Question: In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is
[A].

less

[B].

more

[C].

equal

[D].

unpredictable

Answer: Option A

Explanation:

No answer description available for this question.

Question: In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
[A].

compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller.

[B].

maintaining vacuum on tube side is more difficult than that on the shell side.

[C].

water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam.

[D].

condenser can act as a storage unit for condensed steam.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In radiative heat transfer, a grey surface is the one, which has
[A].

emissivity independent of wavelength.

[B].

grey appearance to the eye.

[C].

zero reflectivity.

[D].

equal brightness in all directions.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of
[A].

steel

[B].

glass wood

[C].

copper

[D].

fireclay bricks

Answer: Option B

Explanation:

No answer description available for this question.

Question: Gage pressure within a spherical droplet of a fluid is ‘p’. What will be gage pressure within a bubble of the same size & of the same fluid ?
[A].

p

[B].

2 p

[C].

0.5 p

[D].

0.25 p

Answer: Option B

Explanation:

No answer description available for this question.

Question: A fluid is termed as the Newtonion fluid, when the shear stress is __________ the velocity gradient.
[A].

independent of

[B].

inversely proportional to

[C].

directly proportional to

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Existence of velocity potential implies that the fluid is
[A].

irrotational

[B].

ideal

[C].

compressible

[D].

in continuum

Answer: Option A

Explanation:

No answer description available for this question.

Question: Current asset of a factory includes the
[A].

goodwill of the company.

[B].

common stocks held by the company.

[C].

manufacturing plant & equipment.

[D].

inventory.

Answer: Option C

Explanation:

No answer description available for this question.