EPA Practice Test – Core #2

In what year was the Montreal protocol signed?

What kind of recovery is the fastest and takes up less volume per pound of refrigerant to recover?

How often must reusable containers for refrigerants be date-stamped and hydrostatically tested? 

In very high pressure appliances, which refrigerant is most often used?

What is the proper protocol for purged nitrogen gas?

Regarding recovery time, What is the result of using long hoses between the unit and the recovery machine?

Which one of the following has an ozone depletion potential (ODP) value of 1?

Dehydration evacuation does not remove middle oil or acid trapped in the oil.

Where in the refrigeration system is refrigerant a warm liquid?

Which device is located at the end of the liquid line?

What type of refrigerant is used with medium-pressure appliances?

Which phase is refrigerant in while it’s passing through the discharge line?

During evacuation of the refrigerant, how will a suction hose with a larger diameter affect the recovery rate of the refrigerant?

To obtain the most accurate readings during the evacuation process, the vacuum guage should be located as __________ as possible from the vacuum pump.

Why is oil used in the compressor?

On what type of equipment are Schrader valves present?

What poisonous substance is formed when refrigerants are exposed to flame or steam?

What substance is used to remove ice if ice is present on the sight glass?

Which refrigerant has the lowest ozone depletion potential (ODP)?

Which of the following refrigerants is compatible with disposable cylinders?

Which of the following devices makes a high-temperature, high-pressure, superheated refrigerant vapor from a low-pressure, low-temperature refrigerant vapor?

In a refrigeration system, the warmer the temperature the slower it will evacuate.

All refrigerant oils are hygroscopic.

What substance is obtained when ozone reacts with chlorine ions?

 It may be impossible to reclaim mixed refrigerants in the same tank.