A.2 times
B.4 times
C.8 times
D.16 times
Related Mcqs:
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- How much radiant energy will an object emit if its temperature is at absolute zero ?
- A liquid flowing through a tube is turbulent. In which case will the maximum change in heat transfer coefficient occur?
- In calm air the air temperature is -10o C, if the wind speed should increase to 30 knots (with no change in air temperature) the thermometer would indicate __________?
- Four rods with different radii ‘r’ and length ‘l’ are used to connect to reservoirs of heat at different temperature. Which one of them with conduct most heat?
- A dimensionless heat transfer coefficient which gives a measure of the ratio of the heat transfer rate to the rate at which heat would be conducted within the fluid under a temperature gradient is known as
- The ratio of heat transfer coefficient to the flow of heat per unit temperature rise due to the velocity of the fluid is known as
- A wall 50 mm thick (thermal conductivity k = 40 W/m?C) has temperature difference on two surfaces of 100?C. What could probably change if the temperature difference of this wall drops to 100?C
