Free Practice Quiz Question List

4 Equipment, Cylinders, and Safety Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Equipment, Cylinders, and Safety, test your knowledge, and prepare for your next test or exam.

20 questions

Choose one

1 point

A recovery setup is transferring refrigerant slowly, and the hoses are long and narrow. Which change is most likely to reduce flow restriction?

A
Use a long, narrow hose to increase refrigerant flow.
B
Use a compatible hose that is as short and large in diameter as practical.
C
Choose a hose based only on its color.
D
Use any hose, because hose dimensions do not affect transfer.

Choose one

1 point

A closed recovery cylinder contains liquid and vapor and has a high pressure reading. What is the most accurate conclusion?

A
The refrigerant temperature may be high; pressure alone does not show how much refrigerant is in the cylinder.
B
The cylinder must be overfilled because pressure directly measures the refrigerant quantity.
C
The cylinder must contain air because every high pressure reading proves noncondensables are present.
D
The cylinder is safe to heat further because pressure indicates its fill level.

Choose one

1 point

A technician finds a cylinder with a familiar recovery-cylinder color but unclear markings. What should the technician do before using it?

A
Do not use it until its approval and contents can be verified from legible markings or labels.
B
Assume it is approved if its color matches a commonly used recovery-cylinder color.
C
Identify its contents by the pressure reading alone.
D
Use it if its valve fits the recovery equipment, even if its markings are unreadable.

Choose all

1 point

A technician is preparing a recovery cylinder for service and transport. Which actions are appropriate? Select all that apply.

A
Inspect the cylinder for damage, corrosion, legible markings, and valid qualification status.
B
Lay the cylinder on its side during transport so it cannot tip upright.
C
Secure the cylinder upright and protect its valve.
D
Keep the cylinder away from heat and clearly identify its refrigerant.
E
Combine unknown refrigerant with a known refrigerant to avoid using a second cylinder.

Choose all

1 point

Which practices are appropriate when pressure testing or leak detecting? Select all that apply.

A
Use dry nitrogen for pressure testing or leak detection.
B
Use oxygen if the test pressure is kept low.
C
Use a pressure regulator with nitrogen.
D
Use a relief device and do not exceed the equipment’s rated test pressure.
E
Use compressed air if the nitrogen supply is unavailable.

True or false

1 point

A technician has finished using a disposable refrigerant container and wants to use it to store recovered refrigerant. The container may be refilled for this purpose.

A
True
B
False

True or false

1 point

When liquid and vapor are both present in a recovery cylinder, its pressure alone is a reliable way to determine how much refrigerant it contains.

A
True
B
False

Written response

1 point

What is the maximum percentage of a recovery cylinder’s capacity that may be filled? Enter the percentage as a number.

Written response

1 point

What gas should be used for pressure testing or leak detection instead of oxygen or compressed air?

Fill in the blank

1 point

While liquid remains in a closed cylinder, its pressure is governed largely by the refrigerant’s .

Fill in the blank

1 point

A pressure–temperature chart must match the specific refrigerant because have different pressure–temperature relationships.

Open ended

1 point

Describe how a technician can use pressure and temperature to check whether a recovery cylinder may contain noncondensables, and explain why the result should be treated cautiously.

Choose one

1 point

A technician checks a pressure–temperature chart for a refrigerant blend with temperature glide. What should the technician verify when using the chart?

A
Check whether the chart calls for dew-point or bubble-point values.
B
Use the same chart values for every refrigerant blend.
C
Ignore the refrigerant identity if the measured temperature is known.
D
Use cylinder pressure alone to select a dew-point or bubble-point value.

True or false

1 point

A disposable refrigerant container may be refilled for refrigerant recovery if it is in good condition.

A
True
B
False

Written response

1 point

What type of injury can direct contact with liquid refrigerant cause to the skin?

Written response

1 point

A technician is filling a recovery cylinder. What is the maximum permitted fill level as a percentage of the cylinder’s capacity? Enter the value in percentage points.

Choose one

1 point

A technician wants to reduce hose-related restrictions during refrigerant transfer. Which hose arrangement best supports that goal?

A
A long, narrow hose
B
A short, larger-diameter hose
C
A long hose with a smaller internal diameter
D
A hose with additional flow restrictions

Choose one

1 point

Before using a recovery machine, what should a technician verify to confirm it is suitable for the planned recovery?

A
Use any recovery machine if its hoses fit the appliance
B
Rely on the machine’s color to determine its approved refrigerants
C
Check its certification label and manufacturer instructions for the applicable use and refrigerant
D
Use equipment certified for a different refrigerant if the cylinder is approved

Choose one

1 point

Which gas should a technician use for pressure testing or leak detection?

A
Oxygen
B
Dry nitrogen
C
Compressed air
D
Oxygen mixed with compressed air

Choose one

1 point

A technician is recovering two different refrigerants. Which practice best avoids making later recovery and reclamation difficult?

A
Mix them to reduce the number of cylinders needed
B
Keep refrigerants identified and separate
C
Mix them only if they are recovered from similar appliances
D
Combine them if the cylinder pressure is low

4 Equipment, Cylinders, and Safety Online Quiz Questions

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