EPA 608 Exam Study CORE

When transporting cylinders containing used refrigerant, DOT requires that you:

• Use OSHA approved containers

• Attach DOT classification tags

• Ship by EPA certified carrier

• Do all of the above

How should refrigerant blends be charged?

• As a vapor

• At a very high temperature

• As a liquid

• The same as every other refrigerant

What units does a compound pressure gauge for the low side of the system measure in?

• PSIA

• Torrs and microns

• PSIG and inches of mercury

• PSIA and microns

What synthetic lubricant is presently used with ternary blends containing HCFCs?

• Alkylbenzene

• Glycol

• Ester

• Castor Oil

HFC refrigerants contain which of the following?

• Chlorine, flourine, & carbon

• Chlorine, flourine, & hydrogen

• Hydrogen, chlorine, & carbon

• Hydrogen, flourine, & carbon

For an appliance that uses a CFC, HCFC, or HFC refrigerant, which of the following violates the EPA prohibition on venting?

• Accidental releases associated with timely repair of an appliance

• Refrigerants emitted when cutting a line without properly evacuating the appliance

• Refrigerants emitted in a catastrophic failure of an appliance

• Refrigerants emitted when connecting or disconnecting low loss hoses to charge or service an appliance

Which factor does NOT affect the speed of evacuation?

• The size of the equipment being evacuated

• The ambient temperature

• The amount of moisture in the system

• The brand of micron gauge being used

What is being done in the U.S. to stop damage to the stratospheric ozone layer?

• Using natural gas instead of coal to produce electricity

• Phasing out the use of chlorofluorocarbons and hydrofluorocarbons

• Enforcing strict emission requirements on incinerators

• Increasing the energy efficiency of air conditioners

Which of the following refrigerants has the lowest global warming potential?

• R-134a

• R-407c

• R-410a

• R-500a

Which of the following leak detection methods is considered to be the most effective for locating the general area of a small leak?

• Standing vacuum test

• Electronic or ultrasonic tester

• Halide Torch

• Audible Sound