In sub-cooled boiling,

Related MCQs

• Boiling point elevation for a strong and concentrated solution is found by Duhring's rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.
• In case of __________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface.
• Boiling of milk in an open vessel is an example of __________ boiling.
• It is desired to concentrate a 20% salt solution (20 kg of salt in 100 kg of solution) to a 30% salt solution in an evaporator. Consider a feed of 300 kg/min at 30°C. The boiling point of the solution is 110°C, the latent heat of vaporisation is 2100 kJ/kg and the specific heat of the solution is 4 kJ/kg.K. The rate at which the heat has to be supplied in (kJ/min) to the evaporator is
• Nucleate boiling is promoted
• Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
• Boiling point of a solution according to Duhring's rule is a linear function of the __________ of water.
• In the free convection regime of pool boiling, the heat flux is proportional to
• When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling.
• In a multiple effect evaporator, the effect of boiling point elevation is to