Project ForgeThermodynamics
First Law of Thermodynamics
GATE 2021
Easy
In which of the following pairs of cycles do both cycles have at least one isothermal process?
- ADiesel cycle and Otto cycle
- Carnot cycle and Stirling cycle
- CBrayton cycle and Rankine cycle
- DBell-Coleman cycle and Vapour compression refrigeration cycle
Explanation
The Carnot cycle has two isothermal processes (heat addition and rejection) by definition. The Stirling cycle also has two isothermal processes (plus two constant-volume regenerative processes). None of Diesel, Otto, Brayton, Rankine, Bell-Coleman, or VCC cycles have an isothermal process.
Source: GATE ME 2021 Session 1 (ME-1) (2021)
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