EPA Practice Test – Core #9

Which of the following is the R-500 refrigerant?

When refrigerants are in the suction line they are in what phase and state?

According to the Clean Air Act (CAA), R-22 must be:

Which of the following gasses can be used to pressure test a system, and be released as part of a leak test?

What is the temperature at which refrigerants begin to evaporate? 

What is the color of the high pressure gauge of a gauge manifold?

Which of the following has the lowest molecular weight?

What is the name of the amount of heat required to change the refrigeration from a liquid to a gas?

The condenser rejects heat from the system.

What happens to the boiling point of refrigeration liquid as the pressure of the refrigeration liquid increases?

HFC’s are highly stable in lower parts of the atmosphere.

Refrigerant leaks depend mostly on _______ ?

A lack of which of the following may cause asphyxiation?

 What is the name of the chemical found in the stratosphere, which is stable, and characteristically strips a free oxygen atom and then releases the chlorine ion, which then continues the chain reaction of destroying more ozone molecules?

An Ozone depletion potential of 1 is equal to which of the following refrigerants?

What is the EPA’s definition for a substantial leak increase percentage for industrial process and commercial refrigeration systems?

Natural refrigerants such as carbon dioxide and hydro-carbons (such as propane) have a high Global Warming Potential (GWP) compared to HFC’s.

 After what date will the servicing of R-22 based systems rely on recycled refrigerants?

In the case of a refrigerant leak, what color will the flame turn during a halide torch leak test?

In pounds per square inch, what is the pressure of the atmosphere?

Natural sources such as volcano eruptions contribute to what percentage of stratospheric chlorine?

The reaction of refrigerants with water is:

Which of the following is an undesirable property of a refrigerant?

Which phase is a refrigerant when it leaves the evaporator?

One may determine that refrigerants are still trapped in a system during a vacuum leak test, if the measure pressure increases by _______.