Free Practice Quiz Question List

2 Safety and Service Preparation Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Safety and Service Preparation, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: Wearing appropriate PPE makes it unnecessary to provide ventilation or isolate equipment when those controls are feasible and required.

A
True
B
False

Choose one

1 point

Before servicing a chiller, which approach provides a reliable basis for identifying its refrigerant?

A
Check the appliance nameplate, service records, and refrigerant labels.
B
Identify it from the recovery cylinder color.
C
Estimate it from the system pressure alone.
D
Assume the refrigerant based on the chiller model.

Written response

1 point

What is the operation called that removes remaining refrigerant vapor and non-condensables from a system to the required level?

Fill in the blank

1 point

Never use oxygen or ordinary compressed air to a refrigeration system.

Choose one

1 point

An apprentice is assigned work that may violate the integrity of stationary refrigeration equipment in the United States. Which condition is consistent with the applicable certification guidance?

A
An apprentice may work independently if a certified technician is reachable by phone.
B
An apprentice never needs supervision if the appliance is a chiller.
C
An apprentice may work under the applicable close and continual supervision provisions.
D
An apprentice may work only if the refrigerant has already been recovered.

Choose all

1 point

You are preparing a work area for chiller service. Which actions should you take? Select all that apply.

A
Tell affected personnel about the work and keep bystanders clear.
B
Confirm that the route to an exit is clear.
C
Place hoses across the main walkway to keep them close to the service connection.
D
Secure hoses and tools to reduce trip hazards.

Fill in the blank

1 point

Position approved recovery cylinders and protect them from .

True or false

1 point

True or false: During stationary appliance service, intentionally venting a covered refrigerant is prohibited.

A
True
B
False

Written response

1 point

For low-pressure appliances, what type of pressure is used to specify the EPA evacuation level in millimeters of mercury?

Choose one

1 point

You find that ventilation in an enclosed service area is inadequate and refrigerant vapor could collect there. What is the safest response?

A
Continue if wearing gloves, since gloves prevent refrigerant exposure.
B
Follow site procedures for the hazard and stop work if the conditions remain unsafe.
C
Move to a low enclosed space, where the refrigerant will be less disruptive.
D
Rely on the refrigerant's odor to determine whether the area is safe.

Choose all

1 point

Before starting recovery, which setup checks are appropriate? Select all that apply.

A
Confirm that the refrigerant and cylinder type match the planned recovery operation.
B
Assume any cylinder is suitable if it is empty.
C
Check the cylinder's capacity and allowable fill limit.
D
Arrange hoses to avoid trip hazards, sharp edges, hot surfaces, and moving parts.
E
Check the recovery machine's electrical supply, grounding, and ventilation requirements.

Choose one

1 point

Before starting recovery, what should you know in case there is a release or equipment problem?

A
Wait until a release occurs before deciding how to respond.
B
Keep the recovery unit running while leaving the area.
C
Know how to stop the recovery unit, isolate the system, and leave safely.
D
Plan only how to restart the recovery unit after a problem.

Open ended

1 point

You are preparing to open a low-pressure chiller circuit after refrigerant recovery. Describe the key planning checks you should complete, distinguish recovery from evacuation, and state the pressure basis you must use when checking the applicable low-pressure evacuation requirement.

True or false

1 point

Before recovery begins, a technician places an approved cylinder upright and protects it from heat, impact, and overfilling. Is this a suitable cylinder-preparation practice?

A
True
B
False

Choose one

1 point

A service task may expose a technician to refrigerant and electrical hazards. Which approach best follows the material's guidance for selecting protection?

A
Choose gloves and eye protection first, then skip ventilation if the PPE is appropriate.
B
Assess the job hazards, prioritize feasible engineering and work-practice controls, and select PPE for remaining hazards.
C
Use the same PPE for every service task because refrigeration hazards are consistent.
D
Rely on PPE whenever the work area is difficult to ventilate.

Written response

1 point

In the United States, what supervision provision may allow an apprentice to perform work that generally requires relevant EPA Section 608 certification?

Choose one

1 point

The nameplate, service records, and refrigerant labels leave the chiller's contents uncertain, and the refrigerant may be mixed. What should the technician do before connecting recovery equipment?

A
Identify the refrigerant from cylinder color and connect the recovery machine if the color seems familiar.
B
Assume the chiller model indicates the refrigerant and begin recovery.
C
Use an appropriate refrigerant identifier and follow its instructions before connecting recovery equipment.
D
Connect the recovery equipment and determine the refrigerant from pressure alone.

Written response

1 point

For a low-pressure appliance, the evacuation requirement is expressed in millimeters of mercury using which pressure reference, rather than gauge pressure?

Choose one

1 point

A technician is preparing to recover refrigerant from a low-pressure appliance. Which check best confirms that the recovery cylinder is suitable for the planned operation?

A
Use any available cylinder if it is empty and can be connected to the recovery machine.
B
Confirm the cylinder matches the refrigerant and recovery conditions, has adequate capacity, and will remain within its allowable fill limit.
C
Select the cylinder by color, then fill it until the recovery operation is complete.
D
Choose a cylinder with the largest capacity, without checking its refrigerant rating or fill limit.

Choose one

1 point

A work area has a clear route to the exit, but hoses could cross the walking path and the service connections are difficult to reach safely. Which preparation best addresses the remaining hazards?

A
Identify disconnects and isolation points, secure hoses against trips, and provide stable access to the service connections.
B
Keep the access route clear but leave hoses across it so they remain close to the service connections.
C
Arrange tools after recovery starts, when the technician can see which ones are needed.
D
Focus on lighting alone because electrical and trip hazards can be handled during service.

2 Safety and Service Preparation Online Quiz Questions

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