Study sets, textbooks, questions
Upgrade to remove ads
HVAC Exam PDF 2
Terms in this set (58)
What does ozone in the stratosphere above the earth consist of?
Molecules containing 3 oxygen atoms
Which element of a CFC or HCFC molecule causes ozone depletion?
What characteristic(s) of CFCs and HCFCs make them more likely to reach the stratosphere than most other compounds containing chlorine?
They do not dissolve in water or easily break down in the atmosphere
How many ozone molecules can each chlorine atom in the stratosphere destroy?
Which of the following gases help form the earth's protective shield?
Ozone depletion in the stratosphere is what type of problem?
What does ozone depletion potential (or 'ODP') measure?
The ability of a substance to destroy ozone in the stratosphere
From which of the following does the ozone layer protect the earth?
Ultraviolet radiation from the sun
What is one of the most serious results of damage to the stratospheric ozone layer?
Increased rates of skin cancer in humans
Which human health effect increases from damage to the stratospheric ozone layer?
Cases of cataracts
What effect(s) can stratospheric ozone depletion have on the environment?
Decreased crop yields and damage to marine organisms
What is the strongest evidence that HCFCs are in the stratosphere?
Measurement of HCFCs in air samples from the stratosphere
What evidence demonstrates that chlorine in the stratosphere is primarily from man-made chemicals rather than from natural sources such as volcanoes?
The rise in the amount of chlorine measured in the stratosphere matches the rise in the amount of fluorine, which has different natural
Which of the following refrigerants has the lowest global warming potential?
Which of the following gases is used as the baseline measurement for global warming potential?
Which type of refrigerant typically has the lowest global warming potential?
How does the global warming potential of R-410A compare to carbon dioxide?
It is thousands of times greater
How do the global warming potentials of isobutane (R-600a), propane (R-290), and R-441A compare to the GWPs of HFC-134a, R-404A, and R-410A?
They are significantly lower
What are the characteristics of hydrofluoroolefins (HFOs)?
Non-ozone depleting, and have low global warming potentials
What characteristics of HFC refrigerants make them damaging to the environment?
They can have very high global warming potentials
What is the state of the refrigerant entering the compressor of a refrigeration system?
Low pressure vapor
Why are HFO refrigerants less flammable than hydrocarbon refrigerants?
They contain fluoride
Which of the following refrigerants is an HFO?
Which of the following is an HFC refrigerant?
Which of the following statements is true?
Propane cylinders for grilling contain impurities that can damage refrigeration equipment
Why are some hydrofluoroolefin (HFO) refrigerants classified as an "A2L"?
They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable
Which types of lubricants are HFO refrigerants miscible in?
Which of the following is a "low-pressure refrigerant" under EPA's section 608 regulations?
Which type of refrigerant has the highest ozone depletion potential (ODP)?
Which type of refrigerant is the most harmful to stratospheric ozone?
An example of a CFC refrigerant is:
Which of the following refrigerants have an ozone depletion potential of more than zero?
R-123 and R-22, R-134a and R-410A
Which of the following refrigerants contains chlorine?
HCFC refrigerants contain which of the following?
Hydrogen, chlorine, fluorine, and carbon
Which of the following refrigerants has the lowest ozone depletion potential?
Which of the following refrigerants damages stratospheric ozone?
Which refrigerant depletes the ozone layer?
What is being done in the US to stop damage to the stratospheric ozone layer?
Phasing out the use of chlorofluorocarbons and hydrochlorofluorocarbons
Which of the following is NOT a violation of the Clean Air Act or EPA's regulations?
Knowingly recovering an exempt refrigerant
State and local governments may;
establish laws that contain stricter requirements than the Clean Air Act/EPA regulations
What is the name of the EPA's program that identifies refrigerants with lower overall risks to human health and the environment?
The Significantly New Alternatives Policy (SNAP) Program
What is the Montreal Protocol?
An international treaty that addresses ozone-depleting substances and their alternatives
What is the phaseout date for the production and import of new R-22 in the US?
After the phase-out of a refrigerant, where will supplies of that refrigerant for equipment servicing come from?
Recovered and Reclaimed gas
In addition to fines and being required to appear in court, what penalty can be imposed on service technicians who violate Clean Air Act provisions?
They may lose their certification
Which of the following is NOT a violation of the refrigerant management regulations under the Clean Air Act?
Servicing a system that uses CFCs or HCFCs after the phaseout of those refrigerants
As of 2017, how much can a technician be fined for violating the Clean Air Act, including knowingly releasing non-exempt refrigerant from appliances?
$44,539 per day per violation
Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be resold?
Which of the following is a requirement for all CFC, HCFC, and HFC refrigerant recovery devices?
They must meet EPA standards
Which of the following appliances is NOT covered by EPA Section 608 Regulations?
Which of the following statements about "self-contained" recovery devices is true?
They remove refrigerant from an appliance without the assistance of components in the appliance
Why do EPA regulations require appliances to have a service aperture or process stub?
To make it easier to recover refrigerant
Recovery equipment that relies on the compressor in the appliance and/or the pressure of the refrigerant in the appliance is considered:
EPA does NOT require technicians (or the company employing the technician) to keep which of the following records when disposing of appliances with 5-50 pound refrigerant?
The model and serial number of the appliance
What happens if EPA regulations change after a technician becomes certified?
It is the technician's responsibility to comply with any future changes in the law
What does a Section 608 certification allow a technician to do?
Purchase or handle controlled refrigerants
What should a technician do if they lose their Section 608 certification card?
Request a replacement from their certifying organization
Distributors must verify which of the following before they can sell HCFC or HFC refrigerant?
The purchaser is or employs a Section 608 Certified technician
Sets with similar terms
Chapter 19 APES
Other sets by this creator
POL 382 Slide Set 21
POL 382 Slide Set 20
POL 382 Slide Set 19
POL 382 Slide Set 18
Other Quizlet sets
Unit 3 Test Review - Human Population & Demographi…
ECN221 Exam #3
sociology ch 16
HSC 210 Chapter 13, 14