Type III air lock is used for p-ways (TP->TP).

Type III air lock is used for p-ways (TP->TP).

• A. Type I
• B. Type II
• C. Type III
• D. Type IV

Answer: (C)

A camera for the main idea here is that air locks are chosen by how they connect spaces and control atmosphere during movement. When you need to move between two passageways (two TP spaces), you want an air lock that can sit right between those two p-ways and provide a controlled boundary as you pass through. Type III air lock is designed for exactly that: a short transit chamber with two interlocking doors that links two p-ways, allowing purge and repressurization so the atmosphere on either side isn’t compromised. This setup keeps the two passageways isolated from each other during entry and exit, which is essential for maintaining the desired conditions in both spaces. The other air lock types serve different configurations or access needs and aren’t optimized for bridging two p-ways, so they aren’t the best fit for TP to TP movement.

A camera for the main idea here is that air locks are chosen by how they connect spaces and control atmosphere during movement. When you need to move between two passageways (two TP spaces), you want an air lock that can sit right between those two p-ways and provide a controlled boundary as you pass through. Type III air lock is designed for exactly that: a short transit chamber with two interlocking doors that links two p-ways, allowing purge and repressurization so the atmosphere on either side isn’t compromised. This setup keeps the two passageways isolated from each other during entry and exit, which is essential for maintaining the desired conditions in both spaces. The other air lock types serve different configurations or access needs and aren’t optimized for bridging two p-ways, so they aren’t the best fit for TP to TP movement.