engineering recuitment MPPGCL JE 2024 Mock Test Thermodynamics Second Law of Thermodynamics and Entropy Statements of Second Law of Thermodynamics
Which of the following statements holds true, according to Kelvin Planck’s statement?
1
Some amount of heat taken from a source must be rejected to a higher temperature sink.
2
Perpetual motion machine of the 2nd kind is impossible.
3
It restricts the engine to have mechanical efficiency lesser than unity.
4
A heat engine must exchange heat from a single heat reservoir.