EPA 608 COMPLETE QUESTIONS WITH ANSWERS 2024 NEW

EPA 608 COMPLETE QUESTIONS
WITH ANSWERS 2024 NEW
Why are flammable HFO refrigerants classified as A2L and not A2? - CORRECT
ANSWER>>>>They have low flammability, being less flammable than HC refrigerants.

Which of the following statements is true? - CORRECT ANSWER>>>>Propane
cylinders for grilling contains impurities that refrigerant-grade propane does not have.

Over-evacuation of a system can ________ - CORRECT ANSWER>>>>never occur;
you can never pull too much air or other impurities from a system

A system containing a flammable refrigerant must have the process tubes or service
connection marked with a color marking that extends a minimum of ________ in both
directions - CORRECT ANSWER>>>>1 inch

Which additional safety precaution should be followed when using flammable
refrigerants? - CORRECT ANSWER>>>>Always make certain the recovery tank and
recovery unit are grounded before being used.
Do not cut or weld any refrigerant line when refrigerant is in the unit.

Which refrigerant can fractionate? - CORRECT ANSWER>>>>R-407C

Before shipping any recovered refrigerant, you must ________ - CORRECT
ANSWER>>>>properly label the refrigerant containe

What gas is used as the baseline measurement for GWP? - CORRECT
ANSWER>>>>Carbon dioxide

What happens when EPA regulations change after a technician is certified? -
CORRECT ANSWER>>>>The technician has a responsibility to keep up with changes
in EPA regulations

When shipping refrigerant cylinders, they should be stored ________ - CORRECT
ANSWER>>>>upright

Why is venting an "exempt refrigerant" legal? - CORRECT ANSWER>>>>Because the
EPA has determined that the refrigerant does not pose a threat to the environment if
released

If the compressor crankcase is the coldest part of the system, refrigerant will migrate to
the compressor because of the difference in ________ in the system. - CORRECT
ANSWER>>>>pressure

, A compound pressure gauge measures pressure in ________ - CORRECT
ANSWER>>>>psig and inches of mercury

In addition to the saturation pressure-temperature behavior of refrigerants, when
considering a substitute refrigerant also consider ________ - CORRECT
ANSWER>>>>cooling capacity
flammability and toxicity
materials compatibility

Ozone depletion in the stratosphere is what type of problem? - CORRECT
ANSWER>>>>Global problem

Which action is a violation of the prohibition on venting refrigerants? - CORRECT
ANSWER>>>>Adding nitrogen to a fully charged appliance to leak check the appliance
and then venting the mixture

When a system is operating, refrigerant enters the expansion device as a _______ -
CORRECT ANSWER>>>>subcooled or saturated liquid

Recovery cylinders should never be overfilled because ________ - CORRECT
ANSWER>>>>the internal pressure of the cylinders can rise in heated areas and cause
an explosion or venting

A flammable refrigerant can only burn or explode if the refrigerant concentration is
________. - CORRECT ANSWER>>>>both above the lower flammability limit and
below the upper flammability limit

Which of the following synthetic lubricants is used with ternary refrigerant blends
containing HCFCs? - CORRECT ANSWER>>>>Alkylbenzene

EPA regulations only allow recovered or recycled refrigerant to be ________. -
CORRECT ANSWER>>>>charged into the same or another appliance owned by the
same person

The ________ program identifies alternative refrigerants for use - CORRECT
ANSWER>>>>SNAP

Which health effect increases from loss of the stratospheric ozone layer? - CORRECT
ANSWER>>>>Cases of cataracts and skin cancer

Non-toxic refrigerants can still cause death because ________ - CORRECT
ANSWER>>>>they are heavier than air and can cause asphyxia

According to the Roland-Molina theory, ________ are destroyed by each chlorine atom
in the stratosphere - CORRECT ANSWER>>>>100,000 ozone molecules