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Gearup-JE'19: Heat Transfer Quiz-4
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Question 1
Above 120 ° which of the following gives maximum heat transfer rate
Question 2
On increasing the heat transfer coefficient then the efficiency and the effectiveness of the fin respectively are
Question 3
A hot body at a temperature of 5000 °C emits radiation at a wavelength of 0.5 μm. A furnace at 500 °C will emit a radiation of wavelength______.
Question 4
As the wave length Increases, the monochromatic emissivity of the grey body
Question 5
Heat is lost from a 150 mm diameter pipe vertically placed in ambient at 30 °C. The height of the cylinder is 200 mm and thermal conductivity of air is 0.04W/mK. If the Nusselt number is 30, then the heat transfer coefficient will be
Question 6
The effect of forced convection can be neglected if
Question 7
In a parallel flow heat exchanger, the inside heat transfer coefficient is 180W/ outside heat transfer coefficient is 250W/. If the fouling factor for both inside and outside wall is 0.003. Then overall heat transfer coefficient for the system will be
Question 8
Arrange in increasing order of thermal conductivity of the following materials
a) Silver
b) Copper
c) Aluminum
d) Steel
a) Silver
b) Copper
c) Aluminum
d) Steel
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