Answer :
Final answer:
For an air brake system in good condition, the air compressor should start pumping at about 80 PSI to maintain optimal pressure for safe and effective operation. So, the correct option is B.
Explanation:
The question revolves around the proper maintenance and operation of an air brake system, particularly focusing on the point at which the air compressor should start pumping. For an air brake system to function efficiently and safely, it's critical that the air compressor activates at the correct pressure. This pressure is crucial for maintaining the proper air levels within the system to ensure it has enough force to safely bring a vehicle to a stop. The correct answer to the question is b) 80 PSI. This indicates that the air compressor should start pumping at about 80 Pounds per Square Inch (PSI). Starting the compressor at this pressure ensures that the air brake system maintains optimal pressure to operate safely and effectively.
