Question # 1

A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is

Choose an answer

50 m/s

20 m/s

40 cm/s

5 cm/s

Glycerin has viscosity _____ the viscosity of water:

Choose an answer

More than

Equal to

Less than

None of these

The smooth or steady stream-line flow is know as

Choose an answer

Laminar flow

Turbulent flow

Both a and b

None of the above

Drag force increases if speed of the object moving through the fluid:

Choose an answer

Increases

Decreases

Remains constant

None of these

When the speed of a body in a fluid increases then the drag force

Choose an answer

decreases

becomes zero

increases

non of them

Bernoulli's equation is based upon law of conversation of

Choose an answer

mass

momentum

Energy

None

According to Stoke's law, drag force depends on

Choose an answer

Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

The velocity gained by the fluid in falling through the distance (h_{1 - h}_{2) under the action of gravity is equal to the speed of the action of gravity is equal to the speed of the}

Choose an answer

orifices

efflux

fluid

none of them

When the different streamlines cannot cross each other, then this condition is known as

Choose an answer

continuity condition

turbulent flow condition

steady flow condition

none of them

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

Choose an answer

Is smaller than

Is greater than

Becomes equal to

None of these

Matter is made up of very tiny particles called

Choose an answer

Atoms

Molecules

Ions

None of these

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

Choose an answer

0.1 m

0.2 m

0.98 m

Full length of the capillary tube

Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is

Choose an answer

1/4 times

4 times

Twice

1/2 of 8 cm diameter pipe

Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?

Choose an answer

potential energy

pressure energy

strain energy

(a) and (b) only

In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.

Choose an answer

Streamline, cannot

Turbulent, cannot

Streamline, can

None of these

More Classes

Other Links

ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer