FREE ESCO EPA 608 Questions and Answers
After the refrigerant has been recovered, which of the following should be used to flush the system?
Explanation:
When nitrogen is used to pressurize or blow debris out of the system, the nitrogen may be vented to the ambient air.
Technicians who perform sealed-system service on small appliances must have:
Explanation:
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.
A small appliance is defined by the EPA as:
Explanation:
The EPA definition of a small appliance includes products manufactured, charged, and hermetically sealed in a factory with five pounds of refrigerant or less.
When a system is in a deep vacuum, you should never:
Explanation:
You should never energize the compressor. A hermetic compressor's motor winding could be damaged if energized when under a deep vacuum.
The chlorine in CFCs and HCFCs:
Explanation:
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.
Before shipping any used refrigerant cylinders, what standards should be checked?
Explanation:
When transporting cylinders containing used refrigerant, a Department of Transportation (DOT) classification tag and label must be attached to the cylinders.
Crop loss, eye disease, and skin cancer have been attributed to:
Explanation:
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.
The use and release of CFCs and HCFCs has a far-reaching effect on ________.
Explanation:
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.
When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should:
Explanation:
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.
Which HC refrigerant is allowed for use in new domestic small appliances?
Explanation:
Hydrocarbon (HC) R-600a is an approved refrigerant for new household refrigerators, freezers, and combination refrigeration/freezers.
A refrigerant cylinder designed to hold recovered refrigerant has a:
Explanation:
Approved refrigerant recovery cylinders can easily be identified by their colors: yellow tops and grey bodies.