Technician A says that the pressure cap can raise the boiling temperature of the coolant. Technician B says that the small valve in the center of the radiator cap is the vacuum valve. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct - the pressure cap increases the boiling point of the coolant. 
Technician B is partially correct - the small valve in the center of the radiator cap regulates pressure (not vacuum).

Technician a Says That the Pressure Cap Can Raise the Boiling