Free Practice Quiz Question List

2 Refrigerant Types and Environmental Properties Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Refrigerant Types and Environmental Properties, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: The sequence from CFCs through later refrigerant families means each newer family is safer and better for every application.

A
True
B
False

Choose one

1 point

A refrigerant is an HFC. Which conclusion about its environmental effects is supported?

A
They contain chlorine, so they have the same ozone-depletion pattern as CFCs.
B
They have zero ODP, but many can still have substantial GWP.
C
They all have zero ODP and zero GWP.
D
They are natural refrigerants with uniformly low flammability.

Fill in the blank

1 point

ODP compares ozone-depletion capacity with that of , which is assigned an ODP of .

Choose one

1 point

Two systems provide the same cooling service. System A uses a lower-GWP refrigerant but consumes substantially more electricity than System B. Which approach best compares their environmental impact?

A
Compare both leakage-related direct emissions and electricity-related indirect emissions.
B
Choose the refrigerant with the lowest GWP, because energy use cannot change the environmental comparison.
C
Ignore leakage because only electricity use affects climate impact.
D
Compare ODP alone, since it measures both ozone depletion and warming.

Choose all

1 point

Select all statements supported about HFOs and natural refrigerants.

A
Many HFOs have very low GWP and zero or near-zero ODP.
B
All natural refrigerants are nonflammable and nontoxic.
C
Natural refrigerants often have low GWP and zero ODP, although their hazards vary.
D
Every HFO has exactly the same environmental and safety properties.

Written response

1 point

What is the property called when a refrigerant blend's temperature changes as it evaporates or condenses at a given pressure?

True or false

1 point

True or false: An A1 safety classification means a refrigerant cannot create a hazard in any system or situation.

A
True
B
False

Written response

1 point

In an ASHRAE refrigerant safety classification, which letter indicates higher toxicity under the standard's criteria?

Choose one

1 point

R-32 is classified A2L. What does the flammability portion of this classification indicate?

A
Higher toxicity and higher flammability
B
Lower toxicity and no flame propagation under specified test conditions
C
Lower toxicity and lower flammability with low burning velocity
D
Higher toxicity and lower flammability with low burning velocity

Written response

1 point

CFC-11 is assigned an ODP of what unitless value?

Choose all

1 point

Select all properties that directly help determine whether a refrigerant can operate appropriately in a particular system.

A
Boiling point and saturation pressure
B
The refrigerant's family name alone
C
Compatibility with system materials, lubricants, seals, and components
D
The refrigerant's GWP alone

Open ended

1 point

Explain the difference between ODP and GWP, including what each compares against. Then explain why a refrigerant with zero ODP may still raise an environmental concern.

Written response

1 point

A system uses propane R-290. What is its ASHRAE safety classification?

Choose one

1 point

A designer learns that a candidate HFC has zero ODP. Which conclusion is justified before evaluating its climate impact?

A
It can have zero ODP while still having substantial GWP.
B
It must have zero GWP because it has zero ODP.
C
It must contain chlorine because it contributes to warming.
D
Its GWP can only be compared with CFC-11.

True or false

1 point

True or false: If a refrigerant has zero ozone-depletion potential, it must also have low global-warming potential.

A
True
B
False

Choose one

1 point

A designer comparing R-22 and R-32 wants to avoid ozone depletion. Which statement about these refrigerants is supported?

A
R-32, because it is an HFC and has zero ODP
B
R-22, because it is an HCFC and still contributes to ozone depletion
C
Both, because neither refrigerant contains chlorine
D
Neither, because both refrigerants are CFCs

Choose one

1 point

A technician sees that a refrigerant has an ASHRAE A2L safety classification. Which interpretation matches the classification?

A
Higher toxicity and higher flammability
B
Lower toxicity and lower flammability with low burning velocity
C
Lower toxicity and no flame propagation under specified test conditions
D
Higher toxicity and no flame propagation under specified test conditions

Choose one

1 point

A team is interpreting a refrigerant's GWP value. Which description correctly explains what that value compares?

A
It compares the ozone depletion from a volume of refrigerant with that from the same volume of CFC-11.
B
It measures the energy a refrigerant system consumes compared with a CO₂ system.
C
It compares the heat-trapping effect of a mass of gas with that of the same mass of CO₂ over a specified time period.
D
It measures how much refrigerant can evaporate before the system reaches its critical temperature.

Choose one

1 point

Which refrigerant properties help determine the pressures and temperatures at which it evaporates and condenses?

A
Chlorine content, which determines whether the refrigerant contains chlorine.
B
Toxicity classification, which determines whether the refrigerant is classified as A or B.
C
Indirect emissions, which measure greenhouse gases emitted during electricity generation.
D
Boiling point and saturation pressure, which help determine the pressures and temperatures at which evaporation and condensation occur.

Fill in the blank

1 point

An engineer is checking the conditions under which ordinary condensation is possible. The refrigerant's critical help define those conditions.

2 Refrigerant Types and Environmental Properties Online Quiz Questions

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