Question

Given below are two statements:
Statement (I): The heat transfer coefficient for air in free convection varies between 5 to 30 W/m²·K.
Statement (II): The heat transfer coefficient of steam during condensation lies between 5000 to 110000 W/m²·K.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

The heat transfer coefficient for air in free convection is much lower compared to steam during condensation which has a significantly higher coefficient

Answer 1

The Correct Option is A

Both Statement I and Statement II are correct. The heat transfer coefficient for air in free convection typically ranges from 5 to 30 W/m².K, while for steam during condensation, it commonly falls between 5000 and 110000 W/m².K.