Hydraulic Fluid Mechanics MCQs

Question 1

Velocity distribution in the turbulent 'boundary layer follows following law

Accepted Answer

Logarithmic

Answer

Linear

Answer

Square

Answer

Parabola

Question 2

Uniform flow occurs when

Accepted Answer

The magnitude and direction of the velocity do not change from point to point in the fluid

Answer

The direction and magnitude of the velocity at all points are identical

Answer

The velocity of successive fluid paitides, at any point, is the same at successive periods of time

Answer

The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane

Question 3

The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous sream

Accepted Answer

Remains constant

Answer

Keeps on increasing

Answer

Keeps on decreasing

Answer

May increase/decrease

Question 4

Fronde number is significant in

Accepted Answer

Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls

Answer

Supersonics, as with projectile and jet propulsion

Answer

Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

Answer

All of the above

Question 5

A large Roynold number is indication of

Accepted Answer

Highly turbulent flow.

Answer

Smooth and streamline flow

Answer

Steady flow

Answer

Turbulent flow

Question 6

At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Accepted Answer

Could be any value.

Answer

Minimum

Answer

Zero

Answer

Negative value

Question 7

The pressure in Pascals at a depth of 1 m below the free -- -face of a body of water will be equ91

Accepted Answer

9810 Pa

Answer

1 Pa

Answer

98.1Pa

Answer

981 Pa

Question 8

Two pipe systems can be said to be equivalent, when the following quantites are same

Accepted Answer

Friction loss and flow

Answer

Length and diameter

Answer

Flow and length

Answer

Friction factor and diameter

Question 9

Froude number is the ratio of inertial force to

Accepted Answer

Gravitation force

Answer

Surface tension

Answer

Elasticity

Answer

Viscosity