Which are the two types of decompression?

Which are the two types of decompression?

• A. Explosive decompression and rapid decompression.
• B. Sudden cold decompression and gradual warming.
• C. Pressure equalization and valve failure.
• D. Thermal decompression and mechanical decompression.

Answer: (A)

Two types of decompression are explosive decompression and rapid decompression. Explosive decompression occurs when a structural failure causes an almost instantaneous drop in cabin pressure—air rushes in at high speed, the temperature plummets, and the decompression feels and sounds violent. Rapid decompression, on the other hand, is a sudden loss of pressure due to a breach or system failure that is fast but not explosive in nature—the pressure falls quickly, but without the abrupt, blast-like event of explosive decompression. The other options don’t reflect recognized aviation terminology for decompression: they mix concepts that aren’t used as standard categories, such as cold or warming, pressure equalization with valve failure, or thermal/mechanical decompression.

Two types of decompression are explosive decompression and rapid decompression. Explosive decompression occurs when a structural failure causes an almost instantaneous drop in cabin pressure—air rushes in at high speed, the temperature plummets, and the decompression feels and sounds violent. Rapid decompression, on the other hand, is a sudden loss of pressure due to a breach or system failure that is fast but not explosive in nature—the pressure falls quickly, but without the abrupt, blast-like event of explosive decompression. The other options don’t reflect recognized aviation terminology for decompression: they mix concepts that aren’t used as standard categories, such as cold or warming, pressure equalization with valve failure, or thermal/mechanical decompression.