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Mechanical Engineering Mcqs — Test 14

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Question 1
All radiations in a black body are___________________?
Question 2
The unit of overall coefficient of heat transfer is___________________?
Question 3
The value of the wavelength for maximum emissive power is given by ___________________?
Question 4
Total emissivity of polished silver compared to black body is___________________?
Question 5
The value of Prandtl number for air is about _______________________?
Question 6
The energy distribution of an ideal reflector at higher temperatures is largely in the range of ___________________?
Question 7
Which of the following property of air does not increase with rise in temperature ________________?
Question 8
In free con-vection heat transfer, Nusselt number is function of________________?
Question 9
According to Stefan-Boltzmann law, ideal radiators emit radiant energy at a rate proportional to___________________?
Question 10
Log mean temperature difference in case of counter flow compared to parallel flow will be________________?