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

True or false: The listed recovery endpoint for a low-pressure appliance is 25 mm Hg absolute, regardless of the recovery equipment’s manufacture date.

A
True
B
False

Written response

1 point

What instrument should a technician use to track the recovery cylinder’s weight during refrigerant recovery?

Choose one

1 point

A technician finds that an appliance’s refrigerant is unknown and may be contaminated. What is the appropriate course of action?

A
Mix it with the closest-known refrigerant and recover the mixture into a shared cylinder.
B
Keep it separate and use a suitable dedicated recovery arrangement or consult a qualified service provider.
C
Release a small amount to identify it by smell before recovery.
D
Use any recovery unit, because the refrigerant identity does not affect equipment selection.

Written response

1 point

For a small appliance with a working compressor, what recovery percentage is generally specified when post-November 15, 1993 equipment is used?

Fill in the blank

1 point

Refrigerant that has been removed from an appliance and is described as recovered; this does not by itself show that it has been cleaned or tested.

Choose one

1 point

Which statement best describes push-pull recovery?

A
It removes all refrigerant, so no further recovery procedure is needed.
B
It uses liquid pressure to move vapor from the appliance to the recovery cylinder.
C
It uses vapor pressure to move bulk liquid, after which remaining refrigerant must be recovered appropriately.
D
It is a method for cleaning refrigerant inside the appliance.

Choose all

1 point

Select all actions that are appropriate when preparing a refrigerant recovery job.

A
Check the appliance label and service information to identify the refrigerant.
B
Use compatible recovery equipment and inspect its hoses, fittings, valves, and unit for damage.
C
Use a cylinder with a convenient pressure rating even if it is not rated for the refrigerant.
D
Inspect an approved cylinder, confirm its allowable fill weight, and place it on a scale.
E
Mix different refrigerants in one cylinder if that makes the recovery setup simpler.

True or false

1 point

True or false: The evacuation levels in the stationary-appliance table are deep-vacuum targets used when preparing a system for charging.

A
True
B
False

Choose one

1 point

A stationary medium-pressure appliance has a charge of 200 lb or more. What recovery endpoint applies when the recovery equipment was manufactured after November 15, 1993?

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

Choose all

1 point

Select all appropriate practices for managing recovered refrigerant after recovery.

A
Keep it in a properly rated, closed, clearly identified cylinder.
B
Combine unknown or contaminated refrigerant with a known refrigerant to simplify storage.
C
Keep different refrigerants and unknown or contaminated refrigerant separate.
D
Record its identity and quantity as required by workplace procedures and applicable regulations.
E
Assume it is ready for charging because it has been removed from the appliance.

Fill in the blank

1 point

In push-pull recovery, vapor pressure moves from the appliance to the recovery cylinder. Because this method does not remove all remaining refrigerant, complete recovery with .

Open ended

1 point

After recovery reaches the applicable endpoint, a technician isolates the appliance. Once pressure stabilizes, the reading is above the required endpoint. What could explain the pressure rise, and what should the technician do before opening the system?

True or false

1 point

True or false: When the equipment and setup allow it, liquid recovery can recover a large refrigerant charge more quickly.

A
True
B
False

Written response

1 point

A stationary medium-pressure appliance contains 150 lb of refrigerant, and the recovery equipment was manufactured after Nov. 15, 1993. What numerical evacuation endpoint, in in. Hg vacuum, applies before opening the appliance?

Choose one

1 point

A stationary high-pressure appliance contains 240 lb of refrigerant. The recovery equipment was manufactured before Nov. 15, 1993. What is the listed recovery endpoint before opening the appliance?

A
0 in. Hg vacuum
B
4 in. Hg vacuum
C
10 in. Hg vacuum
D
15 in. Hg vacuum

Choose one

1 point

A technician is determining the listed recovery endpoint for a very-high-pressure stationary appliance. Which statement correctly accounts for the recovery equipment’s manufacturing date?

A
0 in. Hg vacuum for either equipment-date category
B
4 in. Hg vacuum for either equipment-date category
C
10 in. Hg vacuum if the equipment was manufactured after Nov. 15, 1993
D
25 mm Hg absolute for either equipment-date category

Choose one

1 point

A technician proposes using compressed air to pressure-test a refrigerant system before recovery. What should the technician do?

A
Use oxygen briefly, then vent the system before recovery.
B
Use compressed air only if the refrigerant is nonflammable.
C
Use neither oxygen nor compressed air to pressurize or test the system.
D
Use compressed air if the system pressure is too low to check for leaks.

Choose one

1 point

During recovery, the unit triggers an alarm and its operating conditions are outside the manufacturer’s stated limits. What is the appropriate response?

A
Continue recovery while monitoring only the cylinder.
B
Stop the operation and investigate the abnormal condition.
C
Open the appliance to relieve pressure, then restart the unit.
D
Change valve positions until the alarm clears.

Choose one

1 point

For a stationary appliance containing more than 5 lb of refrigerant, which information is needed to determine the applicable recovery endpoint in the listed requirements?

A
Only the refrigerant type and the technician’s preferred method
B
Only the appliance’s pressure class and whether its compressor works
C
Only the appliance’s age and the amount of refrigerant recovered
D
Appliance pressure class, full charge, and the relevant recovery-equipment date

Written response

1 point

The recovery-endpoint table separates high-pressure appliances into charge categories of under a specified amount and that amount or more. What is the dividing charge, in pounds?

3 Refrigerant Recovery Procedures Online Quiz Questions

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