EPA 608 UNIVERSAL EXAM ACTUAL EXAM ALL 160 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

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 airconditioning 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- D) All

of the above are true

A ternary refrigerant blend is a ____ part mixture. - ANSWER- B) threepart

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

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? - ANSWERB) 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

Which chemicals are controlled by the Montreal Protocol? - ANSWERD) all of the above

Systems charged with R-134a should be leak checked with: - ANSWERD) 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.