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Heavy Duty Equipment Technician Red Seal Exam Prep · Question

How does the radiator pressure cap contribute to the efficiency of the cooling system?

By pressurizing the cooling system, the radiator cap raises the boiling point of the coolant, allowing the engine to operate at higher temperatures without the

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Question: How does the radiator pressure cap contribute to the efficiency of the cooling system?

Answer options: ✅ It increases the boiling point of the coolant

  • It filters contaminants from the coolant
  • It regulates the flow of coolant through the engine
  • It detects low coolant levels

Correct answer: It increases the boiling point of the coolant

Explanation: By pressurizing the cooling system, the radiator cap raises the boiling point of the coolant, allowing the engine to operate at higher temperatures without the coolant boiling over, thus improving heat transfer efficiency.

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