Hydraulic Fluid Mechanics MCQs

Question 1

The region downstream from the streamline where separation takes place from the boundary is known as

Accepted Answer

Wake

Answer

Lift

Answer

Drag

Answer

Cavitation

Question 2

Choose the wrong statement about flow nets

Accepted Answer

Flow nets are drawn to indicate flow patterns in case of one dimensional flow

Answer

Flow net consists of a system of streamlines so spaced that the rate of flow is the same between each successive pair of lines

Answer

Flow net consists of another system of lines normal to the streamlines and so spaced that the distance between the normal lines equals the distance between adjacent streamlines

Answer

An infinite number of streamlines are required to describe completely the flow under given boundary condition

Question 3

The continuity equation

Accepted Answer

8.287. Equation of continuity of flow is based on the principle of conservation of (where Re = Reynolds number).

Answer

Is based on Bernoulli's theorem

Answer

Expresses relation between work and energy, expresses relation between hydraulic parameters of flow relates the mass rate of flow along a streamline

Answer

(e) is used to determine flow by pitot tube.

Question 4

Equation of continuity of flow is based on the principle of conservation of (where Re = Reynolds number).

Accepted Answer

Mass

Answer

(c) momentum

Answer

(a) Re

Answer

(c) Re1/2

Question 5

Bernoulli's theorem deals with the conservation of

Accepted Answer

Energy

Answer

Mass

Answer

(c) momentum

Answer

(b) force

Question 6

An air vessel is usnally provided at the summit of a syphon in order to

Accepted Answer

Avoid interruption in flow

Answer

Regulate the flow

Answer

Increase discharge

Answer

Increase velocity

Question 7

The flow at critical depth in an open channel is

Accepted Answer

Maximum

Answer

Minimum

Answer

Zero

Answer

Half of normal flow

Question 8

Tube is an opening

Accepted Answer

With prolonged sides having length of 2-3 diameters of opening in thick wall

Answer

With closed perimeter and of regular form through which water flows

Answer

With partially full flow

Answer

In hydraulic structure with regulation pi ?vision

Question 9

Highest efficiency is obtained with following channel section

Accepted Answer

Trapezoidal.

Answer

Circular

Answer

Rectangular

Answer

Quadrant