Fluid Mechanics Mcqs

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

The flow in a pipe or channel is said to be uniform when

The variation in the volume of a liquid with the variation of pressure is called its

The absolute pressure is equal to

When a body is placed over a liquid, it will sink down if

An average value of coefficient of velocity is

All the terms of energy in Bernoulli's equation have dimension of

The total energy line lies over the hydraulic gradient line by an amount equal to the

Unit of surface tension is

The coefficient of discharge for an external mouthpiece depends upon

The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

Hot wire anemometer is used to measure

Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

In a venturi-flume, the flow takes place at

The flow in which each liquid particle has a definite path and their paths do not cross each other is called

A point, in a compressible flow where the velocity of fluid is zero, is called

In an immersed body, centre of pressure is

In a reciprocating pump, air vessels are used to

Density of water is maximum at

Gradually varied flow is

The centre of gravity of the volume of the liquid displaced is called

An impulse turbine is used for

Piezometer is used to measure

The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as

The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

The velocity at which the laminar flow stops, is known as

The meatcentric height is the distance between the

A flow is called hyper-sonic, if the Mach number is

A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

Reynold's number is the ratio of the inertia force to the