In the aqua-ammonia absorption system, / » Thermal Engineering 2 solved MCQs / By admin Question: In the aqua-ammonia absorption system, A. water is the refrigerant and ammonia is the absorbent B. ammonia is the refrigerant and water is the absorbent C. both ammonia and water can be used as refrigerant or absorbent D. none of the mentioned Answer» b. ammonia is the refrigerant and water is the absorbent Note: The above multiple-choice question is for all general and Competitive Exams in India.