Free Practice Quiz Question List

3 Refrigerant Recovery Procedures Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Refrigerant Recovery Procedures, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

During stationary air-conditioning service in the United States, it is acceptable to intentionally vent refrigerant if recovery would take too long.

A
True
B
False

Choose one

1 point

A technician is recovering refrigerant into an approved cylinder. Which practice best prevents overfilling?

A
Fill the cylinder to its marked limit, then add a small amount to allow for later settling.
B
Weigh the cylinder during recovery and stop before it reaches its marked fill limit.
C
Estimate the amount by recovery time and check the cylinder weight only after the job.
D
Continue filling until the cylinder pressure matches the system pressure.

Written response

1 point

What recovery method removes refrigerant as a gas to clear the charge remaining after accessible liquid has been recovered?

Fill in the blank

1 point

For a burned-out compressor or contaminated refrigerant, collect the refrigerant in a clearly identified and do not combine it with clean refrigerant.

Choose one

1 point

Liquid entering a recovery machine too rapidly causes knocking. What should the operator do?

A
Increase inlet flow so the machine clears the liquid faster.
B
Switch off the machine and leave the valves open.
C
Throttle the inlet as the machine manual directs.
D
Vent a small amount of refrigerant to reduce the inlet pressure.

True or false

1 point

Recovering refrigerant from an appliance does not necessarily clean or purify the refrigerant.

A
True
B
False

Choose all

1 point

Which setup practices are appropriate for refrigerant recovery? Select all that apply.

A
Use a recovery machine approved for the refrigerant being handled.
B
Use one cylinder for different refrigerants if it is weighed carefully.
C
Use a separate, properly identified cylinder for each refrigerant.
D
Monitor the cylinder weight throughout recovery.
E
Use the same hose and cylinder-port arrangement for every recovery machine.

Fill in the blank

1 point

After the required level is reached, the system valves are closed as directed and pressure is allowed to stabilize. A pressure rise may indicate refrigerant remains in or .

Written response

1 point

Under the stated EPA leak exception, leaking sections must be brought to the lowest attainable pressure, not above what pressure? Enter the value in psig.

Choose one

1 point

A technician is handling a low-pressure appliance during a non-major repair that will not be followed by evacuation to the atmosphere. Under the specific EPA rule described, what must happen before the appliance is opened?

A
Open the appliance directly because low-pressure systems do not require recovery.
B
For the specified repair situation, pressurize the appliance to 0 psig before opening it.
C
Pressurize the appliance to 0 psig only after opening it.
D
Use the push-pull method in every case, regardless of the appliance or repair.

Choose all

1 point

Which statements correctly describe liquid push-pull recovery? Select all that apply.

A
It transfers accessible bulk liquid using pressure and a siphon effect.
B
It is suitable for every system and removes all remaining vapor.
C
It requires an appropriate system layout and enough accessible liquid.
D
A siphon can continue after the machine is switched off, so valves must be closed as directed.
E
It eliminates the need to monitor cylinder weight.

Choose one

1 point

An appliance contains 200 lb of refrigerant and is classified as medium-pressure. The recovery equipment was manufactured on or after November 15, 1993. What evacuation level applies?

A
4 in. Hg vacuum
B
15 in. Hg vacuum
C
25 mm Hg absolute
D
0 in. Hg vacuum

Open ended

1 point

Describe a safe recovery sequence for a normally charged system when accessible liquid can be recovered. Include how the technician should handle the remaining charge and verify completion.

Choose one

1 point

After recovering accessible liquid from a system, which method is used to remove the remaining refrigerant as gas?

A
Use liquid push-pull to remove all refrigerant, including the remaining vapor.
B
Use vapor recovery to remove the remaining refrigerant as gas.
C
Stop recovery once accessible liquid has been transferred.
D
Open the appliance after switching off the recovery machine.

Choose one

1 point

A technician must recover two different refrigerants. Which cylinder practice is appropriate?

A
Use one cylinder for all refrigerants if it is large enough.
B
Mix refrigerants only when both are clean.
C
Use a separate, properly identified cylinder for each refrigerant.
D
Use an unmarked cylinder if the refrigerant is later tested.

True or false

1 point

Liquid push-pull transfers accessible bulk liquid, but it does not remove the refrigerant vapor that remains in the system.

A
True
B
False

Choose one

1 point

During recovery, liquid entering the machine causes knocking. What should the technician do?

A
Throttle the inlet as the machine manual directs.
B
Increase liquid flow so the machine clears it faster.
C
Close all valves and leave liquid trapped between them.
D
Switch off the machine but leave the liquid path open.

Choose one

1 point

How should a technician manage cylinder filling during refrigerant recovery?

A
Estimate the amount transferred from the machine's run time.
B
Stop weighing the cylinder once liquid transfer begins.
C
Fill the cylinder to its marked limit, then allow it to warm.
D
Monitor cylinder weight and stop before its marked fill limit.

Written response

1 point

An appliance contains 250 lb of refrigerant and is in the high-pressure category. What evacuation level applies when the recovery equipment was manufactured on or after November 15, 1993?

Written response

1 point

For a low-pressure appliance undergoing a qualifying non-major repair that is not followed by evacuation to the atmosphere, to what pressure must it be pressurized before opening?

3 Refrigerant Recovery Procedures Online Quiz Questions

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