EPA 608: Type III Solved Exam Review |Question and Answer| 100% Correct

EPA 608: Type III Solved Exam Review |Question and Answer| 100% Correct Techs maintaining, servicing, repairing, or disposing of low pressure appliances must be certified as? *Ans* Type III or universal technician As of what date was the sale of CFCs and HCFCs restricted to certified techs? *Ans* Nov 14, 1994 Who is responsible to comply with changes in section 608? *Ans* The technician Because low pressure systems operate in a vacuum , where will leaks occur? *Ans* Gaskets or fittings (allow air or moisture into the system? What is the most effective method of leak checking a charged, low pressure system? *Ans* Pressurize the system using controlled hot water or heater blankets If controlled hot water or heater blankets are not available, what should be used to increase system pressure? *Ans* Nitrogen When pressurizing a low pressure system, do not exceed what pressure and why? *Ans* 10 psig because exceeding it can cause the rupture disc to fail What should be done before leak checking a water box? *Ans* Remove the water before placing the leak detector probe through the drain valve What device is used to leak test tubes? *Ans* Hydrostatic tube test kit Systems with open drive compressors are prone to leak where? *Ans* At the shaft seal Controlled hot water can be used for what purpose? *Ans* Raise the pressure in a lowpressure system for the purpose of opening the system for a non-major repair Major repair *Ans* Any maintenance, service or repair involving the removal of any or all of the final components: Compressor Condenser Evaporator Any auxiliary heat exchanger coil Starting in 2019, EPA regulations require that systems containing 50 lbs or more of refrigerant be repaired when the annual leak rate exceeds what percentage? *Ans* Comfort cooling- 10% Commercial refrigeration- 20% Industrial process refrigeration- 30% The appliance must be checked after what? *Ans* Each repair to verify the leak was successfully repaired When the leak rate exceeds the maximum percentage on a low-pressure system, what must be done? *Ans* The system owner must repair the appliance enough to bring the leak rate below the threshold, or retrofit or retire the applianc