Online Mechanical Engineering Test - Hydraulics and Fluid Mechanics Test

The coefficient of discharge for an external mouthpiece is

The volume per unit mass of a liquid is called specific volume.

A compound pipe of diameter d₁, d₂ and d₃ having lengths l₁, l₂ and l₃ is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by

The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

Select the correct statement

The hydraulic mean depth or the hydraulic radius is the ratio of

The hydraulic mean depth for a circular pipe of diameter (d) is

The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

A notch is used to measure __________ of liquids.

A flow is called sonic, if the Mach number is unity.

The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where I_G = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)

A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity.

The magnitude of water hammer depends upon the

According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

The most efficient section of a channel is

The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.

Newton's law of viscosity is a relationship between

The velocity at which the turbulent flow starts is known as higher critical velocity.

When the flow in an open channel is gradually varied, the flow is said to be

A flow through an expanding tube at constant rate is called