EPA 608 - Core

Which type of refrigerant is the most harmful to stratospheric ozone? a. CFCs b. HCFCs c. HFCs d. HFOs

a. CFCs

Which of the following refrigerants is an HFO? a. R-1234yf b. R-123 c. R-134a d. All three are HFOs

a. R-1234yf

Which of the following is a HFC refrigerant? a. R-134a b. R-115 c. R-22 d. R-11

a. R-134a

Which refrigerant does not contain chlorine? a. R-134a b. R-12 c. R-22 d. R-124

a. R-134a

Which of the following refrigerants contain chlorine? a. R-22 b. R-134a c. R-410a d. R-1234yf

a. R-22

Which of the following is a high-pressure refrigerant under EPA's section 608 regulations? a. R-410A b. R-113 c. R-123 d. R-11

a. R-410A

What is the name of the EPA's program that identifies refrigerants with lower overall risks to human health and the environment? a. The Significant New Alternatives Policy (SNAP) Program. b. The GreenChill Program c. The Approved ASHRAE List(AAL) d. Energy Star

a. The Significant New Alternatives Policy (SNAP) Program.

What characteristics of CFCs and HCFCs make them more likely to reach the stratosphere than most other compounds containing chlorine? a. They do not dissolve in water or easily break down in the atmosphere. b. They are lighter than other chlorine compounds, making it easier for them to reach the stratosphere when released. c. They are stored under pressure, causing them to jet upward when released. d. They are attracted to Ultraviolet radiation.

a. They do not dissolve in water or easily break down in the atmosphere.

After the phase-out of a refrigerant, where will supplies of that refrigerant for equipment servicing come from? a. recovery and reclaimed gas b. solvent conversion c. foreign manufacturers d. Exemptions granted under the Montreal Protocol

a. recovery and reclaimed gas

How many ozone molecules can each chlorine atom in the stratosphere destroy? a. 1,000 molecules b. 100,000 molecules c. 100,000,000 molecules d. None. Chlorine is not the element in refrigerant that harms ozone.

b. 100,000 molecules

Which of the following gases is used as the baseline measurement for global warming potential? a. Ammonia b. Carbon Dioxide c. CFC-12 d. Propane

b. Carbon Dioxide

Which type of refrigerant typically has the lowest global warming potential? a. HCFCs b. HFOs c. HFCs d. All are equal

b. HFOs

What is the state of refrigerant entering the compressor of a refrigeration system? a. Low pressure subcooled liquid b. Low pressure superheated vapor c. High pressure subcooled liquid d. High pressure subcooled vapor

b. Low pressure superheated vapor

What does ozone in the stratosphere above the earth consist of? a. Molecules containing 2 oxygen atoms b. Molecules containing 3 oxygen atoms c. Molecules containing 4 oxygen atoms d. Molecules containing 5 oxygen atoms

b. Molecules containing 3 oxygen atoms

What are the characteristics of hydrofluoroolefins (HFOs)? a. Non-ozone depleting and have high global warming potentials. b. Non-ozone depleting and have low global warming potentials. c. Ozone depleting and have high global warming potentials. d. Ozone depleting and have low global warming potentials.

b. Non-ozone depleting and have low global warming potentials.

Which type of lubricants are HFO refrigerants miscible in? a. AB lubricants b. POE lubricants c. Mineral oils d. All refrigerant lubricants

b. POE lubricants

Which of the following statements is true? a. There is no difference between refrigerant grade hydrocarbon refrigerant and propane for grills. b. Propane cylinders for grilling contain impurities that can damage refrigerant equipment. c. Refrigerant-grade hydrocarbon refrigerant is of lower quality than consumer propane cylinders. d. Hydrocarbon refrigerants can be used as a retrofit refrigerant.

b. Propane cylinders for grilling contain impurities that can damage refrigerant equipment.

When working with an appliance containing HCFCs or HFCs, which of the following does NOT require a person to be a Section 608 certified technician? a. Removing refrigerant. b. Rewiring an external electrical circuit. c. Replacing a component. d. Performing any activity that violates the refrigerant circuit.

b. Rewiring an external electrical circuit.

Which of the following is a lawful use of HCFC-22? a. Creating new air conditioner systems using "dry-charge" components? b. Servicing existing R-22 systems. c. Charging any new system designed for R-407C. d. Retrofitting any equipment.

b. Servicing existing R-22 systems.

What does ozone depletion potential (or ODP) measure? a. The ability of a substance to cause global warming b. The ability of a substance to destroy ozone in the stratosphere c. The rating of health hazards caused by ozone depletion d. The length of time a refrigerant stays in the atmosphere.

b. The ability of a substance to destroy ozone in the stratosphere

Why are some of the hydrofluoroolefins classified as A2L? a. They have toxicity characteristics. b. They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable. c. They are prohibited for use in the U.S. d. They have ozone depleting potentials and have low global warming potentials.

b. They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable.

How do the global warming potentials of isobutane (R-600a), propane (R-290), and R-441A compare to the GWPs of HFC-134a, R404A, and R-410A? a. They are significantly higher. b. They are significantly lower. c. They are approximately equal d. They are slightly higher.

b. They are significantly lower.

Which of the following refrigerants damages stratospheric ozone? a. HFOs b. HFCs c. HCFCs d. Ammonia

c. HCFCs

HCFC refrigerants contain which of the following? a. Helium, Carbon, Fluorine, & Chlorine b. Hydrogen, Chlorine, Ferrite, & Carbon c. Hydrogen, Chlorine, Fluorine, &Carbon d. Hydrogen, Chlorine, Fluorine, & Calcium

c. Hydrogen, Chlorine, Fluorine, &Carbon

What is one of the most serious results of damage to the stratospheric ozone layer? a. Increased acid rain b. Increased rates of asthma c. Increased rates of skin cancer in humans d. Higher natural background radioactivity

c. Increased rates of skin cancer in humans

What is the strongest evidence that HCFCs are in the stratosphere? a. Chemical reactions predict there should be HCFCs in the upper atmosphere. b. Measurement of chlorine in air samples from the lower atmosphere. c. Measurement of HCFCs in air samples from the stratosphere. d. Satellite measurements of light passing through the atmosphere.

c. Measurement of HCFCs in air samples from the stratosphere.

Which of the following refrigerants have an ozone depletion potential of more than zero? a. R-600a and R-441A b. R-134a and R-410A c. R-123 and R-22 d. R-290 and R-404A

c. R-123 and R-22

Which of the following refrigerants has the lowest ozone depletion potential? a. R-22 b. R-123 c. R-410A d. R-502

c. R-410A

Which of these gases help form the earth's protective shield? a. Methane b. Radon c. Stratospheric Ozone d. Carbon Dioxide

c. Stratospheric Ozone

Why are HFO refrigerants less flammable than hydrocarbon refrigerants? a. They contain chlorine. b. They contain bromine. c. They contain fluorine. d. They contain carbon.

c. They contain fluorine.

From which of the following does the ozone layer protect the earth? a. Nuclear radiation from the Van Allen belt. b. Gamma radiation form the sun. c. Ultraviolet radiation from the sun. d. Infrared radiation from the sun.

c. Ultraviolet radiation from the sun.

What evidence demonstrates that chlorine in the stratosphere is primarily from man-made chemicals rather than from natural sources such as volcanoes? a. The rise in the amount of chlorine measured in the stratosphere matches the rise in the amount of fluorine, which has different natural sources than chlorine, over the same period. b. The rise in the amount of chlorine measured in the stratosphere matches the rise in ODS emissions over the same period. c. Samples of air taken from the stratosphere over erupting volcanoes show that volcanoes contribute a small quantity of chlorine to the stratosphere compared to CFCs and HCFCs. d. All of the listed reasons.

d. All of the listed reasons.

Which of the following is not a reason to recover refrigerants? a. Provide supplies for service after the refrigerant has been phased out. b. Prevent venting to the atmosphere. c. Prevent stratospheric ozone depletion. d. Avoid violating the warranty on equipment.

d. Avoid violating the warranty on equipment.

Ozone depletion in the stratosphere is what type of problem? a. Local b. Regional c. National d. Global

d. Global

How does the global warming potential of R-410A compare to that of carbon dioxide? a. It is lower. b. They are equal. c. It is hundreds of times greater. d. It is thousands of times greater.

d. It is thousands of times greater.

An example of a CFC refrigerant is: a. R-134a b. R-123 c. R-22 d. R-12

d. R-12

Which of the following refrigerants has the lowest global warming potential? a. R-134a b. R-407C c. R-410A d. R-600a

d. R-600a

Distributors must verify which of the following before they can sell HFC or HCFC refrigerant? a. The distributor is a section 608 certified distributor. b. The distributor is selling section 608 certified refrigerant. c. The purchaser owns certified recovery and/or recycling equipment. d. The purchaser is or employs a Section 608 certified technician.

d. The purchaser is or employs a Section 608 certified technician.

What characteristics of HFC refrigerants make them damaging to the environment? a. They are toxic to plants and animals at low doses. b. They contain chlorine which damages the ozone layer. c. They have high Ozone Depletion Potential (ODP) d. They can have very high global warming potentials.

d. They can have very high global warming potentials.