EXAMIANS
What is the steam economy in case of a single effect evaporator system?
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Small scale evaporation is done in a
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The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as
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LMTD for counterflow and prallel flow heat exchanger will be the same, when the
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In a forward feed multiple effect, the pressure build up will be
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The ratio of momentum diffusivity to thermal diffusivity is the __________ number.
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The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness)
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Intermittant tube cleaning is possible to be done in case of a __________ evaporator.
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In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is
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A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is
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