What occurs when SSGTG reaches 12,700 RPM?

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Multiple Choice

What occurs when SSGTG reaches 12,700 RPM?

Explanation:
At this speed, the system has reached the point where the purge/vent path is no longer needed to prevent compressor surge during start. The control closes the vent to trap air and gas, allowing the compressor and turbine to build and maintain pressure for stable operation. If the vent stayed open, pressure would bleed away and acceleration could be hindered, so closing the vent at 12,700 RPM is the correct action.

At this speed, the system has reached the point where the purge/vent path is no longer needed to prevent compressor surge during start. The control closes the vent to trap air and gas, allowing the compressor and turbine to build and maintain pressure for stable operation. If the vent stayed open, pressure would bleed away and acceleration could be hindered, so closing the vent at 12,700 RPM is the correct action.

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