EPA 608 Study Guide
The stratosphere is __ thick.
23 miles
The stratosphere is located ___ to ____ feet above sea level.
37,000-150,000
Recovery equipment must be:
Certified by an EPA-approved testing laboratory.
Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by:
EPA approved labr
When a system is in deep vacuum, you should never:
Energize the compressor
After the refrigerant has been recovered, which of the following should be used to flush the system?
Nitrogen
The use and release of CFCs and HCFCs has a far reaching effect on ________.
The Stratosphere
A high-pressure appliance containing less than 200 lbs. of an HCFC or HFC refrigerant must be evacuated (recovered) to a level of:
0 inches of vacuum
A high-pressure appliance containing 210 lbs. of R-407C refrigerant must be evacuated (recovered) to a level of;
10 inches of vacuum
A single chlorine atom can destroy _____ ozone molecules and has a lifetime of ___.
100,000 and 100 years
When removing oil from a low pressure system, a temperature of what must be attained?
130 degrees F
In a standard reaction, one chlorine will destroy ___ ozone and create ___ oxygen.
2-3
The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is:
25 mm of Hg absolute
The EPA requirement for repairing leaks on small appliances states that:
30%
When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to raise the system's saturation temperature to a minimum of;
36 degrees F
What is the blue gauge on a standard manifold for?
Low pressure and vacuum
What type of equipment can be worked on with Type III certification?
Low-pressure
Volcanoes provide a lot of natural chlorine into the atmosphere compared to refrigerants.
False
A refrigerant cylinder designed to hold recovered refrigerant has a:
Grey body and yellow top
The EPA requirement for repairing leaks on small appliances states that:
Leaks should be repaired whenever possible
If a leaking appliance with a regulated refrigerant is not going to be repaired, it must be:
Retrofitted or retired within 12 months
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 high side of the system only.
Ozone is
Slightly bluish in color and has a distinct odor
Which of the following best describes the refrigerant recovery process from an R-123 system?
Start with liquid removal and then switch over to vapor recovery
Over a 20-year study, a correlation in ___ and ___ provide good evidence the chlorine in the atmosphere comes from refrigerants.
The rise of chlorine and fluorine
Technicians who perform sealed-system service on small appliances must have:
Type 1 or Universal certfication
Water must be circulated through the tubes when evacuating refrigerant in order to prevent:
Water from freezing
The chlorine in CFCs and HCFCs:
Will not dissolve in water.
Which HC refrigerant is allowed for use in new domestic small appliances?
R-600a
The standard for machine room safety is:
ASHRAE 15
A small appliance is defined by the EPA as:
Appliances manufactured, charged, and hermetically sealed in a factory with 5 Lbs or less of refrigerant
Chlorine fluorine carbon, hydrogen chlorine fluorine carbon are___
CFCs and HCFCs
The ____ atom in refrigerants is responsible for destroying ozone.
Chlorine
EPA regulations state that removal of which component constitutes a "major repair"?
Compressor
Before shipping any used refrigerant cylinders, what standards should be checked?
Department of Transformation
Crop loss, eye disease and skin cancer have been attributed to:
Depletion of stratospheric ozone
To repair a chiller operating with R-22, the technician:
Must have type II certification
The Stratosphere is supposed to contain
Ozone
After the installation of any type of system, the unit should first be:
Pressurized with an inert gas and leak checked
An accumulator ____
Prevents liquid from entering the compressor, located after the evaporator
Which of the following refrigerant has a GWP of "1"?
R-1233zd
Disposable cylinders must be:
discarded
