Mechanical Engineering Mcqs


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  • A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by__________________?
  • The use of space time is preferred over the mean residence time in the design of a/an____________________?
  • For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of ?
  • Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually ________________ the concentration of catalyst, if it does not entail a chain mechanism?
  • Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?

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