Recovery Equipment & Techniques Flashcards
7 cards from real CFC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Recovery Equipment & Techniques flashcards as text
Which condition MUST be met before transferring recovered refrigerant from a recovery cylinder to a reclaim facility?
Answer: The cylinder must be labeled with the refrigerant type and any known contaminants
Recovered refrigerant cylinders must be properly labeled with the refrigerant type and contaminant status before sending to a reclaim facility.
What does the term 'critical charge' mean in the context of refrigerant recovery from small appliances?
Answer: The minimum charge needed for the system to function
Critical charge is the minimum amount of refrigerant required for a system to operate at its rated capacity.
A technician is recovering R-22 from a system and notices the recovery machine discharge pressure is extremely high. The SAFEST immediate action is to:
Answer: Stop recovery, check for a full cylinder or blocked discharge line, and address the cause
Extremely high discharge pressure indicates a potentially dangerous condition such as a full cylinder or blockage, and recovery must stop until the cause is resolved.
Under EPA regulations, recovery equipment manufactured after November 15, 1993 must be certified by an EPA-approved equipment testing organization. Which organization is recognized for this certification?
Answer: ARI (now AHRI)
ARI (Air-Conditioning and Refrigeration Institute, now AHRI) is the EPA-recognized organization for certifying refrigerant recovery equipment.
When using a system-dependent recovery method on a small appliance, what is required if the appliance compressor is not operational?
Answer: A recovery machine must be used instead of the system compressor
If the system compressor cannot be used for passive recovery, a self-contained (active) recovery machine must be used instead.
What is the function of the high-pressure cut-out switch on a recovery machine?
Answer: It protects the recovery machine compressor from damage due to excessive discharge pressure
The high-pressure cut-out switch shuts down the recovery machine compressor when discharge pressure exceeds a safe limit, preventing compressor damage.
After completing refrigerant recovery, EPA rules require the technician to verify recovery is complete by:
Answer: Checking that system pressure has stabilized at or below the required vacuum level
EPA verification requires confirming that system pressure has reached and remains at or below the required vacuum level for the specific system size.