Fluid Mechanics - Section 1

Directions to Solve

Fluid Mechanics - Section 1

There are many problems and MCQs available on Fluid mechanics which
you can solve easily to test your aptitude in fluid mechanic field.

1.

The resistance wire used in a hot wire anemometer for conducting electrical current is made of

A.	copper
B.	tungsten
C.	chromium
D.	aluminium

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

2.

Shear stress in a fluid flowing in a round pipe

A.	varies parabolically across the cross-section.
B.	remains constant over the cross-section.
C.	is zero at the centre and varies linearly with the radius.
D.	is zero at the wall and increases linearly to the centre.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

3.

Pick out the correct statement.

A.	A forced vortex occurs when fluid rotates as a solid about an axis.
B.	In laminar flow, Newton's law of viscosity does not apply.
C.	A free vortex occurs, when fluidrotates as a solid.
D.	In turbulent flow, there are neither cross-currents nor eddies.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

4.

A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ₀ = 10 KPa, is shared between flat parallel plates separated by a distance of 10^-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is

A.	10 KPa
B.	20 KPa
C.	30 KPa
D.	40 KPa

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

5.

For a particle settling in water at its terminal settling velocity, which of the following is true ?

A.	Buoyancy = weight + drag
B.	Weight = buoyancy + drag
C.	Drag = buoyancy + weight
D.	Drag = weight

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

6.

Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.

A.	2 to 3
B.	0.01 to 0.10
C.	200 to 300
D.	100 to 1000

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

7.

__________ pumps are axial flow pumps.

A.	Turbine
B.	Propeller
C.	Diffuser
D.	none of these

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

8.

Dimension of absolute viscosity is

A.	ML-1T-1
B.	MLT-1
C.	ML-1T
D.	MLT

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

1
2
3
4
5
6
7