Q. For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is

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Q. A graph between __________ is called Wilson plot.

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Q. What is the geometric mean of two heat transfer areas A1 and A2 ?

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Q. Hot water (0.01 m³ /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately

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Q. In a heat exchanger, floating head is provided to

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Q. Leidenfrost point is a term concerned with the

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Q. A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

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Q. Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is

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Q. Kirchoff s law applies to __________ radiation.

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Q. With the increase of temperature, the Col-burn jH factor

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Q. In case of evaporators, liquid entrainment results primarily due to

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Q. Baffles in the shell side of a shell and tube heat exchanger

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Q. Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is

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Q. The unit of heat transfer co-efficient in SI unit is

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Q. The number of kg vaporised per kg of steam fed to the evaporator is defined as

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Q. Pick out the wrong statement.

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Q. Economy of a multiple effect evaporator is not influenced much by the

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Q. Increasing the liquor level in the evaporator results in the

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Q. Pick out the wrong statement.

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Q. Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.

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