Free Practice Quiz Question List

1 Refrigerant Types and Classification Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Refrigerant Types and Classification, test your knowledge, and prepare for your next test or exam.

20 questions

Choose one

1 point

What can a trailing lowercase letter in a refrigerant designation indicate?

A
It indicates a zeotropic blend.
B
It can distinguish isomers.
C
It indicates a higher toxicity class.
D
It identifies a hydrocarbon refrigerant.

Choose one

1 point

A technician sees a refrigerant designation in the 400 series. Which type of blend does that series generally identify?

A
Azeotropic blends
B
Inorganic refrigerants
C
Zeotropic blends
D
Hydrocarbon refrigerants

Choose one

1 point

Which statement about R-1234yf is supported?

A
It is an HFO used in many newer vehicle air-conditioning systems.
B
It is a CFC used mainly in legacy vehicle systems.
C
It is an HCFC used widely in older air-conditioning systems.
D
It is a hydrocarbon used in domestic refrigerators.

Choose one

1 point

A technician considers replacing R-22 with R-410A in a system with an R-22 indoor coil. Which statement best describes the compatibility concern?

A
The refrigerants are interchangeable because both are used in air conditioning.
B
An R-22 indoor coil is not compatible with R-410A because of pressure differences.
C
Compatibility depends only on whether both refrigerants are HFCs.
D
An R-22 coil is compatible if the refrigerant is charged slowly.

True or false

1 point

Under the stated ASHRAE safety classification, ammonia (R-717) is classified B2L.

A
True
B
False

True or false

1 point

If a refrigerant has low GWP, a technician can assume it requires no special safety controls.

A
True
B
False

Written response

1 point

What refrigerant number denotes isobutane, which is common in domestic refrigerators? Enter the full R-number.

Written response

1 point

When charging a zeotropic blend from its cylinder, which phase do technicians commonly use to reduce the risk of changing the blend composition? Enter the phase name.

Fill in the blank

1 point

CFCs contain .

Fill in the blank

1 point

R-744 is the refrigerant designation for .

Choose all

1 point

Select all the accurate environmental statements about these refrigerant families.

A
CFCs can deplete stratospheric ozone, and many also have high GWP.
B
HCFCs deplete ozone, though generally less than CFCs.
C
HFCs do not significantly deplete ozone, but many have high GWP.
D
HFCs generally deplete ozone more than CFCs.
E
HCFCs have no ozone-depletion potential.

Choose all

1 point

Select all the refrigerant and application pairings supported by the material.

A
R-134a has been used in vehicle air conditioning and chillers.
B
R-404A has been used in commercial refrigeration.
C
R-410A has been used in many air-conditioning systems.
D
R-1234yf is used in many newer vehicle air-conditioning systems.
E
R-22 is used mainly in newer vehicle air-conditioning systems.

Open ended

1 point

Explain the different information conveyed by a refrigerant's family, R-number, and ASHRAE safety group. Why is an R-number alone insufficient to establish that the refrigerant is suitable for a particular system?

Choose one

1 point

A technician is considering R-290 for a system because it has very low GWP. Which conclusion is appropriate before selecting it?

A
Its low GWP means it can be used in any existing system.
B
Its low GWP does not remove the need for equipment and work practices appropriate to its flammability.
C
It is safe to substitute for R-22 because both are used in cooling equipment.
D
Its refrigerant number establishes that it is compatible with the system.

Choose one

1 point

Which refrigerant family is defined as containing hydrogen, fluorine, and carbon, but no chlorine?

A
HFCs
B
CFCs
C
Hydrocarbons (HCs)
D
Inorganic refrigerants

Written response

1 point

What ASHRAE safety class is assigned to R-717 (ammonia)?

Choose one

1 point

A technician encounters an unfamiliar refrigerant cylinder. Which approach provides a reliable identification and safety check?

A
Identify it by cylinder color, then check the color against a general color chart.
B
Read the printed refrigerant designation and check the equipment nameplate; consult the SDS for safety information.
C
Assume the refrigerant from the equipment's age and verify only if a problem occurs.
D
Use the pressure reading to determine the refrigerant without checking its label.

Written response

1 point

In the designation R-407C, what does the uppercase suffix distinguish? Enter the concise phrase.

Choose one

1 point

A technician is charging a system with a zeotropic blend. Which procedure helps reduce the risk of changing the blend composition?

A
Charge from the cylinder's liquid phase, following the equipment and refrigerant manufacturer's instructions.
B
Charge from the vapor phase because it guarantees the blend composition will remain unchanged.
C
Use pressure alone to determine how much refrigerant to add.
D
Mix the blend with another refrigerant to stabilize its composition.

True or false

1 point

True or false: If a refrigerant is identified by its R-number, that alone establishes that it is suitable for a particular system.

A
True
B
False

1 Refrigerant Types and Classification Online Quiz Questions

Related study packs and tools