Question 143Refrigeration & AC - Assistant Engineer
70% to passIn a refrigeration system, the push-pull technique can be used for the recovery of the refrigerant in what state?
Aliquid only
Bvapor only
Cboth liquid and vapor
Dshould never be used with low-pressure systems
AI Explanation
The correct answer is C) both liquid and vapor. The push-pull technique is used to recover refrigerant from a refrigeration system in both the liquid and vapor states. This method involves pushing the liquid refrigerant from the system using high-pressure nitrogen or air, while simultaneously pulling the vapor refrigerant using a recovery unit. This allows for the efficient and complete removal of the refrigerant from the system, regardless of its physical state. The other options are incorrect because the push-pull technique is applicable for recovering both liquid and vapor refrigerant, not just one state, and it can be used with low-pressure systems as well.
Related Questions
Q62:Which lettered component, shown in the illustration, indicates the location of t... Q151:The amount of HCFC-123 in a storage cylinder is measured by what means? Q226:If a condenser coil of an air-cooled container refrigeration system becomes dirt... Q141:During tests to discover why a refrigeration compressor is running continuously,... Q70:Why are dehydrators usually located in the liquid line of refrigeration systems?...
Ready to test your knowledge?
Take a Refrigeration & AC - Assistant Engineer Practice ExamOfficial Resources