Quenching describes the mixing of gases by pressing them into a thin area.

• A. True
• B. False
• C. Heating
• D. Cooling rapidly

Answer: (A)

Quenching in gas handling is about forcing gas streams through a very narrow passage. That tight geometry makes the streams collide and shear against the walls, creating turbulence and a larger contact area in a short distance. This quickly promotes mixing, so describing quenching as mixing gases by pressing them into a thin area fits the practical idea of how constricted spaces help gases homogenize fast. In other contexts, quenching often means rapid cooling (especially in metal processing), but for gas mixing the emphasis is on rapid intermingling due to the narrow gap.