What is the CRJ maximum cruise Mach number during flight in RVSM airspace?

What is the CRJ maximum cruise Mach number during flight in RVSM airspace?

• A. 0.80 Mach
• B. 0.83 Mach
• C. 0.85 Mach
• D. 0.88 Mach

Answer: (B)

Maximum certified cruise Mach number dictates how fast you can safely cruise at high altitude. This limit comes from the airplane’s certification and ensures the airframe, engines, and air data systems stay within tested margins and that altitude-keeping remains reliable, which is especially important in RVSM airspace where precise altitude separation is needed. For the CRJ-550, that certified maximum is 0.83 Mach, so you should not exceed 0.83 while cruising in RVSM. A speed of 0.80 Mach is permissible but not the maximum, while speeds like 0.85 or 0.88 Mach would exceed the certified limit and are not allowed.

Maximum certified cruise Mach number dictates how fast you can safely cruise at high altitude. This limit comes from the airplane’s certification and ensures the airframe, engines, and air data systems stay within tested margins and that altitude-keeping remains reliable, which is especially important in RVSM airspace where precise altitude separation is needed. For the CRJ-550, that certified maximum is 0.83 Mach, so you should not exceed 0.83 while cruising in RVSM. A speed of 0.80 Mach is permissible but not the maximum, while speeds like 0.85 or 0.88 Mach would exceed the certified limit and are not allowed.