FLUID MECHANICS QUIZ

In case of supersonic flow of a fluid through pipeline, the 'Mach number' is

1

> 1

< 1

TRUE ANSWER : ?
YOUR ANSWER : ?

Shear stress in a fluid flowing in a round pipe

Varies parabolically across the cross-section

Is zero at the centre and varies linearly with the radius

Remains constant over the cross-section

Is zero at the wall and increases linearly to the centre

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss

Decreases

Increases

Remains constant

Increases linearly

TRUE ANSWER : ?
YOUR ANSWER : ?

Design of the casing of centrifugal pump should be such as to minimise the

Loss of static head

Back flow through impeller

None of these

Loss of kinetic head

TRUE ANSWER : ?
YOUR ANSWER : ?

Rise of liquid in a capillary tube is due to

Neither A nor B

Adhesion

Both A & B

Cohesion

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of velocity head is

ft-lb/ft³

ft-lbf/sec

ft-lbf/lb

ft-lb/sec

TRUE ANSWER : ?
YOUR ANSWER : ?

The fluid velocity varies as the cube of the cylinderical pipe diameter in case of steady state laminar flow at constant pressure drop for __________ fluid.

Newtonion

Dilatent

Pseudoplastic

Bingham plastic

TRUE ANSWER : ?
YOUR ANSWER : ?

A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.

Non-Newtonion

Ideal

Incompressible

Newtonion

TRUE ANSWER : ?
YOUR ANSWER : ?

High specific speed of a pump implies that, it is a/an __________ pump.

Mixed flow

Axial flow

Centrifugal

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

While starting an axial flow pump, its delivery valve should be kept

Either open or closed

Closed

Open

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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