2 Safety and Service Preparation Free Online FlashCards

How should PPE fit into a workplace hazard-control plan?

Assess the hazards and prioritize feasible engineering and work-practice controls; select PPE for the hazards that remain.

What ventilation hazard can a refrigerant release create?

Released refrigerant can displace oxygen. Keep air moving and avoid low or enclosed spaces where heavier-than-air vapor could collect.

Which emergency resources should a technician locate before work?

Before beginning, know the location of the exit, eyewash or wash station, alarm, and emergency contact method.

How should access to the work area be controlled?

Tell affected personnel about the work, keep bystanders clear, and use barriers or signs where needed.

How should recovery cylinders be positioned and protected?

Position approved cylinders upright and protect them from heat, impact, and overfilling. Confirm each cylinder is rated for the refrigerant and recovery conditions.

What should be checked to identify an appliance’s refrigerant?

Check the appliance nameplate, service records, and refrigerant labels. Do not identify refrigerant by cylinder color, pressure alone, or assumption based on the chiller model.

What should be done if refrigerant contents are uncertain?

If contents are uncertain or may be mixed, use an appropriate refrigerant identifier and follow its instructions before connecting recovery equipment.

Why must refrigerants be kept separate during recovery?

Do not mix refrigerants in a recovery cylinder. Mixed or unidentified refrigerant can make handling and reclamation difficult.

What certification generally applies to qualifying U.S. stationary refrigeration work?

In the United States, technicians whose work may violate the integrity of stationary refrigeration equipment generally need EPA Section 608 certification for the relevant equipment type. Applicable close and continual supervision provisions can cover apprentices.

What compatibility checks are needed before using service equipment?

Inspect hoses, fittings, gauges, recovery and vacuum equipment, and cylinders for damage and suitability. Equipment must be rated for the refrigerant and pressures involved.

Which gases must never be used to pressure-test a refrigeration system?

Never use oxygen or ordinary compressed air to pressure-test a refrigeration system. Follow approved manufacturer test methods and applicable requirements.

How do recovery and evacuation differ?

Recovery transfers refrigerant into an external container; evacuation removes remaining vapor and non-condensables to the required level.