Maintenance Technician 2026 Complete Practice Test

Question: 1 / 400

What does it mean to ‘bleed’ a radiator?

To check for leaks

To release trapped air from the system to improve heating efficiency

Bleeding a radiator refers to the process of releasing trapped air from the heating system, which is crucial for maintaining heating efficiency. When air gets trapped in a radiator, it can prevent water from filling the radiator properly, leading to cold spots where heating is less effective. This trapped air can reduce the overall effectiveness of the heating system, making it work harder and use more energy to heat the space.

The purpose of bleeding is to allow the trapped air to escape, usually through a valve at the top of the radiator. When this air is released, it creates space for the hot water to circulate fully within the radiator, ensuring that the entire unit can operate at optimal performance levels. By taking this action, you can improve comfort levels in the space and reduce energy consumption, ultimately leading to a more efficient heating system.

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To refill with water

To clean the interior surfaces

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