EPA 608 Type II Exam Questions and Correct Answers Latest Update 2024 Already Passed

EPA 608 Type II Exam Questions and Correct Answers Latest Update 2024 Already Passed With an air-cooled condenser on the roof of a building and the evaporator on the first floor, recovery should first occur: ___________. a) from the vapor line entering the condenser b) from the discharge of the compressor c) from the liquid line entering the evaporator d) on the suction side of the compressor - Answers c) from the liquid line entering the evaporator R-410A is different from other ASHRAE 400 series non-azeotropic blends because: _______. a) R-410A behaves as a near azeotropic refrigerant, and can be topped off b) R-410A is a HCFC c) R-410A uses mineral oil d) all of the above - Answers a) R-410A behaves as a near azeotropic refrigerant, and can be topped off The fastest way to recover refrigerant from a system is to remove it in the _______ phase? a) final b) initial c) liquid d) vapor - Answers c) liquid A Recovery machine that uses a hermetic compressor will overheat when drawing a deep vacuum because: ___________. a) it runs faster than other equipment b) the motor needs the flow of refrigerant through the compressor to provide motor cooling c) the oils used in hermetic compressors burn at lower temperatures d) it has a higher compression ratio limit than other equipment - Answers b) the motor needs the flow of refrigerant through the compressor to provide motor cooling When a unit is opened for servicing, the _______ should always be replaced. a) thermostat b) metering device c) crankcase heater d) filter-drier - Answers d) filter-drier The method to charge a system that has a normal charge of 80 pounds is to charge with: ________. a) vapor through the suction line service valve b) liquid through the discharge service valve c) liquid through the suction service valve d) liquid through the liquid-line service valve - Answers d) liquid through the liquid-line service valve The EPA regulations require that any appliances containing more than 50 pounds of refrigerant (except for commercial and industrial process refrigeration) must be repaired when the leak rate exceeds ______ of the charge per year. a) 5% b) 15% c) 25% d) 35% - Answers b) 15% The evaporation temperature of R-410A at 100 psig is about: ______. a) 0 degrees F b) 30 degrees F c) 90 degrees F d) 120 degrees F - Answers b) 30 degrees F The primary water source for cooling the condenser of a water-cooled recovery unit is: _________. a) de-ionized water b) chilled water c) condenser water d) local municipal water supply - Answers d) local municipal water supply When a new system has been assembled, the first thing to do is: _________. a) evacuate the system b) pressurize the system with an inert gas and leak check c) pressurize the system with refrigerant to be used in the system d) introduce an initial charge of refrigerant and start the compressor - Answers b) pressurize the system with an inert gas and leak check The vacuum pump used to evacuate a system should be capable of pulling a vacuum of: ________. a) 10 mm Hg b) 20 mm Hg c) 500 microns d) 1000 microns - Answers c) 500 microns Dry nitrogen should be used to break the first vacuum when dehydrating by the double evacuation method. However, it: ________. a) often contains moisture b) is expensive c) is toxic d) can be dangerous if not used with a pressure regulator - Answers d) can be dangerous if not used with a pressure regulator The recovery rate can be increased by: ________. a) packing the recovery vessel in ice b) heating the recovery vessel c) using a smaller recovery vessel d) using a standard vacuum pump - Answers a) packing the recovery vessel in ice After reaching the required recovery vacuum on a system you must: ______________. a) immediately disconnect the recycling or recovery equipment and open the system for service b) immediately break the vacuum with nitrogen and open the system for service c) immediately pressurize the system with nitrogen and perform a leak check d) wait to see if the system pressure rises, indicating that there is still refrigerant in liquid form or refrigerant trapped in the oil - Answers d) wait to see if the system pressure rises, indicating that there is still refrigerant in liquid form or refrigerant trapped in the oil When servicing a 60-ton packaged rooftop unit, the easiest way to check the type of refrigerant it uses is to: _________. a) use your service gauge set and a refrigerant card b) ask the owner c) look at the unit nameplate d) determine the condenser size - Answers c) look at the unit nameplate R-410A requires certified recovery and recycling machines rated for at least: ________.