Heat Transfer

According to Wien’s law, the wavelength corresponding to maximum energy is proportion to ________________?

Byadmin January 24, 2019August 16, 2021

According to Wien’s law, the wavelength corresponding to maximum energy is proportion to ________________?

A. absolute temperature (T)
B. I2
C. f
D. t
E. 1/r

Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

According to Prevost’s theory of exchanges, every body irrespective of its temperature continuously emit heat radiations to the surrounding bodies and at the same time receives heat radiations from the surrounding bodies.

Question: According to Prevost’s theory of exchanges, every body irrespective of its temperature continuously emit heat radiations to the surrounding bodies and at the same time receives heat radiations from the surrounding bodies.
[A].

True
[B].
False

Answer: Option A

Explanation:

No answer description available for this question.

Read More According to Prevost’s theory of exchanges, every body irrespective of its temperature continuously emit heat radiations to the surrounding bodies and at the same time receives heat radiations from the surrounding bodies.
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

A refrigerant compressor is used to

Question: A refrigerant compressor is used to
[A].

raise the pressure of the refrigerant
[B].
raise the temperature of the refrigerant
[C].
circulate the refrigerant through the refrigerating system
[D].
all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Read More A refrigerant compressor is used to
CHEMICAL ENGINEERING | Heat Transfer

Fourier’s law applies to the heat transfer by

Question: Fourier’s law applies to the heat transfer by
[A].

convection
[B].
radiation
[C].
conduction
[D].
all (a), (b) & (c)

Answer: Option C

Explanation:

No answer description available for this question.

Read More Fourier’s law applies to the heat transfer by
CHEMICAL ENGINEERING | Heat Transfer

Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because

Question: Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
[A].

convection becomes important
[B].
conduction becomes important
[C].
radiation becomes important
[D].
sub-cooled boiling occurs

Answer: Option C

Explanation:

No answer description available for this question.

Read More Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
Heat Transfer

In heat exchangers, degree of approach is defined as the difference between temperatures of________________?

In heat exchangers, degree of approach is defined as the difference between temperatures of________________?

A. cold water inlet and outlet
B. hot medium inlet and outlet
C. hot medium outlet and cold water inlet
D. hot medium outlet and cold water outlet
E. none of the above

Read More In heat exchangers, degree of approach is defined as the difference between temperatures of________________?
CHEMICAL ENGINEERING | Heat Transfer

(NGr x NPr) is called the __________ number.

Question: (NGr x NPr) is called the __________ number.
[A].

Graetz
[B].
Reyleigh
[C].
Nusselt
[D].
Stanton

Answer: Option B

Explanation:

No answer description available for this question.

Read More (NGr x NPr) is called the __________ number.

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