Free ESCO EPA 608 Questions and Answers — Questions and Answers
Question 1: The use and release of CFCs and HCFCs has a far-reaching effect on ________.
- the stratosphere (Correct answer)
- our transportation
- heating equipment
- our water supply
Correct answer: the stratosphere
Explanation: <br> The introduction of CFCs and HCFCs has dramatically changed our lifestyles. Little did we know that the use and release of these compounds into the atmosphere would have far-reaching effects on our environment. The greatest effect is in the stratosphere, far removed from the Earth's surface.
Question 2: Crop loss, eye disease, and skin cancer have been attributed to:
- Depletion of Stratospheric nitrogen
- Depletion of Stratospheric chlorine monoxide
- Depletion of Stratospheric ozone (Correct answer)
- Depletion of Stratospheric oxygen
Correct answer: Depletion of Stratospheric ozone
Explanation: <br> One of the most serious results from the thinning and damaging of the stratospheric ozone layer is an increase in the rates of skin cancer in humans.
Question 3: The chlorine in CFCs and HCFCs:
- will dissolve in water.
- will not dissolve in water. (Correct answer)
- will rain out of the atmosphere.
- is heavier than air and cannot rise to the stratosphere.
Correct answer: will not dissolve in water.
Explanation: <br> The chlorine in CFCs and HCFCs will neither dissolve in water nor break down into compounds that dissolve in water, so they do not rain out of the atmosphere.
Question 4: A refrigerant cylinder designed to hold recovered refrigerant has a:
- yellow body and grey top.
- grey body and yellow top. (Correct answer)
- green body and yellow top.
- orange body and grey top.
Correct answer: grey body and yellow top.
Explanation: <br> Approved refrigerant recovery cylinders can easily be identified by their colors: yellow tops and grey bodies.
Question 5: Before shipping any used refrigerant cylinders, what standards should be checked?
- Department of Transportation (Correct answer)
- The Significant New Alternatives Policy (SNAP)
- Underwriters Laboratories
- All of the above
Correct answer: Department of Transportation
Explanation: <br> When transporting cylinders containing used refrigerant, a Department of Transportation (DOT) classification tag and label must be attached to the cylinders.
Question 6: Technicians who perform sealed-system service on small appliances must have:
- Type I, II, or III certification.
- Type I or Universal certification (Correct answer)
- Type II certification
- A Universal 609 certification
Correct answer: Type I or Universal certification
Explanation: <br> Persons handling refrigerant during maintenance, service or repair of small appliances must be certified as either a Type I Technician or as a Universal Technician.
Question 7: A small appliance is defined by the EPA as:
- Appliances are charged and hermetically sealed in a factory that contains 8 lbs or less of refrigerant.
- Appliances are charged and hermetically sealed in a factory that contains 10 lbs or less of refrigerant.
- Appliances with internal volumes no greater than 3 cubic feet.
- Appliances are manufactured, charged, and hermetically sealed in a factory that contains 5 lbs. or less of refrigerant. (Correct answer)
Correct answer: Appliances are manufactured, charged, and hermetically sealed in a factory that contains 5 lbs. or less of refrigerant.
Explanation: <br> The EPA definition of a small appliance includes products manufactured, charged, and hermetically sealed in a factory with five pounds of refrigerant or less.
Question 8: Which HC refrigerant is allowed for use in new domestic small appliances?
- R-404A
- R-600a (Correct answer)
- R-410a
- R-717
Correct answer: R-600a
Explanation: <br> Hydrocarbon (HC) R-600a is an approved refrigerant for new household refrigerators, freezers, and combination refrigeration/freezers.
Question 9: When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should:
- Run the compressor and recover from the low side of the system only.
- Install access fittings on both the high and low-pressure sides of the system.
- Run the compressor and recover from the high side of the system only. (Correct answer)
- Never allow the refrigerant to go to the high side of the system.
Correct answer: Run the compressor and recover from the high side of the system only.
Explanation: <br> An appliance with an operating compressor and completely restricted capillary tube or metering device requires only one access valve on the high side of the system.
Question 10: After the refrigerant has been recovered, which of the following should be used to flush the system?
- R-22
- Compressed air
- Nitrogen (Correct answer)
- Water
Correct answer: Nitrogen
Explanation: <br> When nitrogen is used to pressurize or blow debris out of the system, the nitrogen may be vented to the ambient air.
Question 11: When a system is in a deep vacuum, you should never:
- energize the compressor. (Correct answer)
- use a micron gauge.
- add refrigerant to the system.
- energize system fans and blowers.
Correct answer: energize the compressor.
Explanation: <br> You should never energize the compressor. A hermetic compressor's motor winding could be damaged if energized when under a deep vacuum.
Free ESCO EPA 608 Questions and Answers
The use and release of CFCs and HCFCs has a far-reaching effect on ________.