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Mechanical Engineering

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Engineering subjects
  1. What's new in this club
  2. A perfect gas is one in which molecules interaction remain negligible.and two essential conditions are: 1-pressure should be lower so gases can move independently. 2-Temperature should be high so that kinetic energy of gases can overcome the interaction among molecules.
  3. Well both are energy with same unit Both are inexact differentials and path functions, i.e their properties cannot be determined by their initial and final states Both are boundary phenomenon and are defined by thier process and not state
  4. Topping-cycle systems produce electricity first, then recover the excess thermal energy for heating or cooling applications. By contrast, bottoming-cycle systems, also known as “waste heat to power,” are a process whereby waste heat from an existing process is used to produce electricity.
  5. Which cycle is based on two adiabatic and two constant pressure processes ?
  6. In which cycle heat is added at constant pressure and rejected at constant volume ?
  7. What is the name given to ratio of actual cycle efficiency and ideal cycle efficiency.
  8. Whether entropy is intensive property and extensive property ?
  9. What do you understand by latent heat ? Give four examples of latent heats.
  10. Explain the rule to find specific heat of aqueous solutions.
  11. Heat capacity rate means the ability to store the heat. And specific heat is the amount of heat required to raise the temperature of body by one degree centigrade.
  12. What is the difference between heat capacity and specific heat of a material ?

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