Core (Universal)第 24 / 240 题
What is 'system-dependent' (passive) recovery?
a.Recovery performed only by the manufacturer
b.Recovery that uses a large self-contained machine with its own compressor
c.Recovery that vents part of the charge to speed up the process
d.Recovery that uses the appliance's own compressor or pressure
解析
System-dependent or passive recovery uses the appliance's own compressor or its internal pressure to push refrigerant into a recovery container, and it is generally limited to small appliances. Self-contained (active) recovery uses a separate machine with its own compressor. Passive recovery must never involve venting any part of the charge.
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同考点相关题目
- A technician is recovering R-410A from a high-pressure appliance that normally holds less than 200 pounds, using recovery equipment manufactured after November 15, 1993. To what level must the system be evacuated?
- A technician is disposing of a low-pressure chiller manufactured after November 15, 1993. Which evacuation level generally applies to low-pressure appliances during recovery?
- A technician recovers refrigerant from a household window air conditioner (a small appliance) whose compressor still runs. Recovery equipment made after November 15, 1993 must remove at least what percentage of the charge?
- The EPA program that reviews and lists acceptable substitute refrigerants for specific end uses is called:
- A wholesaler offers a technician a low-GWP refrigerant such as R-1234yf. This refrigerant is an example of:
- A recovery cylinder is being filled with recovered R-404A. To leave room for liquid expansion, the cylinder must never be filled beyond what percent of its capacity?
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