Mechanical Engineering Mcqs


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  • For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the ________________ is the controlling resistance?
  • For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases ______________ times?
  • Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction ?
  • The minimum energy required to allow a chemical reaction to proceed is termed as the ‘threshold energy ‘. Chemical reactions with low activation energy are ________________?
  • The rate at which a chemical substance reacts is proportional to its____________________?

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