What is the standard air brake cut-out pressure?

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Multiple Choice

What is the standard air brake cut-out pressure?

Explanation:
Air brake systems use a governor to control charging. When the system pressure reaches the cut-out setting, the governor stops the compressor so no more air is pumped in, keeping the pressure within a safe, usable range. This cut-out is typically at 120 psi, which is the point where the brakes release and the system stops building pressure. As the brakes are used and pressure drops, the pressure falls to the cut-in range (often around 85–100 psi), and the compressor starts again to refill the reservoirs. So, the standard cut-out pressure you’ll encounter is 120 psi.

Air brake systems use a governor to control charging. When the system pressure reaches the cut-out setting, the governor stops the compressor so no more air is pumped in, keeping the pressure within a safe, usable range. This cut-out is typically at 120 psi, which is the point where the brakes release and the system stops building pressure. As the brakes are used and pressure drops, the pressure falls to the cut-in range (often around 85–100 psi), and the compressor starts again to refill the reservoirs. So, the standard cut-out pressure you’ll encounter is 120 psi.

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