Q. The handle of a saucepan, 30 cm long and 2 cm in diameter, is subjected to 100 degree Celsius temperature during a certain cooking operation. The average unit surface conductance over the handle surface is 7.35 W/m² degree in the kitchen air at 24 degree Celsius. The cook is likely to grasp the last 10 cm of the handle and hence the temperature in this region should not exceed 38 degree Celsius. What should be the thermal conductivity of the handle material to accomplish it? The handle may be treated as a fin insulated at the tip

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Q. Let us assume a square section fin split longitudinally and used as two fins. This will result in

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Q. Mark the false statement regarding effectiveness of fin

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Q. The convective coefficient in boilers and condenser is

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Q. In thermometer heat is dissipated from which end?

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Q. The thermometric well is treated as a fin of

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Q. Thermometric well apparatus doesn’t consists of

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Q. For what purpose we use thermometric well?

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Q. In thermometric well, the error can be minimized by

(i) The value of parameter ml slows down by some quantity.

(ii) Lagging of the tube so that conduction of heat along its length is arrested

Identify the correct option

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Q. Suppose there are two reservoirs A and B. Let TA and TB be the temperatures of respective reservoirs. At any instant say TA = TB. In this case maximum temperature occurs at

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Q. The relevant boundary conditions in case of heat transfer from a bar connected to two heat sources at different temperatures are

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Q. “The tube that is used in thermometric well is considered as a hollow fin and the temperature distribution is obtained by using the relation applicable to infinitely long fin”. Choose the correct option

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Q. “The diameter of well does not have any effect on temperature measurement by the thermometer”. Choose the correct option

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Q. Which fin yields the maximum heat flow per unit weight?

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Q. Heat dissipation by every segment of the fin is

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Q. “If a fin of a constant cross section is used, there would be wastage of material”. Chose the correct option.

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Q. Which one is true regarding parabolic fin?

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Q. For parabolic fin, the curve follows which law?

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Q. The correction length for cylindrical fin is
(Where, d is the diameter)

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Q. Provision of fins on a given heat transfer surface will be more effective if there is

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