MCQs
Heat Radiation, Thermal Properties Of Matter, Dual Nature Of Matter
Total Questions : 247
| Page 7 of 25 pages
Question 61. A polished metal pipe 5 cm outside diameter and 370 K temperature at the outer surface is exposed to ambient conditions at 295 K temperature. The emissivity of the surface is 0.2 and the convection coefficient of heat transfer is 11.35 W/m² degree. Calculate the overall coefficient of heat transfer by the combined mode of convection and radiation
Answer: Option C. -> 13.04 W/m² degree
Answer: (c).13.04 W/m² degree
Answer: (c).13.04 W/m² degree
Answer: Option A. -> Fraction of total energy transmitted by the body
Answer: (a).Fraction of total energy transmitted by the body
Answer: (a).Fraction of total energy transmitted by the body
Answer: Option C. -> Transparent body
Answer: (c).Transparent body
Answer: (c).Transparent body
Answer: Option D. -> Wavelength
Answer: (d).Wavelength
Answer: (d).Wavelength
Answer: Option B. -> 145.47 W/m²
Answer: (b).145.47 W/m²
Answer: (b).145.47 W/m²
Answer: Option D. -> Polished aluminum
Answer: (d).Polished aluminum
Answer: (d).Polished aluminum
Answer: Option D. -> 0.28
Answer: (d).0.28
Answer: (d).0.28
Answer: Option B. -> 0.46
Answer: (b).0.46
Answer: (b).0.46
Answer: Option A. -> 0.37
Answer: (a).0.37
Answer: (a).0.37
Answer: Option A. -> 0.90
Answer: (a).0.90
Answer: (a).0.90
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