EPA 608 Exam Questions & Answers
Updated Solution.
The state of the refrigerant entering the metering device is? - ans ✔✔ - a subcooled high pressure liquid.
What type of refrigerant is used in very high-pressure appliances? - ans ✔✔ - r-503
What type of refrigerant is used in medium pressure appliances? - ans ✔✔ - r-500
What type of refrigerant is used in high pressure appliances? - ans ✔✔ - r-410a and r-22
What device is located at the end of the liquid line? - ans ✔✔ - the expansion device.
What type of refrigerants are the least harmful to the ozone layer? - ans ✔✔ - hfc refrigerants.
How much money does the epa offer to individuals who report information about others who vent
refrigerants into the atmosphere? - ans ✔✔ - $10,000.
Which class of refrigerants does r-22 fall into? - ans ✔✔ - the hcfc class. (hydrochloroflurocarbons)
Which gas should be used when checking for leaks in various systems? - ans ✔✔ - nitrogen.
Which term describes the process of changing a refrigerant from a liquid to a gas using heat? - ans ✔✔ -
latent heat.
Refrigerants in the suction line are in what phase and state? - ans ✔✔ - cold vapor.
, How many miles above the earth's surface does the ozone layer in the stratosphere extend? - ans ✔✔ -
31 miles.
What year was the Montreal protocol put in place? - ans ✔✔ - 1989.
Refrigerant recovery equipment should be checked for (blank) on a daily basis? - ans ✔✔ - refrigerant
leaks and oil levels.
Should recovery machines be used on equipment that contains hydrogen? - ans ✔✔ - no.
Which purity test is used to determine the type of refrigerant? - ans ✔✔ - ari 700.
What type of unit only requires one service connection? - ans ✔✔ - self-contained recovery units.
Air will cause (blank) discharge pressures in a refrigeration system. - ans ✔✔ - higher.
A strong odor is around during the recovery process. What is most likely the cause of this? - ans ✔✔ - a
compressor burnout.
What is the best way (position) to transport refrigeration cylinders? - ans ✔✔ - upright.
You can only accurately read refrigerant pressure with a stable (blank)? - ans ✔✔ - temperature.
An explosion can occur if (blank) is vented in an enclosed environment? - ans ✔✔ - hydrogen.
Can refrigerants be mixed in a recovery tank? - ans ✔✔ - no.
What is the state of refrigerant leaving the liquid receiver? - ans ✔✔ - high pressure liquid.
Updated Solution.
The state of the refrigerant entering the metering device is? - ans ✔✔ - a subcooled high pressure liquid.
What type of refrigerant is used in very high-pressure appliances? - ans ✔✔ - r-503
What type of refrigerant is used in medium pressure appliances? - ans ✔✔ - r-500
What type of refrigerant is used in high pressure appliances? - ans ✔✔ - r-410a and r-22
What device is located at the end of the liquid line? - ans ✔✔ - the expansion device.
What type of refrigerants are the least harmful to the ozone layer? - ans ✔✔ - hfc refrigerants.
How much money does the epa offer to individuals who report information about others who vent
refrigerants into the atmosphere? - ans ✔✔ - $10,000.
Which class of refrigerants does r-22 fall into? - ans ✔✔ - the hcfc class. (hydrochloroflurocarbons)
Which gas should be used when checking for leaks in various systems? - ans ✔✔ - nitrogen.
Which term describes the process of changing a refrigerant from a liquid to a gas using heat? - ans ✔✔ -
latent heat.
Refrigerants in the suction line are in what phase and state? - ans ✔✔ - cold vapor.
, How many miles above the earth's surface does the ozone layer in the stratosphere extend? - ans ✔✔ -
31 miles.
What year was the Montreal protocol put in place? - ans ✔✔ - 1989.
Refrigerant recovery equipment should be checked for (blank) on a daily basis? - ans ✔✔ - refrigerant
leaks and oil levels.
Should recovery machines be used on equipment that contains hydrogen? - ans ✔✔ - no.
Which purity test is used to determine the type of refrigerant? - ans ✔✔ - ari 700.
What type of unit only requires one service connection? - ans ✔✔ - self-contained recovery units.
Air will cause (blank) discharge pressures in a refrigeration system. - ans ✔✔ - higher.
A strong odor is around during the recovery process. What is most likely the cause of this? - ans ✔✔ - a
compressor burnout.
What is the best way (position) to transport refrigeration cylinders? - ans ✔✔ - upright.
You can only accurately read refrigerant pressure with a stable (blank)? - ans ✔✔ - temperature.
An explosion can occur if (blank) is vented in an enclosed environment? - ans ✔✔ - hydrogen.
Can refrigerants be mixed in a recovery tank? - ans ✔✔ - no.
What is the state of refrigerant leaving the liquid receiver? - ans ✔✔ - high pressure liquid.
