The leakage rate for a triple combination vehicle with air brakes should be no more than __ in one minute during a static leakage test.
Answers
8 psi
5 psi
3 psi
The Correct Answer and Explanation is :
The correct answer is 5 psi.
When performing a static leakage test on a triple combination vehicle equipped with air brakes, the leakage rate should not exceed 5 psi within one minute. This standard ensures that the air brake system maintains sufficient pressure for safe operation.
Understanding Static Leakage Tests:
A static leakage test evaluates the air brake system’s ability to retain pressure when the vehicle is stationary and the brakes are not engaged. This test is crucial for identifying potential leaks that could compromise braking performance.
Procedure:
- Preparation: Fully charge the air brake system by starting the engine and allowing it to build up air pressure.
- Engine Shutdown: Turn off the engine to prevent the compressor from adding air during the test.
- Observation: Monitor the air pressure gauge for one minute.
- Assessment: If the pressure drops by more than 5 psi during this period, it indicates a leak.
Significance:
Maintaining a leakage rate of no more than 5 psi per minute is vital for several reasons:
- Safety: Excessive leakage can lead to insufficient braking power, increasing the risk of accidents.
- Regulatory Compliance: Adhering to this standard ensures compliance with safety regulations governing commercial vehicles.
- Operational Efficiency: A well-maintained air brake system enhances vehicle performance and reduces maintenance costs.
Conclusion:
Regular static leakage tests are essential for ensuring the safety and reliability of triple combination vehicles with air brakes. By ensuring that the leakage rate does not exceed 5 psi in one minute, operators can maintain optimal braking performance and comply with safety standards.