How is the heat produced by your vehicle's brakes dissipated?
- By constant light braking
- By coasting in neutral
- With brake air conditioning
- Into the atmosphere ✓
Answer: D. Into the atmosphere
Brake heat is dissipated into the atmosphere.
Why this is the answer
The handbook explains that friction between the linings and the drum, or the pads and the rotor, turns the vehicle's motion into heat. That heat is absorbed by the brake parts and then dissipated into the atmosphere, mostly through the brake drums or rotors. So the heat leaves the braking system by being released into the surrounding air, not by any special cooling feature or by the way you drive.
Why the other answers are wrong
- A. By constant light braking — Constant light braking keeps adding friction heat rather than getting rid of it, so it does not dissipate heat.
- B. By coasting in neutral — Coasting in neutral is not a way of removing heat from the brakes, and the passage says nothing about it cooling them.
- C. With brake air conditioning — The handbook describes no such thing as brake air conditioning; heat leaves through the drums and rotors into the air.
Remember it
Think of the drum or rotor as a hot skillet: the heat it picks up while stopping leaves through the air around it.