EPA 608 UNIVERSAL EXAM 2023 -2024 ACTUAL EXAM
ALL 160 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
A hermetic compressor must never be operated when: -
ANSWER-C) there is a dehydration vacuum in the system.
"Self-contained" recovery devices: - ANSWER-B) can capture
liquid and/or vapor refrigerant without the assistance of components in the air- conditioning or refrigeration equipment.
Systems charged with R-410A should be leak checked with: -
ANSWER-C) pressurized nitrogen.
R-410A is not a typical blended refrigerant because: - ANSWER-
- All of the above are true
A ternary refrigerant blend is a ____ part mixture. - ANSWER-B) three-part
In a refrigeration system, high pressure vapor is converted to high
pressure liquid in the: - ANSWER-D) condenser
Which of the following is an approved "drop-in" service replacement for R-12? - ANSWER-D) According to the EPA there are no "drop-in" replacements
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EPA 608 UNIVERSAL EXAM 2023 -2024 ACTUAL EXAM
ALL 160 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
The proper method of discarding a disposable refrigerant cylinder
is to: - ANSWER-B) assure that all refrigerant is recovered and
that the cylinder is rendered useless, then recycle the metal.
CFC refrigerants are so named because they contain the
elements: - ANSWER-A) chlorine, fluorine, carbon
Before you dispose of any system containing a refrigerant, you
must: - ANSWER-A) recover the refrigerant.
According to EPA regulations, which of the following procedures is not an approved technique for system cleanup after a burnout?
- ANSWER-B) flushing with liquid refrigerant to clean tubing
When using nitrogen to pressurize a system, you should always: -
ANSWER-B) Charge through a pressure regulator.
What effects can ozone depletion have on the environment? - ANSWER-D) all of the above
Non-Azeotropic refrigerants leak from a system: - ANSWER-B) in
uneven amounts due to different vapor pressures.
An example of an HCFC refrigerant is: - ANSWER-B) R-22 2 / 3
EPA 608 UNIVERSAL EXAM 2023 -2024 ACTUAL EXAM
ALL 160 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
Which chemicals are controlled by the Montreal Protocol? - ANSWER-D) all of the above
Systems charged with R-134a should be leak checked with: -
ANSWER-D) pressurized nitrogen.
When evacuating a system, the hoses should be: - ANSWER-D)
equal to or larger than vacuum pump inlet connection.
It has been illegal to vent substitutes for CFC and HCFC
refrigerants since: - ANSWER-D) November 1995.
Never use oxygen or compressed air to pressurize a system
because: - ANSWER-A) when mixed with compressor oil or some
refrigerants, it could explode.
Refrigerant cylinders should always be: - ANSWER-D) all of the
above
Even though R-22 is considered non-toxic, it: - ANSWER-B) can
cause asphyxia.
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