Hydraulic Fluid Mechanics MCQs

Question 1

In an immersed body, centre of pressure is

Accepted Answer

Below be centre of gravity

Answer

At the centre of gravity

Answer

Above the centre of gravity

Answer

Could be above or below c.g. depending on density of body and liquid

Question 2

Gauge pressure Is equal to

Accepted Answer

(6) absolute pressure - atmospheric pressure

Answer

Absolute pressure + atmospheric pressure

Answer

Atmospheric pressure - absolute pressure

Answer

Atmospheric pressure - vacuum

Question 3

The equation of continuity of flow is based on the principle of conservation of

Accepted Answer

Mass

Answer

Flow

Answer

Momentum

Answer

Energy

Question 4

For measuring flow by a venturimeter, it should be installed in

Accepted Answer

In any direction and in any location.

Answer

Vertical line

Answer

Inclined line with flow downward

Answer

Inclined line with upward flow

Question 5

Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be

Accepted Answer

1000 kg

Answer

4000 kg

Answer

2000 kg

Answer

8000 kg

Question 6

Flow of water in a pipe about 3 metres in diameter can be measured by

Accepted Answer

Pitot tube

Answer

Orifice plate

Answer

Venturi

Answer

Rotameter

Question 7

True one-dimensional flow occurs when

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 8

Non uniform flow occurs when

Accepted Answer

Velocity, depth, pressure, etc. change from point to point in the fluid flow.

Answer

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

Answer

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

Answer

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

Question 9

Gradually varied-flow is

Accepted Answer

Steady non-uniform

Answer

Steady unifPrm

Answer

Non-steady non-unitorm

Answer

Non-steady uniform