Refrigeration and Air Conditioning System Study Guide
1. Low Charge Indicator in High Pressure Systems with Capillary Tube:
- Answer: Excessive superheat
2. Approved Refrigerant for New Household Appliances:
- Answer: R-600a
3. EPA SNAP Approved "Drop-In" Replacement for R-22:
- Answer: There are no direct drop-in refrigerant substitutes
4. Component that Reduces Flammability in HFO Refrigerants:
,- Answer: Fluorine
5. Process Returning Refrigerant to New Specifications (AHRI-700 Standards):
- Answer: Reclaiming
6. Method to Speed Up Recovery:
- Answer:Cooling the recovery tank
7. Leak Repair and Verification Time for Comfort-Cooling Appliance (60 lbs of Refrigerant):
- Answer: 30 days
8. Cause of Overheating in Hermetic Compressors in a Vacuum:
- Answer: Compressor motor uses the flow of refrigerant for cooling
, 9. Use of Hydrostatic Tube Test Kit:
- Answer: To find leaks in the tube
10. Maximum Test Pressure for Leak Testing Low Pressure Centrifugal Chiller:
- Answer: 10 psig
11. Passive System-Dependent Recovery Device for Small Appliances:
- Answer:Uses a non-pressurized container
12. Definition of a Process Stub:
- Answer: Straight piece of tubing accessed using a piercing access valve
1. Low Charge Indicator in High Pressure Systems with Capillary Tube:
- Answer: Excessive superheat
2. Approved Refrigerant for New Household Appliances:
- Answer: R-600a
3. EPA SNAP Approved "Drop-In" Replacement for R-22:
- Answer: There are no direct drop-in refrigerant substitutes
4. Component that Reduces Flammability in HFO Refrigerants:
,- Answer: Fluorine
5. Process Returning Refrigerant to New Specifications (AHRI-700 Standards):
- Answer: Reclaiming
6. Method to Speed Up Recovery:
- Answer:Cooling the recovery tank
7. Leak Repair and Verification Time for Comfort-Cooling Appliance (60 lbs of Refrigerant):
- Answer: 30 days
8. Cause of Overheating in Hermetic Compressors in a Vacuum:
- Answer: Compressor motor uses the flow of refrigerant for cooling
, 9. Use of Hydrostatic Tube Test Kit:
- Answer: To find leaks in the tube
10. Maximum Test Pressure for Leak Testing Low Pressure Centrifugal Chiller:
- Answer: 10 psig
11. Passive System-Dependent Recovery Device for Small Appliances:
- Answer:Uses a non-pressurized container
12. Definition of a Process Stub:
- Answer: Straight piece of tubing accessed using a piercing access valve
