EPA 608 - core
R-600a
Isobutane
Under what conditions may you use a disposable cylinder to recover refrigerant? A) when the system contains the same refrigerant as a cylinder B) when the system contains less than 10 pounds of refrigerant C) when disposing of the refrigerant D) never
D) never
What does an ozone molecule protect us from?
Harmful ultraviolet radiation from the sun
How much can a person be fined per day per violation for knowingly releasing a regulated substance that violates the clean air act? A) $10,000 B) $25,000 C) $37,000 D) $44,539
D) $44,539
Which type of refrigerant contains no chlorine? A) CFCs B) HCFCs C) HCFC blends D) HFCs
D) HFCs
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 O-Zone depletion potential D) they can have very high global warming potentials
D) they can have very high global warming potentials
The molecule found in CFCs and HCFCs that depletes O-Zone is: A) Fluorine B) Chlorine C) Hydrogen D) Carbon
B) Chlorine
What is the significant new alternative policy (SNAP) program? A) covers only CFC and HCFC refrigerants Used in industrial process refrigeration. B) EPA's program that identifies refrigerants with lower overall risks to human health and the environment. C) Covers only CFC and HCFC refrigerants used in residential air-conditioning. D) relates to CFC and HCFC refrigerants used in commercial air conditioning.
B) EPA's program that identifies refrigerants with lower overall risks to humans health and the environment.
Which type of refrigerant typically has the lowest global warming potential? A) HCFCs B) HFOs C) HFCs D) all are equal
B) HFOs
Which international agreement (Treaty) regulated the production and use of CFCs, HCFCs, Halons, methyl chloroform and carbon tetrachloride? A) Treaty of Ghent B) Montreal Protocol C) Kyoto Treaty D) Council of Nicaea
B) Montreal Protocol
Which of the following refrigerant has a GWP of "1"? A) R-22 B) R-1233zd C) R-410A D) R-134a
B) R-1233zd
The low-side test-pressure data-plate valve should be used by a technician to determine a safe pressure for: A) refrigerant charging B) leak testing. C) recovering refrigerant D) retrofitting a system
B) leak testing.
What is the state of refrigerant entering the compressor of a refrigeration system? A) Low pressure sub-cooled liquid B) Low pressure superheated vapor C) High pressure sub-cooled liquid D) High pressure sub-cooled vapor
B) low pressure superheated vapor
To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis defines; A) recovery B) reclaiming C) reuse D) recycle
B) reclaiming
Reusable refrigerant containers under high-pressure must be hydrostatically tested how often? A) 1 year B) 3 years C) 5 years D) 7 years
C) 5 years
A refillable cylinder must not be filled above what percent of its capacity by weight? A) 50% B) 70% C) 80% D) 95%
C) 80%
Which ASHRAE classification mean slightly flammable? A) A1 B) B1 C) A2L D) A3
C) A2L
A refrigerant cylinder designed to hold recovered refrigerant has a: A) Yellow body and grey top. B) Green body and yellow top. C) Grey body and yellow top. D) Orange body and grey top.
C) Grey body and yellow top.
Which of the following refrigerants damages stratospheric ozone? A) HFOs B) HFCs C) HCFCs D) ammonia
C) HCFCs
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 refrigerant is an HFO? A) R-410A B) R-22 C) R-1234ze D) R-134a
C) R-1234ze
The compressor __________________________. A) Changes a high-pressure vapor to a high-pressure liquid. B) Changes a high-pressure liquid to a low pressure liquid. C) changes a low-pressure vapor to a high-pressure vapor. D) Changes a low-pressure liquid to a low-pressure vapor.
C) changes a low-pressure vapor to a high-pressure vapor.
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 and air samples from the stratosphere D) satellite measurements of light passing through the atmosphere
C) measurement of HCFCs and air samples from the stratosphere
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 from the sun C) ultraviolet radiation from the sun D) infrared radiation from the sun
C) ultraviolet radiation from the sun
Which type of refrigerant is the most harmful to stratospheric ozone? A) CFCs B) HCFCs C) HFCs D) HFOs
CFCs
R-744
Carbon dioxide
R-290
Propane
What does an ozone molecule help maintain?
Stable earth temperatures
A single chlorine atom can destroy how many O-Zone molecules? A) 100,000 B) 10,000 C) 1,000 D) 100
A) 100,000
Which of the following has the highest O-Zone depletion potential? A) CFCs B) HCFCs C) HFCs D) HFOs
A) CFCs
The condenser __________________________. A) Changes a high-pressure vapor to a high-pressure liquid. B) Changes a low pressure liquid to a low pressure vapor. C) changes a low-pressure vapor to a low-pressure liquid. D) changes a high-pressure liquid to a low-pressure liquid.
A) Changes a high-pressure vapor to a high-pressure liquid.
Silicone elastomers, for use in seals and gaskets, are not compatible with which refrigerants? A) HFOs B) HCFCs C) HFCS D) CFCs
A) HFOs
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 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? A) R-410A B) R-113 C) R-123 D) R-11
A) R-410A
HFCs ____________________; A) will not damage stratospheric o-zone, but have a high GWP. B) Are only harmful to ground level O-Zone. C) Will damage stratospheric O-Zone and have a low GWP. D) Will not deplete stratospheric ozone and have a low GWP.
A) Will not damage stratospheric O-Zone, but have a high GWP.
Before shipping any used refrigerant cylinders, check that the cylinder meets what standards: A) Department of transportation B) Underwriters laboratories C) The significant new alternatives policy (SNAP) D) All of the above
A) department of transportation
Crop loss, Eye disease, and skin cancer have been attributed to; A) Depletion of stratospheric ozone B) Depletion of stratospheric nitrogen C) Depletion of stratospheric chlorine monoxide D) depletion of stratospheric oxygen
A) depletion of stratospheric ozone
Recover any remaining refrigerant and then render the cylinder useless, then recycle the metal is the proper disposal method for; A) disposable cylinders B) recovery cylinders C) one pound cans D) accumulator cylinders
A) disposable cylinders
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 manufactures D) exemptions granted under the Montreal Protocol
A) recovery and reclaimed gas
An ozone molecule contains; A) Four oxygen atoms B) Three oxygen atoms C) Two oxygen atoms D) One oxygen atom
B) Three oxygen atoms.
The chlorine in CFCs and HCFCs; A) Will rain out of the atmosphere. B) Will not dissolve in water. C) is heavier than air and cannot rise to the stratosphere. D) Will dissolve in water.
B) Will not dissolve in water.
Which of the following gases is used as a baseline measurement for global warming potential? A) ammonia B) carbon dioxide C) CFC-12 D) propane
B) carbon dioxide
HCFCs contain; A) hydrogen, fluorine, and olefin B) hydrogen, chlorine, fluorine, and carbon C) chlorine, fluorine, and carbon D) hydrogen, fluorine, and carbon
B) hydrogen, chlorine, fluorine, and carbon.
What are the characteristics of hydrofluoroolefins (HFOs)? A) Non O-Zone depleting and have high global warming potentials. B) non O-Zone depleting and have low global warming potentials. C) o-Zone depleting and have high global warming potentials D) o-Zone depleting and have low global warming potentials
B) non O-Zone depleting and have low global warming potentials
Clean refrigerant for reuse by separating The oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more filter driers, is the definition of; A) recover B) recycle C) reuse D) reclaim
B) recycle
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
How did the global warming potential's 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
Where is the stratosphere located?
Between 7 and 30 miles above sea level.
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
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
Which of the following is an HFC refrigerant? A) R-134a B) R-115 C) R-22 D) R-11
R-134a
