What does Technician B claim about anti-freeze?

The statement that anti-freeze lowers the freezing point and raises the boiling point is accurate because of the properties of the chemicals used in anti-freeze solutions, typically ether-based compounds like ethylene glycol or propylene glycol.

When added to water, these substances create a solution that can withstand much colder temperatures without freezing, which is essential in areas prone to low temperatures. This property, known as freezing point depression, allows the engine cooling system to function effectively in winter conditions.

On the other hand, these anti-freeze solutions also raise the boiling point of the liquid in the cooling system, known as boiling point elevation. This allows the engine to operate at higher temperatures without the coolant boiling over, which is critical for efficient engine performance and preventing overheating.

The combination of these two effects enables the cooling system to function properly across a much wider range of temperatures, providing protection against freezing in winter and boiling in summer.