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Doctors Medicines MCQs Q&A

  1. All processes are both internally as well as externally reversible.
  2. Intake and exhaust processes are constant volume heat rejection processes.
  3. The combustion process is a constant volume heat addition process.
  4. The working fluid is an ideal gas with constant specific heats.
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Option 2 : Intake and exhaust processes are constant volume heat rejection processes.

Explanation:

Air-standard cycle, which is based on the following assumptions:

(i) The working medium is assumed to be a perfect gas and follows the relation PV = mRT or p = ρRT.

(ii) There is no change in the mass of the working medium.

(iii) All the processes that constitute the cycle are reversible.

(iv) Heat is assumed to be supplied from a constant high-temperature source and not from chemical reactions during the cycle.

(v) The working medium has constant specific heats throughout the cycle.

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