Q. jH factor for heat transfer depends upon the __________ number.

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Q. Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer.

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Q. The thermal boundary layer at NPr > 1

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Q. In the free convection regime of pool boiling, the heat flux is proportional to

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Q. With increase in temperature, the thermal conductivity of fresh lubricating oil

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Q. Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is

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Q. Kg of liquid evaporated per hour in an evaporator is defined as its

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Q. Pick out the correct statement.

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Q. Open pan evaporators are preferred to be used, when the solution to be concentrated is

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Q. The maximum heat transfer co-efficient from steam heating will be attained when the steam is

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Q. Mode of heat transfer involved in the cooling of air cooled internal combustion engine is

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Q. Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that

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Q. The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is

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Q. In a shell and tube heat exchanger, the shell side fluid velocity can not be changed by changing the

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Q. To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is

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Q. In a gas-liquid shell and tube heat exchanger, the

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Q. Which is the most suitable for the concentration of foamy & frothy liquors ?

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Q. Boiling point elevation of an ideal solution

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Q. The rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the

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Q. Which of the following has the lowest overall heat transfer co-efficient ?

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