Q
45. What are spring brakes?
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ABrakes used for parking.
BIf the air brakes leak down, springs press the brakes on to stop the vehicle.
CThe spring on the brake pedal.
Detailed Explanation
The correct answer is "If the air brakes leak down, springs press the brakes on to stop the vehicle.". This is based on federal CDL regulations and safety standards.
Correct Answer: If the air brakes leak down, springs press the brakes on to stop the vehicle.
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