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CHEMICAL ENGINEERING

Heat waves

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: Heat waves
[A].

can not pass through vacuum.

[B].

travel in straight line.

[C].

can be reflected by a mirror.

[D].

both (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Heat waves Read More »

CHEMICAL ENGINEERING, Heat Transfer

In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator.

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator.
[A].

increases

[B].

decreases

[C].

remains constant

[D].

may increase or decrease, depends on the vacuum

Answer: Option A

Explanation:

No answer description available for this question.

In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator. Read More »

CHEMICAL ENGINEERING, Heat Transfer

is called the __________ number

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: is called the __________ number
[A].

Peclet

[B].

Stanton

[C].

Graetz

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

is called the __________ number Read More »

CHEMICAL ENGINEERING, Heat Transfer

A graph between __________ is called Wilson plot.

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: A graph between __________ is called Wilson plot.
[A].

[B].

[C].

v0.8 Vs . U

[D].

Answer: Option A

Explanation:

No answer description available for this question.

A graph between __________ is called Wilson plot. Read More »

CHEMICAL ENGINEERING, Heat Transfer

h.D/K is called the __________ number.

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: h.D/K is called the __________ number.
[A].

Nusselt

[B].

Peclet

[C].

Rayleigh

[D].

Grashoff

Answer: Option A

Explanation:

No answer description available for this question.

h.D/K is called the __________ number. Read More »

CHEMICAL ENGINEERING, Heat Transfer

Convective heat transfer, in which heat is transferred by movement of warmed matter is described by

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: Convective heat transfer, in which heat is transferred by movement of warmed matter is described by
[A].

Fourier’s law

[B].

Newton’s law of cooling

[C].

Fick’s law

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Convective heat transfer, in which heat is transferred by movement of warmed matter is described by Read More »

CHEMICAL ENGINEERING, Heat Transfer

While the total emissivity of a perfect black body is unity, the same for a real body is

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: While the total emissivity of a perfect black body is unity, the same for a real body is
[A].

0

[B].

1

[C].

> 1

[D].

between 0 and 1

Answer: Option D

Explanation:

No answer description available for this question.

While the total emissivity of a perfect black body is unity, the same for a real body is Read More »

CHEMICAL ENGINEERING, Heat Transfer

is termed as the __________ number.

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: is termed as the __________ number.
[A].

Grashoff

[B].

Nusselt

[C].

Prandtl

[D].

Stanton

Answer: Option C

Explanation:

No answer description available for this question.

is termed as the __________ number. Read More »

CHEMICAL ENGINEERING, Heat Transfer

For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature)

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature)
[A].

Δt

[B].

Δt2

[C].

Δt3

[D].

Δt

Answer: Option A

Explanation:

No answer description available for this question.

For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) Read More »

CHEMICAL ENGINEERING, Heat Transfer

In the free convection regime of pool boiling, the heat flux is proportional to

CHEMICAL ENGINEERING, Heat Transfer / admin

Question: In the free convection regime of pool boiling, the heat flux is proportional to
[A].

Δt1/2

[B].

Δt2

[C].

Δt5/4

[D].

Δt

Answer: Option C

Explanation:

No answer description available for this question.

In the free convection regime of pool boiling, the heat flux is proportional to Read More »

CHEMICAL ENGINEERING, Heat Transfer