Question 174Refrigeration & AC - 1st Asst/Chief
70% to passA refrigeration unit will tend to short-cycle when operating under what conditions?
Alack of refrigerant
Bduring starting conditions
Cunder heavy loads
Dduring hot gas defrost
AI Explanation
The correct answer is A) lack of refrigerant. When a refrigeration unit is low on refrigerant, it will tend to short-cycle, meaning it will turn on and off more frequently than normal. This is because the lack of refrigerant reduces the system's ability to absorb heat, causing the compressor to cycle on and off more often to maintain the desired temperature. The other answer choices are incorrect because they do not directly lead to short-cycling. Starting conditions (B) and heavy loads (C) may affect the system's performance, but do not necessarily cause short-cycling. Hot gas defrost (D) is a specific defrosting method and does not directly relate to short-cycling.
Related Questions
Q188:Of the various possible methods shown in the illustration, which is the correct ... Q12:An arrow stamped on the valve body of a water regulating valve indicates which o... Q69:The air temperature associated with a direct reciprocating air conditioning plan... Q66:When pumping down an air conditioning system to test the low-pressure cutout swi... Q58:When recovering R-12 from a small appliance with a working compressor, using a r...
Ready to test your knowledge?
Take a Refrigeration & AC - 1st Asst/Chief Practice ExamOfficial Resources