In a submerged rectangular weir, an arrangement for aeration of nappe is essential for which of the following reasons?
In a submerged rectangular weir, aeration of the nappe is essential to:
Prevent formation of partial vacuum beneath the nappe.
Ensure that the pressure under the nappe remains at atmospheric pressure.
This condition maintains a stable and predictable head–discharge relationship, which is independent of time.
Without proper aeration, fluctuating pressures develop below the nappe, causing unstable discharge measurements and unreliable results.
Which of the following is the SI unit of specific volume?
Identify the true statement for centrifugal pump hen compared with reciprocating pump?
Which of the following statements is true in the case of centrifugal pump which compared to reciprocating pump?
The difference between the total head line and the hydraulic grade line represents the:
In a submerged rectangular weir, an arrangement for aeration of nappe is essential for which of the following reasons?
A spherical water drop of diameter 2 mm splits in to 8 small drops of equal size in air at temperature of 25°C. The surface tension coefficient of water in air is 0.073 N/m and dynamic viscosity is 0.01 poise. The approximate work done in splitting up the drop is
The velocity field of a certain two dimensional flow is given by V (x, y )= k where k = 2 / s and x and y are in meters. If the fluid density is 100 kg/ and pressure at origin is 10 kPa, what is the pressure at point (3,3)?
Examine the following statements:
(i) Euler’s equation is applicable to inviscid liquid
(ii) Bernoulli’s equation applicable to steady state
(iii) Viscous forces are not considered in Navier Stokes equation
(iv) Surface tension and compressibility forces are considered in Navier Stokes equation
A cylindrical body of diameter 2 m and height 1.5 m having a mass of 2 tonnes and floats in sea water with its axis vertical. A lighting equipment is placed on the body such that the water level is at least 0.5 m below the top surface. What is the maximum mass of the electrical equipment that can be placed on the body. (The specific gravity of sea water may be taken as 1.02 and π = 3.14)
Which of the following is the SI unit of specific volume?
