Chemical Engineering :: Heat Transfer
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Reason for operating an evaporator in multiple effect is to secure
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In a cooling tower, water becomes cool by
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In Fourier's law, the proportionality constant is called the
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The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.
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Pick out the wrong statement.
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Pick out the wrong statement.
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Prandtl number is the reciprocal of
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A.
Bubble size increases with the dynamic viscosity of the liquid in case of nucleate pool boiling.
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B.
Thermal conductivity of a dry material is more than that of the damp material.
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C.
Ratio of its capacity to economy equals the steam consumption in kg/hr in an evaporator.
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D.
Vaporisation of organic substances in evaporator mostly causes foam formation.
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A.
The value of hydrostatic head increases with increase in vacuum in the effect in a multiple effect evaporator system.
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B.
Entering velocity of the liquid in the tubes of natural circulation evaporators is in the range of 0.3 to 0.9 metre/second.
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C.
Duhring's plot is used for calculating the concentration of solution.
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D.
In a multiple effect evaporation system, the number of effects is limited by the total boiling point rise.
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