- Heat Transfer - Section 1
- Heat Transfer - Section 2
- Heat Transfer - Section 3
- Heat Transfer - Section 4
- Heat Transfer - Section 5
- Heat Transfer - Section 6
- Heat Transfer - Section 7
- Heat Transfer - Section 8
- Heat Transfer - Section 9
- Heat Transfer - Section 10
- Heat Transfer - Section 11


Heat Transfer - Engineering
Q1: While the total emissivity of a perfect black body is unity, the same for a real body isA 0
B 1
C > 1
D between 0 and 1
ANS:D - between 0 and 1 The correct answer is: d) between 0 and 1 Total emissivity (�ε) of a real body is a dimensionless quantity that represents the efficiency with which a surface emits thermal radiation compared to a perfect black body at the same temperature. A perfect black body has a total emissivity of 1, meaning it emits thermal radiation as efficiently as possible at a given temperature. For real bodies, total emissivity can range from 0 to 1, where:
|


For help Students Orientation
Mcqs Questions
One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.