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Leidenfrost point is a term concerned with the

CHEMICAL ENGINEERING, Heat Transfer /
Question: Leidenfrost point is a term concerned with the
[A].

condensation of the saturated vapor on a cold surface.

[B].

concentration of a corrosive solution by evaporation.

[C].

heat transfer between two highly viscous liquids.

[D].

boiling of a liquid on a hot surface.

Answer: Option D

Explanation:

No answer description available for this question.

Leidenfrost point is a term concerned with the Read More »

CHEMICAL ENGINEERING, Heat Transfer

Heat transfer in the laminar sublayer in case of a liquid flowing through a pipe, is mostly by

CHEMICAL ENGINEERING, Heat Transfer /
Question: Heat transfer in the laminar sublayer in case of a liquid flowing through a pipe, is mostly by
[A].

eddies current

[B].

conduction

[C].

convection

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Heat transfer in the laminar sublayer in case of a liquid flowing through a pipe, is mostly by Read More »

CHEMICAL ENGINEERING, Heat Transfer

Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.

CHEMICAL ENGINEERING, Heat Transfer /
Question: Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.
[A].

1 to 100

[B].

0.5 to 50

[C].

10 to 100

[D].

100 to 1000

Answer: Option B

Explanation:

No answer description available for this question.

Electro-magnetic spectrum range, which is important for radiation varies from __________ microns. Read More »

CHEMICAL ENGINEERING, Heat Transfer

With increase in porosity, the thermal conductivity of a solid substance

CHEMICAL ENGINEERING, Heat Transfer /
Question: With increase in porosity, the thermal conductivity of a solid substance
[A].

increases

[B].

decreases

[C].

remains unchanged

[D].

may increase or decrease; depends on the solid

Answer: Option B

Explanation:

No answer description available for this question.

With increase in porosity, the thermal conductivity of a solid substance Read More »

CHEMICAL ENGINEERING, Heat Transfer

In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate.

CHEMICAL ENGINEERING, Heat Transfer /
Question: In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate.
[A].

geometric

[B].

arithmetic

[C].

logarithmic

[D].

either (a), (b) or (c)

Answer: Option C

Explanation:

No answer description available for this question.

In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate. Read More »

CHEMICAL ENGINEERING, Heat Transfer