ISRO Mechanical & Aerospace 2015 - Question 55

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Topic: Thermodynamics

A process in which no heat is supplied or rejected from the system and entropy is not constant is known as

  • A. Isothermal
  • B. Isentropic
  • C. Polytropic
  • D. Hyperbolic

Answer: C. Polytropic

Explanation: According to the provided solution, if no heat is supplied or rejected and entropy is constant, the process is isentropic. However, if no heat is supplied or rejected and entropy is *not* constant, the provided reference explicitly classifies this as a polytropic process.

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