EPA 608

On low pressure chillers, moisture typically enters the refrigerant system through ans air leaks from areas with gaskets or fittings The maximum test pressure for leak testing a low pressure centrifugal is: ans 10 psig Leak test and repair the chiller to reduce refrigerant loss from a pruge unit on CFC-11 chiller ans ... A hydrostatic tube test kit is used to: ans determine if a tube leaks Commercial and industrial process refrigeration systems must be repaire...

When a new system has been assembled, the first thing to do is? ans 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? ans Pressurized with nitrogen then leak checked. The EPA regulations require that any appliances containing more than 50 pounds of refrigerant (except for commercial & industrial process refrigeration) must be repaired when the leak rate exceeds _________ of the charge per ...

Which refrigerants contain the most chlorine? ans CFC. R11,R12,R500. As of what date did it become unlawful to intentionally release Class I and Class II refrigerants to the atmosphere? ans July 1 1992. Which refrigerants have the lowest ozone depletion potential (ODP)? ans HFC. R134a. The molecule found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is: ans Chlorine. Stratospheric ozone consists of: ans Three oxygen atoms. S...

a vacum pump should be connected ans as far away from the pump as possible a high capacity vacuum pump and short, large diameter hoses will ans dramatically reduce emissions, pressure drop, and evacuation/dehydration time ozone contains three ans oxygen atoms one chlorine atom can destroy ans 100,000 ozone molecules CFC's do not dissolve in water and do not breakdown into other compounds that dissolve in water ans CFC's cannot be washed out of the lowe...

Which Refrigerants contain the most chlorine? ans CFC's As of what date did it become unlawful to intentionally release Class 1 and Class 2 refrigerants to the atmosphere? ans July 1, 1992 Which Refrigerants have the lowest zone depletion potential? ans HFC's The molecule found in CFC's and HCHC's refrigerants that destroys the ozone in the stratosphere is: ans Chlorine Stratospheric ozone consists of: ans Three oxygen atoms Stratospheric ozone de...

What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? ans November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? ans Recover all refrigerants. The objective of the Clean Air Act is to protect what? ans The earth's stratosphere. HFC's ans HydroFlouroCarbon's CFC's ans ChloroFluoroCarbon's ODP ans Ozone Depletion Potential Which international treaty agreeme...

a vacum pump should be connected correct answer: as far away from the pump as possible a high capacity vacuum pump and short, large diameter hoses will correct answer: dramatically reduce emissions, pressure drop, and evacuation/dehydration time ozone contains three correct answer: oxygen atoms one chlorine atom can destroy correct answer: 100,000 ozone molecules CFC's do not dissolve in water and do not breakdown into other compounds that dissolve in water correct answer: CFC's ca...

What is the state of the refrigerant entering the metering device? correct answer: High pressure liquid What components are metering devices? correct answer: Thermostatic expansion valve and capillary tube What is the state of refrigerant entering the compressor? correct answer: Low Pressure Vapor What is the color of the low side gauge on the gauge manifold set? correct answer: Blue What can the compound gauge be used for? correct answer: Can only be used for low pressures and ...

To process refrigerant to a level that is equal to new product specifications as correct answer: Reclaiming The low side test pressure data plate value should be used by a technician to determine a safe pressure for correct answer: Leak testing Silicone elastomers are not compatible with what refrigerant correct answer: HFC How many molecules does an ozone molecule contain? correct answer: 3 oxygen atoms Recover any remaining refrigerant and then render the cylinder useless, ...

One of the most important tools for a HVACR tech is the gauge manifold set correct answer: The left side, compound gauge (blue) and the right side, high-pressure gauge (red), are attached to the manifold to measure system pressures. Hoses are used to connect the manifold to the refrigeration system's access ports or service valves to gain access to system pressures. The compound gauge measures low-pressure (psig) and vacuum (inches Hg). The left side, compound gauge (blue) and the right si...