Exam (elaborations)
EPA EXAM (TYPE 1) QUESTIONS WITH CORRECT ANSWERS
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Exam of 3 pages for the course Enphase at Enphase (EPA EXAM (TYPE 1))
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EPA EXAM (TYPE 1)When checking for non-condensable inside a recovery cylinder known to contain only
one refrigerant, why should the technician allow the temperature cylinder to stabilize to
room temperature before taking a pressure reading? - answerComparisons to a
pressure-temperature chart are only valid if both the pressure and temperature of the
refrigerant are stable and known.
A passive system-dependant recovery process for small appliances; - answercaptures
refrigerant in a non-pressurized container.
Which of the following are recommended safe work practices when recovering
refrigerants? - answerWear safety eyewear and butyl-lined gloves when
connecting/disconnecting hoses.
When using nitrogen in repairing a sealed refrigeration system, what should the nitrogen
tank always be equipped with? - answerRegulator
Why should low and high side access valves be installed when recovering refrigerant
from a household refrigerator? - answerTo improve speed of recovery.
Any person who opens an appliance containing CFC, HCFC, or HFC for maintenance,
service, or repair must have at least one self-contained recovery machine avaiable for
use. The exception to this rule are persons working on; - answerSmall appliances
All appliances must be equipped with a service aperture or process stub which is used
when adding or removing refrigerant from the appliance. What Is typically used on small
appliances? - answerA straight piece of tubing that is entered using a piercing access
valve.
The sale of CFC, HCFC, HFC and HFO refrigerant to service or install refrigeration and
air conditioning equipment is; - answerlimited by law to HVAC contractors and/or
Mechanical Engineers.
After recovering refrigerant from a sealed system, if nitrogen is used to pressurize or
blow debris out of the system, the nitrogen; - answermay be vented to the ambient air.
What gases can CFC and HCFC refrigerants decompose into at high temperatures, (e g
, open flames, glowing metal surfaces, etc.)? - answerPhosgene gas
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