List of top Civil Engineering Questions on Fluid Mechanics

For flowing through the same discharge, the diameters of a pipe at section 1 and section 2 are 50 mm and 100 mm respectively. If the velocity of fluid at section 1 is 8 m/s, then the velocity at section 2 is
If the coefficient of discharge and coefficient of velocity for an orifice are 0.63 and 0.75 respectively, then the coefficient of contraction is
In a pipe flow, the hydraulic grade line will be obtained by the summation of
At a certain point in oil, the shear stress and velocity gradient are 0.2 N/m$^2$ and 0.1 s$^{-1}$ respectively, then the dynamic viscosity is
If the diameter of droplet and surface tension of water are 0.05 mm and 0.075 N/m respectively, then the pressure inside of droplet in excess of the outside pressure intensity is
When a body is immersed in a fluid either wholly or partially, it is lifted up by a force which is equal to the weight of the fluid displaced by the body is known as
The specific gravity and height of mercury in a column are 13.6 and 20 cm respectively. For the same maximum pressure at the bottom, the equivalent height of water column is
A flat plate of 0.15 m\(^2\) is pulled at 20 cm/s relative to another plate, fixed at a distance of 0.02 cm from it with a fluid having \( \mu = 0.0014 \, \text{Ns/m}^2 \) separating them. The power required to maintain the motion is ...........
The flow of a liquid at constant rate in a conically tapered pipe is classified as ...........
Magnitude of the component of velocity at point (1,1) for a stream function \( \Psi = x^2 - y^2 \) is equal to ............
A wide channel is 1 m deep and has a velocity of flow \( V = 2.13 \, \text{m/s} \). If a disturbance is caused, an elementary wave can travel upstream with a velocity of ............
The maximum diameter that a capillary tube can have to ensure that a capillary rise of at least 6 mm is achieved when the tube is dipped into a body of liquid with surface tension \( = 0.08 \, \text{N/m} \) and density \( = 900 \, \text{kg/m}^3 \) is ...........
A sphere of 150 mm diameter is held in equilibrium by a vertical air stream of velocity 15 m/s. If the density of air is \( 1.225 \, \text{kg/m}^3 \) and the coefficient of drag is 0.43, the weight of the sphere is ...........
A 75 mm diameter pipe of 500 m length operates under a head of 60 m at its inlet. If a nozzle is fitted at its outlet, then for most efficient conditions, the velocity of flow from the nozzle (with \( C_v = 1 \)) is .........
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is $ 0.1 \, \text{kg/cm}^2 $, the pressure at a depth of $ 2.5 \, \text{m} $, is
Bishop's simplified method of slices satisfies
A pitot tube is used to measure
A square lamina (each side equal to 2m) is submerged vertically in water such that the upper edge of the lamina is at a depth of 0.5 m from the free surface. What will be the total water pressure (in kN) on the lamina? (take \( \gamma_w = 10 \, \text{kN/m}^3 \))
An ideal flow of a liquid obeys:
In which of the following cases, the hydraulic jump is not possible?
For critical flow conditions in rectangular channels, which of the following is the correct relationship between critical depth \( y_c \) and specific energy \( E \)?