical flow, the Froude number is :
If E1 and E2 are the specific energies at the start of back water curve and at the maximum rise of water respectively and ib and ie are the head slope and the energy line slope respectively, the length of back water (L) is given by
A steady uniform flow is through
Cavitation is caused by
For the most economical trapezoidal open channel,
In pipe lines, a surge tank is provided
If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing
Liquids
The instrument used for measuring the velocity of flow, is known as
Flow of water in pipes of diameter more than 3 metres, can be measured by
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