Air Brake (Q Endorsement) Practice · Question
What would a rapid cycling (on and off) of the low air pressure warning light and buzzer typically signify?
A rapid cycling of the low air pressure warning light and buzzer suggests that the air pressure is fluctuating around the threshold of 414 kPa (60 psi), likely
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Question: What would a rapid cycling (on and off) of the low air pressure warning light and buzzer typically signify?
Answer options: ✅ An intermittent air leak that is fluctuating around the warning pressure threshold.
- A perfectly functioning air compressor that is rapidly building pressure.
- The vehicle's electrical system has a short circuit.
- The brake pedal is being continuously pressed.
Correct answer: An intermittent air leak that is fluctuating around the warning pressure threshold.
Explanation: A rapid cycling of the low air pressure warning light and buzzer suggests that the air pressure is fluctuating around the threshold of 414 kPa (60 psi), likely due to an intermittent or slowly worsening air leak that the compressor struggles to keep up with.
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