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ISRO 2018 Heat Transfer Booster Quiz 3
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Question 1
A hollow sphere is constructed of aluminum, k= 200 W/m-k with an inner diameter of 5 cm and an outer diameter of 10 cm. The inside temperature is 200 °C and the outer temperature is 100 °C. Calculate the heat transfer.
Question 2
Air ay 25 °C blows over a hot plate of 50 * 60 cm made of carbon steel maintained at 225 °C. the convective heat transfer coefficient is 30 W/m2k. what will be the heat loss from the plane?
Question 3
A cylindrical pin fin of diameter 5 cm and length 20 cm with negligible heat loss from the tip has an efficiency of 0.5. The effectiveness of this fin is _____.
Question 4
The denominator of the Nusselt number involves the thermal conductivity of the
Question 5
For a linear elastic structural system, minimization of potential energy yields
Question 6
For calculation of heat transfer by natural convection from a horizontal cylinder, what is the characteristic length in grashof number?
Question 7
For a transparent material, which of the following property is not equals to zero?
Question 8
Heat transfer taking place in which direction if a hollow cylinder is maintained at uniform but different temperatures on its inner and outer surfaces?
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