EPA 608 Core Refrigeration Practice Exam Questions and Answers – Study Guide & Exam Review

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EPA 608 CORE REFRIGERATION
PRACTICE EXAM QUESTION AND
ANSWERS



Which refrigerant is an HFC?

R-134a




Which of the following is a lawful use of HCFC-22?

Servicing existing R-22 systems




State and local governments ________.

can make laws that are stricter requirements than the federal regulations




A ternary blend refrigerant is a ________.

three-part mixture




In there is a large release of refrigerant in a contained area ________.

leave the area, and return with self-contained breathing apparatus




Which of the following proves that HCFCs are in the stratosphere?




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HCFCs found in air samples from the stratosphere.




Which refrigerant contains chlorine?

R-12




Ozone depletion in the stratosphere is what type of problem?

Global problem




Why are flammable HFO refrigerants classified as A2L and not A2?

They have low flammability, being less flammable than HC refrigerants.




The service hose between the system and the vacuum pump should ________.

be as short as possible




Which ASHRAE refrigerant safety classification is the safest?

A1




A system containing a flammable refrigerant must have the process tubes marked with a ________ color

Red




What is a violation of the Clean Air Act or EPA's regulations?




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Failing to keep required records, Failing to meet the required evacuation levels before opening or
disposing of appliances, Knowingly releasing CFC, HCFC, or HFC refrigerants while repairing appliances
(all of the above)




________ refrigerant has an ODP that is greater than 0.

R-22




When working with nitrogen, ________.

always use a nitrogen regulator, always have a pressure relief valve downstream of the regulator, never
use liquid nitrogen (all of the above)




An oil sample should be taken for which of the following reasons?

Moisture or acid is suspected.




What makes HFC refrigerants damaging to the environment?

They can have very high global warming potentials.




Which type of refrigerant typically has the lowest global warming potential?

HFOs




Which refrigerants is an HFO?

R-1234yf




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