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Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 1 (Q.No. 3)
Heat Transfer, Refrigeration and Air Conditioning
3.
Which of the following statement is wrong?
The heat transfer in liquid and gases takes place according to convection.
The amount of heat flow through a body is dependent upon the material of the body.
The thermal conductivity of solid metals increases with rise in temperature,
Logarithmic mean temperature difference is not equal to the arithmetic mean temperature difference.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
31 comments Page 3 of 4.
Amiq Syed said:   7 years ago
The thermal conductivity of solid metal's decrease with the increase of temperature.
(3)
Mohnesh said:   1 decade ago
Thermal conductivity is property. But it is not change with respect to temperature.
Updesh yadav said:   8 years ago
If temperature increases thermal conductivity increases according to made easy.
Sunny said:   7 years ago
Why option A is true?

In liquids in some extent conduction also takes place.
(2)
Gnagadharac rao said:   9 years ago
Thermal conductivity depends on the metal property, and not temperature.
Bir Bahadur Singh(Prakash Kumar) said:   1 decade ago
Thermal conductivity is inversely proportional to temperature gradient.
Netrapal said:   9 years ago
Thermal conductivity is directly proportional to temperature gradient.
Narendra said:   1 decade ago
Thermal conductivity is proportional to square root on I/M.
Prabha said:   8 years ago
In solid metals the coducvity decrease as temp rises.
Sidd said:   7 years ago
Explain the correct statement in clear.
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