EPA Practice Test – Core #7

Most refrigerant oils will mix with R-134a?

Which device is used to pinpoint leaks in the refrigeration system?

What is the name of the process which transforms refrigerants to a level equal to new (virgin) product specifications as determined by chemical analysis?

On which of the following arrangements must relief valves be installed?

 Every _____ years, refillable cylinders must be hydrostatically tested and date-stamped.

Up to how many ozone molecules can a single chlorine atom destroy?

Before it can be resold, a reclaimed refrigerant must meet what standards?

During Evacuation, a heated refrigeration system will result in  a ____ dehydration time.

A recovery cylinder can fit and recover a maximum of three types of refrigerants?

What happens to the speed of the recovery when the ambient temperature is lower?

Hygroscopic oil has a high affinity for water.

The rise in the amount of what substance matches the rise in the amount of chlorine measured in the stratosphere over the past two decades?

The temperature of the earth is stably maintained in part by the ozone.

 What quality of ozone depletion potential belongs to R-134a?

 When was the Montreal Protocol instated?

 What are the potential consequences of service technicians who violate Clean Air Act provisions?

 Class 1 Refrigerants will have an ozone depletion potential greater than

 Recovery cylinders do not have a specific design.

During the recovery process, what is indicated to be burned out in case of the detection of a strong odor?

In which region or area is stratospheric ozone depletion a serious problem?

The condenser rejects heat from the system and changes high pressure, high temperature refrigerant vapor to low pressure, low temperature refrigerant vapor?

The lowest ozone depletion potential belongs to which of the following classes?

When chlorine atoms react with ozone molecules, which of the following compounds is obtained?

Cleaning refrigerants for immediate use by removing oil, moisture, and acidity from the refrigerant by using filter driers has to do with which of the following processes.

 Ozone at ground level is considered to be undesirable and a pollutant.