SSC JE Mechanical 9 Oct 2023 Shift 2 Paper

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Question : 193 of 200

Marks: +1, -0

Which of the following statements holds true, according to Kelvin Planck’s statement?

Some amount of heat taken from a source must be rejected to a higher temperature sink.
Perpetual motion machine of the 2nd kind is impossible.
It restricts the engine to have mechanical efficiency lesser than unity.
A heat engine must exchange heat from a single heat reservoir.

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