EPA 608 CORE EXAM ALL 250 QUESTIONS AND

EPA 608 CORE EXAM ALL 250 QUESTIONS AND ( ANSWERS)

EPA 608 CORE EXAM 2026-2027 ALL

250 QUESTIONS AND CORRECT DETAILED ANSWERS

WITH RATIONALES ( ANSWERS)

Manufacture of CFCs was banned as of December 31, _______?

A) 1994

B) 1995

C) 2000

D) 2010 - ANSWER- 1995

Positive evidence that CFCs are in the stratosphere comes from

____________? - ANSWER- Measurements of CFCs in air samples

taken from the stratosphere

Under EPAs regulations reclaimed refrigerant must meet standards for

purity before it can be resold - ANSWER- ARI 700

________recovery devices are so named because they depend on

components of the system. That is, they capture refrigerant with the

assistance of components in the air conditioning or refrigeration

equipment they are emptying - ANSWER- System-dependent

All devices used for refrigerant recovery must

meet___________standards. - ANSWER- EPA

An example of an HCFC refrigerant: - ANSWER- R-22

Which of the refrigerants listed below contain no chlorine?

A) CFCs

B)HCFCs

C) HFCs

D) ODCs - ANSWER- HFCs

Which refrigerant is an HFC?

A) R-123

B) R- 134a

C) R- 11

D) R- 22 - ANSWER- R-134a

Ozone in the stratosphere consist of molecules containing _________

oxygen atoms. - ANSWER- Three

_____ in refrigerants causes ozone destruction. - ANSWER- Chlorine

Recovery devices that can capture liquid and/ or vapor refrigerant

without the assistance of components in the air conditioning or

refrigerant equipment are known as _____. - ANSWER- Self-contained

Technicians are certified to recover refrigerant during the maintenance,

service, or repair of packaged A/C or refrigeration equipment with five

pounds or less of refrigerant if they receive a passing grade on

__________ examinations. - ANSWER- Type 1

Technicians are certified to recover refrigerant during the maintenance,

service, or repair of high-pressure equipment if they receive a passing

grade on which of the following examinations? - ANSWER- Type 2

(high pressure certificate)

______ refrigerants leak at uneven rates due to the differences in the

vapor pressures. - ANSWER- Blended

When evacuating a system, the hoses should be: - ANSWER- Equal to

or larger than vacuum pump inlet connection

When moisture exist in an operating system, which of the following is

the most likely to occur? - ANSWER- Acid will form

The size (capacity) of the vacuum pump and the size of the suction line

used will determine: - ANSWER- The length of dehydration time

To obtain an accurate vacuum reading during system evacuation, the

system vacuum gauge should be located: - ANSWER- As far from the

vacuum pump as possible

What factors affects the speed of evacuation? - ANSWER- -) the size of

the equipment being evacuated

-) the ambient temperature

-) the amount of moisture in the system

A system is dehyd to: - ANSWER- Remove water and water vapor

Containers designated "refillable" by DOT are used for transporting

recovered pressurized refrigerant ________? - ANSWER- To meet

safety requirements

A fillable refrigerant cylinder must never be filled to more than ______

of its capacity by weight: - ANSWER- 80%

A cylinder with grey body and a yellow top indicates that the cylinder is

designated to hold: - ANSWER- Recovered refrigerant

Refrigerant vapors or mist should not be inhaled because: - ANSWERThey may cause heart irregularities and or unconsciousness

If corrosion is found within the body of a relief valve, the valve must be:

- ANSWER- replaced.

After refrigerant liquid transfer between recovery unit and the system

being emptied, you need to avoid trapping: - ANSWER- liquid

refrigerant between service valves.