Hydraulics and Fluid Mechanics Questions

• The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
• When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of
• One stoke is equal to
• Viscous force is the __________ of shear stress due to viscosity and cross-sectionar area of flow.
• The power transmitted through the pipe is maximum when the head lost due to friction is equal to
• Water is __________ liquid.
• The water hammer in pipes occurs due to sudden change in the velocity of flowing liquid
• When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
• The buoyancy depends upon the
• For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called
• The liquid used in manometers should have
• The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
• The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
• When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
• When a body is placed over a liquid, it will float if
• The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir
• The tangential velocity of the water element having a free vortex is
• The hydraulic mean depth for a circular pipe of diameter (d) is
• When the Mach number is less than unity, the flow is called
• A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is