Which statement about the inflow valve is true?

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Multiple Choice

Which statement about the inflow valve is true?

Explanation:
In cabin pressurization, the thing that actually sets and maintains cabin pressure is the outflow valve — it meters how much air leaves the cabin. The inflow valve doesn’t regulate pressure; it mainly provides ventilation by admitting outside air when needed. Oxygen flow is handled by the oxygen system, not the inflow valve, and cabin altitude is monitored by sensors with the controller adjusting the outflow valve accordingly. So saying the inflow valve is not a principal controlling component is the correct statement.

In cabin pressurization, the thing that actually sets and maintains cabin pressure is the outflow valve — it meters how much air leaves the cabin. The inflow valve doesn’t regulate pressure; it mainly provides ventilation by admitting outside air when needed. Oxygen flow is handled by the oxygen system, not the inflow valve, and cabin altitude is monitored by sensors with the controller adjusting the outflow valve accordingly. So saying the inflow valve is not a principal controlling component is the correct statement.

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