General Studies · IC Engines & Gas Power Cycles
An Otto cycle and a Diesel cycle are plotted on a T-s (Temperature-entropy) diagram under the condition of sharing the same maximum pressure and maximum temperature. Which of the following statements correctly describes their processes?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The Diesel cycle has a larger compression ratio than the Otto cycle
- 2The Otto cycle rejects less heat than the Diesel cycle
- 3The heat addition process in the Otto cycle occurs at constant volume (isochoric), while in the Diesel cycle it occurs at constant pressure (isobaric)✓
- 4The efficiency of the Diesel cycle is greater than the Otto cycle for these conditions
Correct answer
The heat addition process in the Otto cycle occurs at constant volume (isochoric), while in the Diesel cycle it occurs at constant pressure (isobaric)
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