Which term is associated with maintaining cabin pressure during flight?

Which term is associated with maintaining cabin pressure during flight?

• A. PRESSURIZATION
• B. RADAR
• C. RON
• D. PA

Answer: (A)

Pressurization is the term associated with maintaining cabin pressure during flight. At cruising altitude, outside air is too thin to breathe, so the airplane’s environmental control system actively controls the cabin pressure to a comfortable level—usually equivalent to about 6,000–8,000 feet—for passenger and crew safety and comfort. This is done with bleed air and an outflow valve to regulate the cabin’s differential pressure between inside and outside the fuselage. The other terms refer to unrelated systems or concepts: radar is for detecting other aircraft and weather, RON relates to staying overnight (a layover), and PA is the public address system for announcements.

Pressurization is the term associated with maintaining cabin pressure during flight. At cruising altitude, outside air is too thin to breathe, so the airplane’s environmental control system actively controls the cabin pressure to a comfortable level—usually equivalent to about 6,000–8,000 feet—for passenger and crew safety and comfort. This is done with bleed air and an outflow valve to regulate the cabin’s differential pressure between inside and outside the fuselage. The other terms refer to unrelated systems or concepts: radar is for detecting other aircraft and weather, RON relates to staying overnight (a layover), and PA is the public address system for announcements.