A maintenance supervisor is designing a test to evaluate the effect of radiator cap pressure on engine cooling systems. He uses three identical engines but fits each with radiator caps rated at 0.7 bar, 1.0 bar, and 1.3 bar, respectively. Which system will allow the coolant to reach the highest temperature before boiling?
System with the 1.3 bar radiator cap installed
A radiator cap seals the cooling system and holds the coolant under pressure, and its rating is the pressure at which the relief valve opens.
Raising the pressure on a liquid raises its boiling point, so a higher-rated cap lets the coolant reach a higher temperature before it boils.
Comparing the caps rated 0.7 bar, 1.0 bar and 1.3 bar, the 1.3 bar cap holds the greatest pressure and therefore permits the highest coolant temperature before boiling.
The 0.7 bar and 1.0 bar caps allow boiling at lower temperatures, and the systems do not boil at the same temperature because their cap ratings differ.
Hence, the answer is System with the 1.3 bar radiator cap installed.
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Which component acts as the drive device in the automobile air conditioning system?
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