Free Practice Quiz Question List

4 Safe Refrigerant Handling Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Safe Refrigerant Handling, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: A disposable refrigerant cylinder may be refilled if it appears undamaged and is still within its marked pressure rating.

A
True
B
False

Choose one

1 point

A technician's work may release refrigerant from stationary cooling equipment. Which EPA certification generally applies to this work in the United States?

A
EPA Section 609
B
EPA Section 608
C
Either certification is always sufficient

Written response

1 point

What chart should a technician consult to relate refrigerant pressure to expected saturation temperature?

Choose all

1 point

Select all accurately described hazards of these natural refrigerants.

A
Carbon dioxide can displace oxygen and operates at high pressure.
B
Ammonia is toxic.
C
Propane is flammable.
D
Carbon dioxide is safe to breathe at any concentration.
E
Propane is nonflammable.

True or false

1 point

True or false: A technician can use a cylinder's visible liquid level to confirm that it is below its maximum filling limit.

A
True
B
False

Choose one

1 point

A system requires a pressure test. Which procedure is appropriate?

A
Use oxygen because it is an inert test gas.
B
Use compressed air if the system is isolated.
C
Follow the manufacturer's procedure with an approved inert gas and appropriate regulator.
D
Heat the recovery cylinder to raise the test pressure.

Written response

1 point

In the United States, which EPA certification generally applies when a technician's work may release refrigerant from stationary equipment? Enter the section number and name.

Choose all

1 point

Select all practices that help locate or prevent refrigerant leaks.

A
Use a leak-detection method suited to the refrigerant and equipment.
B
Repair the leak rather than repeatedly topping up the charge.
C
Treat a normal pressure reading as proof that the system is leak-free.
D
Inspect joints, service ports and caps, valves, coils, and areas showing oil residue.

Choose one

1 point

A service label is unclear, and the refrigerant may be contaminated. What is the safest way to identify it before connecting recovery equipment?

A
Check the equipment nameplate and service records, then use an appropriate refrigerant identifier if needed.
B
Identify it from pressure alone.
C
Mix a small amount with another refrigerant to compare how they behave.
D
Assume it is the refrigerant most commonly used in similar equipment.

Choose one

1 point

A system has a confirmed leak and has lost refrigerant more than once. Which response best follows safe leak-prevention practice?

A
Add refrigerant whenever the charge seems low, then recheck later.
B
Repair the leak and verify tightness before evacuating and charging to manufacturer specifications.
C
Increase the system pressure until the leak becomes easier to see.
D
Use pressure alone to establish that the system is leak-free.

Choose one

1 point

A refrigerant is flammable, and the task requires recovery equipment designed for that hazard. Which approach is safest?

A
Use any available recovery equipment and keep ignition sources close to monitor the work.
B
Use recovery equipment designed for flammable refrigerants where required, and keep ignition sources away.
C
Use an oxygen cylinder to pressurize the refrigerant circuit before recovery.
D
Mix the refrigerant with another type to reduce its flammability.

Open ended

1 point

A technician must store and later transport recovery cylinders containing different refrigerants. Describe the key precautions for safe storage and transport, including how to prevent mix-ups and comply with shipment requirements.

True or false

1 point

A technician removes refrigerant from a system into an external container. Since the refrigerant has been recovered, it is necessarily clean enough for reuse without further processing. Is this true or false?

A
True
B
False

Choose one

1 point

A system has no readable refrigerant label, and its pressure reading seems consistent with more than one refrigerant. What is the safest way to identify its contents before service?

A
Identify the refrigerant from its operating pressure.
B
Review available service records and use an appropriate refrigerant identifier to verify the contents.
C
Assume the refrigerant used in the same model of system is present.
D
Compare the pressure with a chart for the refrigerant that seems most likely.

Choose one

1 point

A technician is comparing refrigerant families for environmental effects. Which statement correctly distinguishes ozone impact from climate impact?

A
CFCs: do not deplete ozone and generally have low global-warming potential.
B
HCFCs: do not deplete ozone, but always have high global-warming potential.
C
HFCs: do not deplete ozone, but many have high global-warming potential.
D
Hydrocarbons: are nonflammable and have high global-warming potential.

Choose one

1 point

A technician sees an unexpected gauge reading and needs to assess system operation. Which approach is appropriate?

A
Use the correct pressure–temperature chart and manufacturer service data, then compare the readings with expected saturation temperature and system conditions.
B
Add refrigerant until the pressure matches a standard value used for all systems.
C
Treat a normal-looking pressure as proof that the system has no leak.
D
Use the pressure reading alone to determine whether the charge is correct.

Written response

1 point

What chart should a technician use to relate refrigerant pressure to expected saturation temperature?

Written response

1 point

In the United States, what EPA certification section generally applies to a technician whose work may release refrigerant from stationary equipment?

Fill in the blank

1 point

An ASHRAE refrigerant classification is B2L. In this code, B indicates , while 2L indicates .

Fill in the blank

1 point

A technician is preparing to connect gauges and recovery equipment. Before connecting, verify the equipment's and , then inspect the and fittings.

4 Safe Refrigerant Handling Online Quiz Questions

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