EPA 608 CORE Exam | QUESTIONS AND
ANSWERS | LATEST VERSION 2025/2026
When moisture exists in an operating system, what is most likely to occur? - SOLUTION -Acid will
form.
What factor(s) affects the speed of evacuation? - SOLUTION -1) The size of the equipment being
evacuated.
2)The ambient temperature.
3) The amount of moisture in the system
A system is considered dehydrated when? - SOLUTION -The vacuum indicator shows you have
reached & held the required finished vacuum.
The over-evacuation of a system: - SOLUTION -Does not occur.
The size (capacity) of the vacuum pump & the size of the suction line used will determine what? -
SOLUTION -The length of dehydration time.
A system is dehydrated to do what? - SOLUTION -Remove water & water vapor.
To obtain an accurate vacuum reading during system evacuation, the system vacuum gauge should
be located: - SOLUTION -As far from the vacuum pump as possible.
To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least what? -
SOLUTION -0 psig
Never use an open flame to heat a refrigerant tank because? - SOLUTION -1) It can result in venting
refrigerant to the atmosphere.
2)The tank may explode, causing serious injury to people nearby.
3) Refrigerant in the tank may decompose, forming a toxic material.
When operating refrigerant recovery or recycling equipment, the following precautions should
always be followed. - SOLUTION -1) Wear safety glasses.
2) Wear protective gloves.
3) Follow all safety precautions for the equipment.
ANSWERS | LATEST VERSION 2025/2026
When moisture exists in an operating system, what is most likely to occur? - SOLUTION -Acid will
form.
What factor(s) affects the speed of evacuation? - SOLUTION -1) The size of the equipment being
evacuated.
2)The ambient temperature.
3) The amount of moisture in the system
A system is considered dehydrated when? - SOLUTION -The vacuum indicator shows you have
reached & held the required finished vacuum.
The over-evacuation of a system: - SOLUTION -Does not occur.
The size (capacity) of the vacuum pump & the size of the suction line used will determine what? -
SOLUTION -The length of dehydration time.
A system is dehydrated to do what? - SOLUTION -Remove water & water vapor.
To obtain an accurate vacuum reading during system evacuation, the system vacuum gauge should
be located: - SOLUTION -As far from the vacuum pump as possible.
To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least what? -
SOLUTION -0 psig
Never use an open flame to heat a refrigerant tank because? - SOLUTION -1) It can result in venting
refrigerant to the atmosphere.
2)The tank may explode, causing serious injury to people nearby.
3) Refrigerant in the tank may decompose, forming a toxic material.
When operating refrigerant recovery or recycling equipment, the following precautions should
always be followed. - SOLUTION -1) Wear safety glasses.
2) Wear protective gloves.
3) Follow all safety precautions for the equipment.
