New Jersey Air Brakes Practice Test 2026 – The All-in-One Guide to Master Your Exam Success!

Question: 1 / 400

How quickly should air pressure build from 85 to 100 psi in a properly functioning dual air brake system with minimum size tanks?

30 seconds

45 seconds

In a properly functioning dual air brake system with minimum size tanks, the expectation for air pressure to build from 85 psi to 100 psi is generally around 45 seconds. This timeframe ensures that the air compressor is effectively supplying air and that the system is operating efficiently, which is essential for the safety and reliability of the braking system.

The significance of achieving this pressure build-up time lies in ensuring that the air brakes have adequate pressure to engage effectively. If the pressure does not reach the required levels within this time frame, it could indicate potential issues with the air compressor, leaks in the system, or other malfunctions that could compromise braking performance. Therefore, the standard of 45 seconds acts as both a performance benchmark and a safety guideline in maintaining the integrity of the air brake system.

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60 seconds

75 seconds

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