Question

The circulation of water starts only after the engine has become hot enough to cause thermo-syphon.

(a) True

(b) False

The question was asked by my college professor while I was bunking the class.

I would like to ask this question from Liquid Cooling Systems in portion Heat Rejection and Cooling of IC Engine

Answer 1

The correct answer is:

(a) True

In a thermo-syphon cooling system, the circulation of coolant (water) relies on the temperature difference between the hot engine and the cooler areas of the system. The process starts only once the engine gets hot enough to create a temperature gradient sufficient to drive the natural convection, which in turn circulates the coolant. Until the engine reaches the necessary temperature, the coolant remains stationary.