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Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?

A. Freon

B. Liquid sulphur dioxide

C. Methyl chloride

D. Ammonia

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Which of the following diagrams does not represent an Otto cycle?
  2. The extensive properties are
  3. The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called…
  4. Gibbs-Duhem equation
  5. Equation which relates pressure, volume and temperature of a gas is called the
  6. Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.
  7. Third law of thermodynamics is helpful in
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  9. The four properties of a system viz. P, V, T, S are related by __________ equation.
  10. Which of the following is not an intensive property?
  11. For a single component two phase mixture, the number of independent variable properties are
  12. Pick out the correct equation relating 'F' and 'A'.
  13. A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature…
  14. The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmanns…
  15. Dry ice is
  16. The first law of thermodynamics is a restatement of the law of conservation of
  17. Which of the following is a widely used refrigerant in vapour compression refrigeration system (using…
  18. The principle applied in liquefaction of gases is
  19. Out of the following refrigeration cycles, which one has maximum COP?
  20. Degree of freedom of a system consisting of a gaseous mixture of H2 and NH3 will be
  21. A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it…
  22. Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 >…
  23. Requisites of a reversible process is that the
  24. It is desired to bring about a certain change in the state of a system by performing work on the system…
  25. Entropy change for an irreversible isolated system is
  26. A change in state involving a decrease in entropy can be spontaneous, only if
  27. In a reversible process
  28. A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The…
  29. The work done in an adiabatic change in a particular gas depends upon changes in the __________ only.
  30. Normal temperature and pressure (N.T.P.) corresponds to