According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a
A) grey body
B) brilliant white polished body
C) red hot body
D) black body
E) none of the above.
Correct Answer:
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Q3: In counter flow heat exchangers
A)both the fluids
Q4: A steam pipe is to be insulated
Q5: Fourier's law of heat conduction is valid
Q6: According of Kirchhoff's law,
A)radiant heat is proportional
Q7: All radiations in a black body are
A)reflected
B)refracted
C)transmitted
D)absorbed
E)partly
Q9: The concept of overall coefficient of heat
Q10: Joule sec is the unit of
A)universal gas
Q11: The value of Prandtl number for air
Q12: The value of the wavelength for maximum
Q13: Log mean temperature difference in case of
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