Question

The coolant to be employed in liquid cooling system should have ______________

(a) low freezing temperature

(b) a high boiling point

(c) a large latent heat of vaporisation

(d) all of the mentioned

The question was posed to me in final exam.

The question is from Liquid Cooling Systems topic in division Heat Rejection and Cooling of IC Engine

Answer 1

The correct answer is:

(d) all of the mentioned

For a coolant to be effective in a liquid cooling system, it should have:

• Low freezing temperature to prevent it from freezing in cold conditions.
• High boiling point to avoid boiling over in high-temperature engine environments.
• Large latent heat of vaporization to absorb a significant amount of heat before changing phase, which improves the system's cooling efficiency.