What is the maximum speed below 8,000 feet?

What is the maximum speed below 8,000 feet?

• A. 325 knots
• B. 290 knots
• C. 0.84 Mach
• D. 235 knots

Answer: (B)

Speed limits at low altitude are stated in indicated airspeed to reflect the actual aerodynamic forces the airplane experiences. Below 8,000 feet, the maximum allowed is 290 knots IAS. This helps ensure safe stall margins near the ground, keeps handling characteristics predictable during approach and departure, and supports noise and flow management around airports. Mach numbers are altitude-dependent, so relying on a Mach limit at low altitude wouldn’t provide the consistent protection intended; it could permit too-fast speeds where the air is denser and control is more critical. The other options either exceed this low-altitude cap, rely on a Mach value that isn’t appropriate for near-ground operations, or are simply more restrictive than the published limit.

Speed limits at low altitude are stated in indicated airspeed to reflect the actual aerodynamic forces the airplane experiences. Below 8,000 feet, the maximum allowed is 290 knots IAS. This helps ensure safe stall margins near the ground, keeps handling characteristics predictable during approach and departure, and supports noise and flow management around airports. Mach numbers are altitude-dependent, so relying on a Mach limit at low altitude wouldn’t provide the consistent protection intended; it could permit too-fast speeds where the air is denser and control is more critical. The other options either exceed this low-altitude cap, rely on a Mach value that isn’t appropriate for near-ground operations, or are simply more restrictive than the published limit.