EPA Certification DUNDLED Exams 2023 with 100% correct answers

As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? July 1, 1992. What is the ozone layer and why is it important to us on Earth? Protective shield for Earth from the sun's harmful ultraviolent (UV) rays in the stratosphere layer that exte...

What does Section 608 of the Federal Clean Air Act state? Requires anyone who handles refrigerants to be certified in proper refrigerant handling techniques. What is the ozone layer composed if? 3 oxygen atoms bonded together Where is the ozone layer? 10-30 miles above sea level, in...

As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? a. July 1, 1992 b. July 1, 1993 c. November 14, 1994 d. January 1, 1996 a. July 1, 1992 What is the ozone layer and why is it important to us on Earth? a. Thin layer of R-22 in the at...

Ozone Three oxygen atoms bonded together Ozone Layer A layer in the stratosphere 10-30 miles from sea level that protects the Earth from ultraviolet radiation Stratosphere A section of our atmosphere which contains the ozone layer Oxygen Two oxygen atoms bonded together ...

What are the typical uses of the center port of gauge set? Used during evacuation, charging and recovery procedures. What color are the gauges on a manifold gauge set? Low pressure is blue, High pressure is red. What are the typical ranges of pressure measurements used on the gauges ...

Ozone stratosphere above the earth consists of molecules containing... 3 oxygen atoms (O3) The oxygen we breathe contains how many atoms in each molecule? two atoms (O2) The ozone layer consists of ozone in the stratosphere at an altitude of between __________above the earth 7 and 2...

When a new system has been assembled, the first thing to do is? Pressurize the system with an inert gas & leak check. After installation of a field-piped R-410A split heat pulp, the unit should first be? Pressurized with nitrogen then leak checked. The EPA regulations require that an...

How many types of HVAC certifications are there? There are 4 types. What does a metering device do? The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. What is absorbed in the evaporator? Heat is absorbed in the evaporator. ...

What is a blend of two or more components who's equilibrium vapor phase & liquid phase compositions are the same at a given pressure? Azeotrope This is a halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine, and bromine Halocarbon Chlorofluorocarb...

Refrigeration technicians who violate the Clean Air Act can: - Lose their EPA certification, be fined, be required to appear in Federal court. After 1995, any supplies of CFC refrigerants to service existing units in the USA can only come from: - recovery and recycling. Refrigerant t...

Technicians who perform sealed system service on small appliances must have; Type I or universal certification A small appliance is defined by EPA as; Appliances manufactured, charged, and hermetically sealed in a factory with 5 lbs or less of refrigerant Type I Certification is requ...

Azeotrope A blend of two or more components who's equilibrium vapor phase and liquid phase compositions Are the same at a given pressure Halocarbon A halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine and bromine Chlorine, Fluorine, carbon Chlo...

When moisture exists in an operating system, what is most likely to occur? Acid will form. What factor(s) affects the speed of evacuation? 1) The size of the equipment being evacuated. 2)The ambient temperature. 3) The amount of moisture in the system A system is considered deh...

July 1, 1992 As of what date did it become unlawful to release class 1 and class 2 refrigerants to the atmosphere? R-12 What refrigerant is a Chloro-fluoro-carbons (CFC)? R1-2-3 and R-22 Which refrigerants are Hydro-chlorofluoro-carbons (HCFC) ? Chlorine monoxide The molecul...