Mechanical Engineering Mcqs


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  • H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?
  • Large scale drying of sugar is done in a _______________ dryer?
  • With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop___________________?
  • A natural draft cooling tower is filled with wooden grids, which covers about _________________ percent of the tower height?
  • The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________?

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