Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 4 (Q.No. 4)
4.
The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by
Discussion:
5 comments Page 1 of 1.
Kalpita said:
9 years ago
Why not the answer should be C?
Maverick kuki said:
9 years ago
Can someone give an explanation?
Tanmay Shah said:
7 years ago
I think B & C both options are correct.
RWD said:
5 years ago
Actually the factors which are effects on the emissivity are.
Material. Non-metals, usually have a high emissivity and are usually fairly constant over time Surface. Polished and shiny surfaces tend to have lower emissivity.
Viewing angle.
Wavelength.
Geometry.
Temperature.
So, option 2 is correct.
Material. Non-metals, usually have a high emissivity and are usually fairly constant over time Surface. Polished and shiny surfaces tend to have lower emissivity.
Viewing angle.
Wavelength.
Geometry.
Temperature.
So, option 2 is correct.
Chayanika said:
6 months ago
Option C is the correct answer.
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