EPA Type 2 Questions and Answers Already Graded A

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EPA Type 2 Questions and Answers Already Graded A Heat pumps that have been retrofitted from R22 to R407C should be leak checked with: ✔✔pressurized nitrogen When a new system has been assembl ... ed, the first thing to do is: ✔✔pressurize the system with inert gas and leak check EPA regulations require that leaking commercial or industrial process refrigeration equipment must be repaired when the leak rate exceeds______ of the charge per year. ✔✔35% Prior to replacing the condenser coil in a high pressure system, the refrigerant was recovered and stored in a refillable container. The refrigerant: ✔✔can probably be charged back into the system R-410A requires recovery tanks rated for at least: ✔✔400 psig to recover liquid refrigerant you must connect one hose to the ✔✔liquid line The primary water source for cooling the condenser of a water-cooled recovery unit is: ✔✔local municipal water supply After refrigerant liquid has been recovered from a system, any remaining vapor is: ✔✔condensed by the recovery system With an air-cooled condenser on the roof of a building and the evaporator on the first floor, recovery should first occur: ✔✔from the liquid line entering the evaporator the recovery of refrigerant from a system as a vapor only will minimize the loss of: ✔✔oil When using recovery or recycling equipment that was made after 11-15-93 you must evacute a system containing MORE than 200 pounds of CFC-12 to ________ before making a major repair. ✔✔15 inches of HG vacuum When using recovery or recycling equipment that was made BEFORE 11-15-93 technicians must evacuate a unit that has a normal charge of 10 pounds of CFC-500 to _____ before disposing of the system. ✔✔4 inches of HG vacuum To change the compressor on a system cantaining 40 pounds R-500 using a recycling machine that was manufactured AFTER 11-15-93 you must isolate the compressor then: ✔✔evacuate the isolated section of the system to 10 inches of vacuum and hold. If the system pressure does not rise, remove the compressor. Recycling and recovery equipment maufactured after 11-15-93 does not need an oil separator ✔✔... A system can be evacuated to only atmospheric pressure when: ✔✔leaks in the appliance make the evacuation to the prescribed level unattainable To change the compressor on a system containing R-410A, you must isolate the compressor then: ✔✔Evacuate the isolated section of the system to atmospheric pressure and hold. If system pressure does not rise, remove the compressor. System- dependent recovery equipment CANNOT be used when: ✔✔the appliance contains over 15 pounds of refrigerant Moisture is removed a system by: ✔✔using a filter drier When a unit is opened for servicing the ______ should always be replaced ✔✔filter drier The backseating of a suction shutoff valvee will close the: ✔✔guage port When charging an R-12 refrigeration system that uses a water cooled condensor, you must first charge with vapor to a pressure of at least _____ , before switching to a liquid charging. ✔✔35 psig A compressor heater is used to: ✔✔reduce the amount of refrigerant in the lubricating oil While R-410A is a high pressure refrigerant, it can be stored in the back of your service van as long as: ✔✔the temperature inside the vehicle does not exceed 125 degrees F. This is the same guidance given for R-22 and other common refrigerants. For what refrigerant is an equipment room refrigerant monitor required under ASHRAE standard 15? ✔✔R-123 A reciprocating compressor should not be energized if the ✔✔discharge service valve has closed [Show More]

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