Final Answer:
The pressure should build from 85 to 100 P.S.I. within approximately three minutes in a properly functioning dual air brake system with minimum size air tanks.
Step-by-step explanation:
In a well-functioning dual air brake system with minimum size air tanks, the pressure build-up occurs within a specific timeframe. Typically, when the system is initially charged, the pressure rises from 85 to 100 pounds per square inch (P.S.I.). This process typically takes around three minutes to complete.
This rapid increase in pressure is crucial for ensuring the effectiveness of the air brake system. As the compressor operates and pushes air into the system, it gradually elevates the pressure to the desired range. The time taken for this build-up may slightly vary depending on the specific vehicle's system and environmental factors.
Maintaining proper air pressure within the brake system is critical for safe vehicle operation. Adequate pressure ensures that the brakes function optimally, allowing the driver to control the vehicle's speed and stop when necessary. Regulatory standards often require a minimum pressure level to ensure the brakes are reliable in emergency situations, making it vital for the system to reach and maintain the specified pressure range within the expected timeframe.
Regular inspections and maintenance of the air brake system are essential to ensure it operates within the prescribed parameters, maintaining safety and efficiency on the road. Therefore, monitoring the pressure build-up time is a key aspect of ensuring the proper functioning of the air brake system.