EPA 608 CORE ACTUAL EXAM
FULLY SOLVED AND UPDATED
LATEST VERSION VERIFIED FOR
ACCURACY QUESTIONS AND
ANSWERS SOLVED 100% CORRECT
| GUARANTEED PASS | GRADED
A+
"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"
Page | 1
,"What MUST be placed on a refrigerant cylinder being returned for reclaiming. - CORRECT
ANSWER=> A refrigerant label."
"After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration
system, you should guard against what? - CORRECT ANSWER=> Trapping liquid refrigerant
between the service valves."
"When pressurizing a system with nitrogen, you should always? - CORRECT ANSWER=> Charge
through a pressure regulator."
"What are the three "R's"? - CORRECT ANSWER=> Recover, Recycle, and Reclaim."
"In relation to the three "R's" what is Recover? - CORRECT ANSWER=> To remove refrigerant in
any condition from a system and store it in an external approved container."
"In relation to the three "R's" what is Recycle? - CORRECT ANSWER=> To clean refrigerant for
reuse by seperating the oil from the refrigerant and removing moisture from the refrigerant by
passing it through one or more filter dryers."
"Can Recycled refrigerant be resold? - CORRECT ANSWER=> It cannot be re-sold but it can be re-
used."
"In relation to the three "R's" what is Reclaim? - CORRECT ANSWER=> To process refrigerant to a
level equal to new (virgin) product specifications as determined by chemical analysis."
"Can Reclaimed refrigerant be resold? - CORRECT ANSWER=> Yes, but must meet the standard set
forth in ARI 700 before it can be resold."
"What chemical has been found in the stratosphere indicating ozone depletion? - CORRECT
ANSWER=> Chlorine Monoxide (CLO)"
"What are 5 Type I appliances? - CORRECT ANSWER=> 1.Household refrigerators
2.Household freezers
3.Room air conditioners
4.Water Coolers
5.Drinking fountains"
"What are 6 Type II appliances? - CORRECT ANSWER=> 1.Walk-in coolers
Page | 2
,2.Walk-in freezers
3.Reach-in refrigerators
4.Reach-in freezers
5.Residential & Commercial comfort cooling systems
6.Ice machines"
"What is an example of a Type III appliance? - CORRECT ANSWER=> Low pressure chiller."
"When is "Dew Point" used? - CORRECT ANSWER=> When calculating Superheat."
"When is "Bubble Point" used? - CORRECT ANSWER=> When calculating Sub-cooling."
"What does the EPA require on all Type I equipment that uses Class I or Class II refrigerants. -
CORRECT ANSWER=> EPA requires a service aperature (process stub)."
"TXV - CORRECT ANSWER=> Thermostatic Expansion Valve"
"The EPA considers a major repair to be the replacement of what 4 items? - CORRECT ANSWER=>
1.Evaporator
2.Condenser
3.Compressor
4.Auxillary Heat Exchanger"
"When the refrigerant is put back into a Type III chiller, following recovery and system repair,
where is it added? - CORRECT ANSWER=> The charging valve on the evaporator."
"What method is used to find suspected water tube leaks in chillers? - CORRECT ANSWER=>
Hydrostatic (tube) test"
"What temperature should be attained when removing oil from a low pressure system to ensure
a lower level of refrigerants in the oil? - CORRECT ANSWER=> 130-Degrees F"
"The typical design burst pressure for a rupture disc is what? - CORRECT ANSWER=> 15 PSIG"
"Excessive moisture collection in the purge unit can indicate what? - CORRECT ANSWER=> Tube
Leakage"
Page | 3
, "Vacuum pumps need to be capable of pulling what level of vacuum? - CORRECT ANSWER=> 500
microns"
"All refrigeration systems containing more than 50 lbs. of refrigerant must be repaired when the
annual leak rate exceeds___? - CORRECT ANSWER=> 35%"
"The most efficient method of leak checking a charged low-pressure system is to use? - CORRECT
ANSWER=> Controlled hot water or heater blankets."
"Systems with open drive compressors are prone to leak where? - CORRECT ANSWER=> At the
shaft seal."
"What does ASHRAE standard 15 require? - CORRECT ANSWER=> A refrigerant monitor that will
sound and alarm and automatically start a ventilation system in equipment rooms before the
refrigerant concentration reaches the TLV-TWA."
"TLV-TWA - CORRECT ANSWER=> Threshold Limit Value, Time Weighted Average"
"A-1 Group Refrigerants only require what? - CORRECT ANSWER=> Oxygen Deprivation Sensor"
"All "B" rated refrigerants require what? - CORRECT ANSWER=> "Refrigerant Specific" Mechanical
Room Sensor."
"What are Cooling Towers? - CORRECT ANSWER=> They are heat removal devices used to transfer
process waste heat to the atmosphere."
"What is the maximum test pressure to use for pressurizing Type III centrifugal systems with
nitrogen? - CORRECT ANSWER=> 10 psig"
"Enough vapor has entered the system and you may begin charging liquid refrigerant when the
refrigerant saturation temperature increases to? - CORRECT ANSWER=> 36F"
“What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant
recovery? - CORRECT ANSWER=> November 14, 1994"
"Section 608 of the Federal Clean Air Act requires technicians to what? - CORRECT ANSWER=>
Recover all refrigerants."
Page | 4
FULLY SOLVED AND UPDATED
LATEST VERSION VERIFIED FOR
ACCURACY QUESTIONS AND
ANSWERS SOLVED 100% CORRECT
| GUARANTEED PASS | GRADED
A+
"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"
Page | 1
,"What MUST be placed on a refrigerant cylinder being returned for reclaiming. - CORRECT
ANSWER=> A refrigerant label."
"After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration
system, you should guard against what? - CORRECT ANSWER=> Trapping liquid refrigerant
between the service valves."
"When pressurizing a system with nitrogen, you should always? - CORRECT ANSWER=> Charge
through a pressure regulator."
"What are the three "R's"? - CORRECT ANSWER=> Recover, Recycle, and Reclaim."
"In relation to the three "R's" what is Recover? - CORRECT ANSWER=> To remove refrigerant in
any condition from a system and store it in an external approved container."
"In relation to the three "R's" what is Recycle? - CORRECT ANSWER=> To clean refrigerant for
reuse by seperating the oil from the refrigerant and removing moisture from the refrigerant by
passing it through one or more filter dryers."
"Can Recycled refrigerant be resold? - CORRECT ANSWER=> It cannot be re-sold but it can be re-
used."
"In relation to the three "R's" what is Reclaim? - CORRECT ANSWER=> To process refrigerant to a
level equal to new (virgin) product specifications as determined by chemical analysis."
"Can Reclaimed refrigerant be resold? - CORRECT ANSWER=> Yes, but must meet the standard set
forth in ARI 700 before it can be resold."
"What chemical has been found in the stratosphere indicating ozone depletion? - CORRECT
ANSWER=> Chlorine Monoxide (CLO)"
"What are 5 Type I appliances? - CORRECT ANSWER=> 1.Household refrigerators
2.Household freezers
3.Room air conditioners
4.Water Coolers
5.Drinking fountains"
"What are 6 Type II appliances? - CORRECT ANSWER=> 1.Walk-in coolers
Page | 2
,2.Walk-in freezers
3.Reach-in refrigerators
4.Reach-in freezers
5.Residential & Commercial comfort cooling systems
6.Ice machines"
"What is an example of a Type III appliance? - CORRECT ANSWER=> Low pressure chiller."
"When is "Dew Point" used? - CORRECT ANSWER=> When calculating Superheat."
"When is "Bubble Point" used? - CORRECT ANSWER=> When calculating Sub-cooling."
"What does the EPA require on all Type I equipment that uses Class I or Class II refrigerants. -
CORRECT ANSWER=> EPA requires a service aperature (process stub)."
"TXV - CORRECT ANSWER=> Thermostatic Expansion Valve"
"The EPA considers a major repair to be the replacement of what 4 items? - CORRECT ANSWER=>
1.Evaporator
2.Condenser
3.Compressor
4.Auxillary Heat Exchanger"
"When the refrigerant is put back into a Type III chiller, following recovery and system repair,
where is it added? - CORRECT ANSWER=> The charging valve on the evaporator."
"What method is used to find suspected water tube leaks in chillers? - CORRECT ANSWER=>
Hydrostatic (tube) test"
"What temperature should be attained when removing oil from a low pressure system to ensure
a lower level of refrigerants in the oil? - CORRECT ANSWER=> 130-Degrees F"
"The typical design burst pressure for a rupture disc is what? - CORRECT ANSWER=> 15 PSIG"
"Excessive moisture collection in the purge unit can indicate what? - CORRECT ANSWER=> Tube
Leakage"
Page | 3
, "Vacuum pumps need to be capable of pulling what level of vacuum? - CORRECT ANSWER=> 500
microns"
"All refrigeration systems containing more than 50 lbs. of refrigerant must be repaired when the
annual leak rate exceeds___? - CORRECT ANSWER=> 35%"
"The most efficient method of leak checking a charged low-pressure system is to use? - CORRECT
ANSWER=> Controlled hot water or heater blankets."
"Systems with open drive compressors are prone to leak where? - CORRECT ANSWER=> At the
shaft seal."
"What does ASHRAE standard 15 require? - CORRECT ANSWER=> A refrigerant monitor that will
sound and alarm and automatically start a ventilation system in equipment rooms before the
refrigerant concentration reaches the TLV-TWA."
"TLV-TWA - CORRECT ANSWER=> Threshold Limit Value, Time Weighted Average"
"A-1 Group Refrigerants only require what? - CORRECT ANSWER=> Oxygen Deprivation Sensor"
"All "B" rated refrigerants require what? - CORRECT ANSWER=> "Refrigerant Specific" Mechanical
Room Sensor."
"What are Cooling Towers? - CORRECT ANSWER=> They are heat removal devices used to transfer
process waste heat to the atmosphere."
"What is the maximum test pressure to use for pressurizing Type III centrifugal systems with
nitrogen? - CORRECT ANSWER=> 10 psig"
"Enough vapor has entered the system and you may begin charging liquid refrigerant when the
refrigerant saturation temperature increases to? - CORRECT ANSWER=> 36F"
“What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant
recovery? - CORRECT ANSWER=> November 14, 1994"
"Section 608 of the Federal Clean Air Act requires technicians to what? - CORRECT ANSWER=>
Recover all refrigerants."
Page | 4
