Where is the latent heat obtained to create vapor from the feed water in the illustrated distiller? Illustration MO-0111

Correct Answer: Option C — From having passed through "23".

The distiller utilizes a heat exchanger, labeled 23, to preheat incoming feed water using waste heat from the engine cooling system or auxiliary steam. This process provides the necessary latent heat to initiate vaporization within the vacuum chamber, ensuring efficient operation and minimizing the external energy required for distillation.