Minimum governor cut-out pressure is

1. 105 psi. ✓
2. 85 psi.
3. 95 psi.
4. 125 psi.

Answer: A. 105 psi.

The minimum governor cut-out pressure is 105 psi.

Why this is the answer

The handbook says the governor unloads the compressor when air pressure reaches its cut-out setting. It also says maximum pressure on different vehicles may vary between 105 and 135 psi, so the lowest cut-out pressure in that range is 105 psi. The example of 125 psi cut-out and 105 psi restart point shows the usual pattern, but the minimum cut-out itself is the low end of the stated maximum-pressure range.

Why the other answers are wrong

• B. 85 psi. — The handbook ties 80 to 85 psi to the pressure at which the governor must restart the compressor, not to the minimum cut-out pressure.
• C. 95 psi. — No passage gives 95 psi as a governor cut-out setting, so it is not supported as the minimum.
• D. 125 psi. — The handbook gives about 125 psi as a usual cut-out setting, but it also says maximum pressure can be as low as 105 psi, so 125 psi is not the minimum.

Remember it

Cut-out is when the compressor stops; the minimum cut-out is the lowest top-end setting, not the restart point.