Which speed is the lowest among the listed flap configuration limits?

• A. 230 kts
• B. 180 kts
• C. 195 kts
• D. 250 kts

Answer: (B)

Flap configuration limits are the maximum airspeeds allowed for each flap setting, essentially the Vfe for that position. The safe operating envelope with flaps depends on sticking to the lowest of these limits, because that is the most restrictive setting you might inadvertently be using.

In this list, 180 knots is the smallest number, so it represents the lowest flap-configuration limit. The other speeds—230, 195, and 250 knots—are higher, meaning those flap positions allow faster operation before reaching their own limits. Therefore, the lowest flap-configuration limit among the options is 180 knots.