EPA 608 Certification UPDATED ACTUAL
Exam Questions and CORRECT Answers
A recovery cylinder must not be filled more than ___ % of it's capacity by weight? - CORRECT
ANSWER 80%
How should refrigerant cylinders be shipped? - CORRECT ANSWER Up-right with proper
DOT classification tags.
What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will also work with
CFC's and HCFC's. - CORRECT ANSWER Polyolester
HCFC's have very low atmospheric concentrations measured in parts per? - CORRECT
ANSWER Trillion
All cooling systems containing more than 50 lbs. of refrigerant must be repaired when the annual
leak rate exceeds___? - CORRECT ANSWER 15%
Mineral Oils are used with? - CORRECT ANSWER All CFC's
Alkebenzene is used alone or as an additive for? - CORRECT ANSWER HCFC's (Will also
work with CFC's)
POE - CORRECT ANSWER Polyolester
What is the definition of a Type I Appliance? - CORRECT ANSWER A small appliance that
is manufactured, charged, and hermetically sealed in a factory with 5 Lbs. of refrigerant or less.
, What is the definition of a Type II Appliance? - CORRECT ANSWER High pressure or very
high pressure appliances except for small appliances and motor vehicle air conditioning.
Refrigeration systems containing more than 5 Lbs. of high or very high pressure refrigerants.
What is the definition of a Type III Appliance? - CORRECT ANSWER Low pressure
equipment like low pressure chillers.
All refrigerants are assumed to be a single chemical if they are numbered what? - CORRECT
ANSWER 1-399 and 600 and above.
What is an Azeotrope? - CORRECT ANSWER A mixture of two or more liquids in such a
ratio that it's composition cannot be changed by vaporizing it.
Azeotrope's are numbered what? - CORRECT ANSWER 500 to 599
What is fractionation? - CORRECT ANSWER When the refrigerant leaks, it leaks out in
different rates due to the different pressures.
What is Temperature Glide? - CORRECT ANSWER When the temperature of the vaporizing
refrigerant changes, even though the pressure remains the same.
What are the two basic types of recovery devices? - CORRECT ANSWER Self-Contained
and System-Dependent.
System-Dependent devices may only be used on appliances containing how much refrigerant? -
CORRECT ANSWER 15 Lbs of refrigerant or less
What MUST be placed on a refrigerant cylinder being returned for reclaiming. - CORRECT
ANSWER A refrigerant label.
Exam Questions and CORRECT Answers
A recovery cylinder must not be filled more than ___ % of it's capacity by weight? - CORRECT
ANSWER 80%
How should refrigerant cylinders be shipped? - CORRECT ANSWER Up-right with proper
DOT classification tags.
What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will also work with
CFC's and HCFC's. - CORRECT ANSWER Polyolester
HCFC's have very low atmospheric concentrations measured in parts per? - CORRECT
ANSWER Trillion
All cooling systems containing more than 50 lbs. of refrigerant must be repaired when the annual
leak rate exceeds___? - CORRECT ANSWER 15%
Mineral Oils are used with? - CORRECT ANSWER All CFC's
Alkebenzene is used alone or as an additive for? - CORRECT ANSWER HCFC's (Will also
work with CFC's)
POE - CORRECT ANSWER Polyolester
What is the definition of a Type I Appliance? - CORRECT ANSWER A small appliance that
is manufactured, charged, and hermetically sealed in a factory with 5 Lbs. of refrigerant or less.
, What is the definition of a Type II Appliance? - CORRECT ANSWER High pressure or very
high pressure appliances except for small appliances and motor vehicle air conditioning.
Refrigeration systems containing more than 5 Lbs. of high or very high pressure refrigerants.
What is the definition of a Type III Appliance? - CORRECT ANSWER Low pressure
equipment like low pressure chillers.
All refrigerants are assumed to be a single chemical if they are numbered what? - CORRECT
ANSWER 1-399 and 600 and above.
What is an Azeotrope? - CORRECT ANSWER A mixture of two or more liquids in such a
ratio that it's composition cannot be changed by vaporizing it.
Azeotrope's are numbered what? - CORRECT ANSWER 500 to 599
What is fractionation? - CORRECT ANSWER When the refrigerant leaks, it leaks out in
different rates due to the different pressures.
What is Temperature Glide? - CORRECT ANSWER When the temperature of the vaporizing
refrigerant changes, even though the pressure remains the same.
What are the two basic types of recovery devices? - CORRECT ANSWER Self-Contained
and System-Dependent.
System-Dependent devices may only be used on appliances containing how much refrigerant? -
CORRECT ANSWER 15 Lbs of refrigerant or less
What MUST be placed on a refrigerant cylinder being returned for reclaiming. - CORRECT
ANSWER A refrigerant label.
