What is the VMO from 10,000 ft to Mach transition?

What is the VMO from 10,000 ft to Mach transition?

• A. 300
• B. 320
• C. 340
• D. 360

Answer: (B)

VMO is the maximum operating speed in knots indicated that applies up to the point you switch from flying by IAS to Mach (the Mach transition). For the ERJ 175, the published limit from 10,000 feet up to where Mach becomes the controlling factor is 320 knots indicated. That means in this altitude range you’re constrained to 320 KIAS rather than any Mach number, and only above the Mach transition altitude does the limit switch to MMO (Mach number). The other numbers would either be higher than the published VMO for this segment or lower than it, so they aren’t the correct limit.

VMO is the maximum operating speed in knots indicated that applies up to the point you switch from flying by IAS to Mach (the Mach transition). For the ERJ 175, the published limit from 10,000 feet up to where Mach becomes the controlling factor is 320 knots indicated. That means in this altitude range you’re constrained to 320 KIAS rather than any Mach number, and only above the Mach transition altitude does the limit switch to MMO (Mach number). The other numbers would either be higher than the published VMO for this segment or lower than it, so they aren’t the correct limit.