Physics · Cooling System
What is the function of the vacuum valve in a radiator pressure cap?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1To relieve excess pressure from the system
- 2To allow air or coolant to enter the system as it cools down, preventing vacuum collapse✓
- 3To increase system pressure during expansion
- 4To allow continuous coolant evaporation
Correct answer
To allow air or coolant to enter the system as it cools down, preventing vacuum collapse
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