Multiple choice general knowledge science & technology In an air cycle refrigeration system, low temperatures are produced due to: Evaporation of liquid air Throttling of air Expansion of air in turbine None of the above Reveal answer Fill a bubble to check yourself C Correct answer Explanation In an air cycle refrigeration system, low temperatures are produced by the expansion of compressed air through a turbine. As the air expands, it does work on the turbine blades, causing its internal energy and temperature to drop significantly.