Hydraulic Fluid Mechanics MCQs

Question 1

A hydraulic ram acts like

Accepted Answer

An impulse pump

Answer

A centrifugal pump

Answer

A rotary pump

Answer

A reciprocating pump

Question 2

Hydraulic ram is a device used

Accepted Answer

Lift water without electric motor

Answer

To accelerate water flow

Answer

For lifting heavy load

Answer

Beat water and lift it

Question 3

The discharge throudl _a syphon spillway is equal to Cd x a x -12g x

Accepted Answer

H5/2

Answer

4H

Answer

H

Answer

H3/2

Question 4

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

Accepted Answer

Avoid interruption in the flow.

Answer

Maintain pressure difference

Answer

Increase velocity

Answer

Control pressure variations

Question 5

A fluid flow taking place continuously round a curved path about a fixed axis of rotation, is known as

Accepted Answer

Vortex flow.

Answer

Rotational flow

Answer

Circular flow

Answer

Unsteady flow

Question 6

When a liquid rotates at constant angular velocity about a vertical axis as a rigid body, the pressure

Accepted Answer

Varies as the square of the radial distance

Answer

Decreases as the square of the radial distance

Answer

Increases linearly as the radial distance

Answer

Varies inversely as the elevation along any vertical line

Question 7

In a free vortex motion

Accepted Answer

Each particle moves' in a circular path with a speed varying inversely as the distance from the centre

Answer

Rotation of fluid, moving as a solid, takes place about an axis

Answer

Velocity decreases with the radius

Answer

Velocity remains constant

Question 8

The critical velocity as

Accepted Answer

Velocity above which the flow ceases to be streamlined

Answer

Maximum attainable velocity

Answer

Terminal velocity

Answer

Velocity when hydraulic jump occurs

Question 9

The rise of-liquid along the walls of a revolving cylinder as compared to depression at the centre w.r.t. initial level is

Accepted Answer

Same

Answer

More

Answer

Less

Answer

More/less depending on speed