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Type 2 study 1
| Question | Answer |
|---|---|
| What is the definition of Type 2 certification | Answer What is the definition of Type 2 certification? Technicians maintaining, servicing, repairing or disposing of medium, high, and very high-pressure appliances, except small appliances as defined in Type 1 and motor vehicle air-conditioning systems |
| How can a technician determine system charge | Use the charge stated on the equipment nameplate to determine normal charge for leak rate calculation when the system is a packaged system charged at the factory |
| What is the Type 2 leak repair requirements? | The EPA’s leak repair requirements apply to all appliances using a regulated refrigerant. Once the threshold leak rate has been exceeded on any system with a charge size of 50 pounds or greater, the owner must repair the appliance. |
| As of January 1, 2019, the maximum leak rates when used for comfort cooling is? | 10% of the charge per year |
| As of January 1, 2019, the maximum leak rate when used for commercial refrigeration is? | 20% of the charge per year |
| As of January 1, 2019, the maximum leak rate when used for industrial process refrigeration is? | 30% of the charge per year |
| What are the leak repair time frames | If an appliance with 50 or more pounds of regulated refrigerant has exceeded the threshold leak rate, the equipment owner or operator has 3o days to repair the appliance so that it leaks below the threshold limit and conduct the initial verification test. |
| What is a system evacuation | A deep vacuum is measured in microns. A vacuum level of 500 microns should be achieved to ensure all moisture and non-condensables have been removed from a refrigeration system. |
| Why do nitrogen tanks require a pressure regulator | Because nitrogen tanks travel at a high pressure so it needs a pressure regulator |
| Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as? | type A- 1 |
| All Refrigeration & HVAC systems are protected by a? | pressure relief valve |
| Non-condensables will cause? | higher discharge pressure |
| A crankcase heater is often used to prevent refrigerant from migrating to the oil during periods of? | low ambient temperature |
| EPA regulations state that maintenance, service or repair involving the removal of the following component is a "major repair"? | compressor |
| What refrigerant can be used as a trace gas when checking for leaks? | R410A |
| What can be done with the refrigerant trace gas and nitrogen after the leak is found? | recover in a special tank |
| High pressure appliances can be evacuated to atmospheric pressure (O psig) when? | There is a leak |
| When dehydrating a system it should be evacuated to a level of? | 500 microns |
| When recovering from a system with a refrigerant leak, recover to a level of? | 0 psig |
Created by:
Jbtolen