3 Safety and Environmental Practices Free Online FlashCards

What qualifies as a small appliance under EPA Section 608?

A small appliance is factory-made, factory-charged, hermetically sealed, and contains five pounds or less of refrigerant.

Which Section 608 certification covers servicing small appliances?

Type I certification covers servicing small appliances.

What supervision does an apprentice need when working on a refrigerant circuit?

An apprentice may work on a refrigerant circuit under the close and continual supervision of a certified technician.

How does electrical or mechanical work differ from refrigerant-circuit service?

Electrical or mechanical work that does not affect the refrigerant circuit is different from opening or otherwise compromising that circuit.

Why may an appliance's off switch be insufficient before service?

An off switch alone may not prevent unexpected startup or control stored energy; follow the applicable lockout/tagout procedure when those hazards could be exposed.

What control is required when unplugging is the energy-isolation method?

When relying on unplugging for energy isolation, keep the cord-and-plug connection under your exclusive control.

What hazard can remain in a capacitor after an appliance is unplugged?

Capacitors can retain a dangerous charge after unplugging. Discharge them only by the approved method; never short them with a tool.

What atmospheric hazard can released refrigerant vapor create?

Released refrigerant vapor can displace oxygen, especially in small or poorly ventilated areas. Work in a well-ventilated area and stop if the atmosphere may be unsafe.

What should be confirmed before connecting recovery equipment?

Confirm the refrigerant and equipment compatibility before connection. Use equipment approved for the appliance and refrigerant, including when the refrigerant is flammable.

What recovery percentage applies to equipment made before November 15, 1993?

With recovery equipment manufactured before November 15, 1993, recover 80% of the refrigerant.

What recovery percentages apply to equipment made on or after November 15, 1993?

With equipment made on or after November 15, 1993, recover 90% if the compressor works, or 80% if it does not.

What evacuation level is an alternative to the listed small-appliance recovery percentages?

As an alternative to the specified recovery percentages, evacuate the appliance to four inches of mercury vacuum.