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On this steep downhill section, I should moderate my speed by using:
AMainly the engine through the gearbox.Correct
BOnly the service brake.
CThe engine and the parking brake.
Explanation
On steep descents, using the engine through the gearbox, commonly known as engine braking, is fundamental for safely controlling the vehicle's speed. This practice prevents overheating and the consequent loss of effectiveness of the service brakes. The exclusive use of the service brake can cause fatigue in the braking system due to the extreme heat generated by continuous friction. The parking brake is only intended to immobilize the vehicle when it is stopped and should not be used to moderate speed while driving.
Explanation generated by artificial intelligence and may contain errors. Always confirm the information with your instructor.
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