Heat Transfer Questions

Q.  Heat transfer by radiation mainly depends upon___________________?

a. its temperature
b. nature of the body
c. kind and extent of its surface
d. all of the above
e. none of the above


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  According to Kirchoff’s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a _________________?
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MCQs:  All radiations in a black body are___________________?
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MCQs:  The unit of overall coefficient of heat transfer is___________________?
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MCQs:  The value of the wavelength for maximum emissive power is given by ___________________?
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MCQs:  Total emissivity of polished silver compared to black body is___________________?
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MCQs:  The value of Prandtl number for air is about _______________________?
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MCQs:  The energy distribution of an ideal reflector at higher temperatures is largely in the range of ___________________?
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MCQs:  Which of the following property of air does not increase with rise in temperature ________________?
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MCQs:  In free con-vection heat transfer, Nusselt number is function of________________?
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MCQs:  According to Stefan-Boltzmann law, ideal radiators emit radiant energy at a rate proportional to___________________?
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MCQs:  Log mean temperature difference in case of counter flow compared to parallel flow will be________________?
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MCQs:  The unit of Stefan Boltzmann constant is ____________________?
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MCQs:  Stefan Boltzmann law is applicable for heat transfer by __________________?
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MCQs:  Thermal diffusivity of a substance is __________________?
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MCQs:  The thermal diffusivities for gases are generally_____________________?
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MCQs:  A grey body is one whose absorptivity _________________?
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MCQs:  Planck’s law holds good for________________?
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MCQs:  A perfect black body is one which_______________?
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MCQs:  If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of___________________?
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MCQs:  In regenerator type heat exchanger, heat transfer takes place by___________________?
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