📊 Dynamics of Machines
Q. For a 4 cylinder engine, when the pressure inside the cylinders exceeds the atmospheric pressure then.
  • (A) work is done by the gases
  • (B) work is done on the gases
  • (C) work is done on the piston wall
  • (D) work is done by the piston wall
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✅ Correct Answer: (A) work is done by the gases

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