Refrigeration Standards and Recovery Devices
Test your knowledge on small appliances and recovery devices, including the standards for pressure and maintenance practices. This quiz covers essential safety regulations and the proper procedures for refrigerant recovery. Ideal for students and professionals in HVAC fields.
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Quiz25 Questions
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Podcast1 Episode
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Refrigeration Standards and Recovery Devices
Quiz • 25 Questions
Study Notes
2 min • Summary
Refrigeration Standards and Recovery Devices - Podcast
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Materials
List of Questions25 questions
- Question 1
- can never be used as a recovery device
- can be configured as an active recovery device
- can only be used as a recovery device in combination with a pressurized container
- can only be used as a recovery device in combination with an unpressurized container
- Question 2
- A food freezer that holds 4 pounds of R-134a
- An MVAC-like system that holds three pounds of R-22
- A dehumidifier that holds seven ounces of R-600a
- A water cooler that holds 2 pounds of R-22
- Question 3
- on or near any evaporators and near any exposed refrigerant tubing
- near the machine compartment
- on the exterior of the refrigerator
- at all of the above locations
- Question 4
- 319 psig
- Question 5
- none
- Question 6
- recovering 90% of the refrigerant when the compressor is operating.
- Question 7
- Change the vacuum pump oil
- Check the recovery equipment for leaks
- Check the manifold hose set for leaks
- All of the above
- Question 8
- weight of the cylinder
- pressure of the refrigerant in the cylinder
- weight of the cylinder and subtract the empty cylinder weight to get the refrigerant weight
- both A and C
- Question 9
- Recover 90% of the refrigerant when operating, recover 80% when not operating, or evacuate to 4 inches of mercury vacuum.
- Question 10
- Manual hand valves on the ends of the gauge set hoses to minimize any release of refrigerant
- A red colored high-pressure hose and a blue colored low-pressure hose
- Self-sealing valves on the ends of the gauge set hoses to minimize any release of refrigerant
- either B or C
- Question 11
- Perform both A and B together
- Cool the compressor
- Heat the recovery cylinder
- Turn on the defrost heater
- Question 12
- R-450A
- R-290
- R-1235yf
- R-600a
- Question 13
- uses a pump to recover refrigerant
- can only be performed on a system with an operating compressor
- uses a non-pressurized container
- can only be performed on a system with an inoperable compressor
- Question 14
- straight piece of tubing that is entered using a piercing access valve.
- Question 15
- a compressor burnout has probably occurred.
- Question 16
- domestic refrigerator with a charge of 3 pounds
- reciprocating liquid chiller with a charge of 100 pounds
- small commercial walk-in freezer with a charge of 14 pounds
- both B and C
- Question 17
- contaminated oil indicates the system will need to be flushed.
- Question 18
- the fitting should be verified as leak free before beginning any recovery.
- Question 19
- When the recovery tank valve is closed
- When the recovery tank is extremely hot
- When there is a large volume of non-condensable gas in the refrigerant being recovered
- Any of the above conditions could cause excessive high-side pressure
- Question 20
- When the refrigerant contains non-condensable gases
- When the compressor does not run
- When the system leaks
- When the compressor oil is contaminated
- Question 21
- speed up recovery.
- Question 22
- Two valves, one on the high side and one on the low side of the compressor
- Three valves, one on the high side and one on the low side of the compressor and the third at the condenser outlet
- Only one access valve on the low side of the system
- Only one access valve on the high side of the system
- Question 23
- document all attempts to repair the leak
- recover all remaining refrigerant and dispose of the appliance
- repair the leak within 30 days
- not have to repair the leak
- Question 24
- R-290
- R-450A
- R-600a
- R-1235yf
- Question 25
- Only one access valve on the high side of the system.