EPA 608 CERTIFICATION EXAM 160 QUESTIONS &
CORRECT ANSWERS LATEST 2025
How many types of HVAC certifications are there? - ANSWER-There are 4 types.
What does a metering device do? - ANSWER-The metering device causes a
reduction in pressure, and therefore a reduction in saturation temperature.
What is absorbed in the evaporator? - ANSWER-Heat is absorbed in the
evaporator.
What happens in the evaporator? - ANSWER-Heat is absorbed in the evaporator
and causes the refrigerant to boil from liquid to vapor.
At the outlet of the evaporator the refrigerant is what? - ANSWER-The refrigerant
is now a low temperature, low pressure vapor.
As the refrigerant expels heat, the refrigerant condenses to a what? - ANSWER-It
condenses to a liquid.
At the condenser outlet what pressure is the refrigerant? - ANSWER-The
refrigerant is a high pressure liquid.
What is a metering device used for? - ANSWER-The metering device causes a
reduction in pressure, and therefore a reduction in saturation temperature.
,A system that uses a capillary tube or fixed bore metering device is usually
equipped with a blank? - ANSWER-Accumulator which would be located in the
suction line directly following the evaporator.
A system that uses a thermostatic expansion valve is usually equipped with a
what? - ANSWER-A receiver, which would be located in the liquid line directly
following the condenser.
The compound gauge is what color? - ANSWER-Blue.
The high pressure gauge is what color? - ANSWER-Red.
The blank measures low pressure (psig) and vacuum (inches Hg.). - ANSWER-
Compound gauge.
What does the high pressure gauge measure. - ANSWER-It measures high side
(discharge) pressure.
EPA regulations require that hoses be equipped with what? - ANSWER-Low loss
fittings that will minimize refrigerant loss when hoses are disconnected.
The stratosphere is located where? - ANSWER-Between 10 and 30 miles above
sea level.
What is the stratosphere comprised of? - ANSWER-Ozone.
, An Ozone molecule consists of what? - ANSWER-Three oxygen atoms (03).
What does Ozone protect us from? - ANSWER-Harmful ultraviolet radiation.
What does Ozone help maintain? - ANSWER-It helps maintain stable Earth
temperatures.
Depletion of Ozone in the stratosphere causes what? - ANSWER-Crop loss,
Increase in eye diseases, Skin cancer, Reduced marine life, Deforestation ,
Increased ground level ozone.
What depletes the ozone layer? - ANSWER-CFC's and HCFC's.
When a chlorine atom meets with an Ozone molecule, it takes how many Oxygen
atoms from the Ozone? - ANSWER-One.
When a chlorine atom meets with an Ozone molecule, it takes one Oxygen atom
from the Ozone. What compound does this form? - ANSWER-Chlorine Monoxide
(CIO). O2
A single Chlorine atom can destroy how many Ozone molecules? - ANSWER-
100,000 Ozone molecules.
Volcanoes contribute a blank quantity of Chlorine as compared to CFC's? -
ANSWER-A small quantity.
Will the chlorine in CFC's dissolve in water? - ANSWER-No.
CORRECT ANSWERS LATEST 2025
How many types of HVAC certifications are there? - ANSWER-There are 4 types.
What does a metering device do? - ANSWER-The metering device causes a
reduction in pressure, and therefore a reduction in saturation temperature.
What is absorbed in the evaporator? - ANSWER-Heat is absorbed in the
evaporator.
What happens in the evaporator? - ANSWER-Heat is absorbed in the evaporator
and causes the refrigerant to boil from liquid to vapor.
At the outlet of the evaporator the refrigerant is what? - ANSWER-The refrigerant
is now a low temperature, low pressure vapor.
As the refrigerant expels heat, the refrigerant condenses to a what? - ANSWER-It
condenses to a liquid.
At the condenser outlet what pressure is the refrigerant? - ANSWER-The
refrigerant is a high pressure liquid.
What is a metering device used for? - ANSWER-The metering device causes a
reduction in pressure, and therefore a reduction in saturation temperature.
,A system that uses a capillary tube or fixed bore metering device is usually
equipped with a blank? - ANSWER-Accumulator which would be located in the
suction line directly following the evaporator.
A system that uses a thermostatic expansion valve is usually equipped with a
what? - ANSWER-A receiver, which would be located in the liquid line directly
following the condenser.
The compound gauge is what color? - ANSWER-Blue.
The high pressure gauge is what color? - ANSWER-Red.
The blank measures low pressure (psig) and vacuum (inches Hg.). - ANSWER-
Compound gauge.
What does the high pressure gauge measure. - ANSWER-It measures high side
(discharge) pressure.
EPA regulations require that hoses be equipped with what? - ANSWER-Low loss
fittings that will minimize refrigerant loss when hoses are disconnected.
The stratosphere is located where? - ANSWER-Between 10 and 30 miles above
sea level.
What is the stratosphere comprised of? - ANSWER-Ozone.
, An Ozone molecule consists of what? - ANSWER-Three oxygen atoms (03).
What does Ozone protect us from? - ANSWER-Harmful ultraviolet radiation.
What does Ozone help maintain? - ANSWER-It helps maintain stable Earth
temperatures.
Depletion of Ozone in the stratosphere causes what? - ANSWER-Crop loss,
Increase in eye diseases, Skin cancer, Reduced marine life, Deforestation ,
Increased ground level ozone.
What depletes the ozone layer? - ANSWER-CFC's and HCFC's.
When a chlorine atom meets with an Ozone molecule, it takes how many Oxygen
atoms from the Ozone? - ANSWER-One.
When a chlorine atom meets with an Ozone molecule, it takes one Oxygen atom
from the Ozone. What compound does this form? - ANSWER-Chlorine Monoxide
(CIO). O2
A single Chlorine atom can destroy how many Ozone molecules? - ANSWER-
100,000 Ozone molecules.
Volcanoes contribute a blank quantity of Chlorine as compared to CFC's? -
ANSWER-A small quantity.
Will the chlorine in CFC's dissolve in water? - ANSWER-No.
