EPA 608 Certification Questions With
100%Verified Solutions|
What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will
also work with CFC's and HCFC's. - ANSWER Polyolester
HCFC's have very low atmospheric concentrations measured in parts per?
- ANSWER Trillion
All cooling systems containing more than 50 lbs. of refrigerant
must be repaired when the annual leak rate exceeds___? -
ANSWER 15%
Mineral Oils are used with? - ANSWER All CFC's
Alkebenzene is used alone or as an additive for? - ANSWER
HCFC's (Will also work with CFC's)
POE - ANSWER Polyolester
What is the definition of a Type I Appliance? - 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? - 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? - ANSWER Low pressure
equipment like low pressure chillers.
All refrigerants are assumed to be a single chemical if they are numbered
what? - ANSWER 1-399 and 600 and above.
What is an Azeotrope? - 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? - ANSWER 500 to 599
What is fractionation? - ANSWER When the refrigerant leaks, it leaks out
in different rates due to the different pressures.
What is Temperature Glide? - 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? - ANSWER Self-
Contained and System-Dependent.
System-Dependent devices may only be used on appliances containing
how much refrigerant? - ANSWER 15 Lbs of refrigerant or less
What MUST be placed on a refrigerant cylinder being returned for
reclaiming. - ANSWER A refrigerant label.
,After completing the transfer of liquid refrigerant between a recovery unit
and a refrigeration system, you should guard against what? - ANSWER
Trapping liquid refrigerant between the service valves.
When pressurizing a system with nitrogen, you should always? -
ANSWER Charge through a pressure regulator.
What are the three "R's"? - ANSWER Recover, Recycle, and Reclaim.
In relation to the three "R's" what is Recover? - 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? - 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? - ANSWER It cannot be resold but it
can be re-used.
In relation to the three "R's" what is Reclaim? - ANSWER To process
refrigerant to a level equal to new (virgin) product specifications as
determined by chemical analysis.
Can Reclaimed refrigerant be resold? - 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? - ANSWER Chlorine Monoxide (CLO)
, What are 5 Type I appliances? - ANSWER 1.Household refrigerators
2.Household freezers
3.Room air conditioners
4.Water Coolers
5.Drinking fountains
What are 6 Type II appliances? - ANSWER 1.Walk-in coolers
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? - ANSWER Low pressure
chiller.
When is "Dew Point" used? - ANSWER When calculating Superheat.
When is "Bubble Point" used? - ANSWER When calculating Sub-cooling.
What does the EPA require on all Type I equipment that uses Class I or
Class II refrigerants. - ANSWER EPA requires a service aperature
(process stub).
TXV - ANSWER Thermostatic Expansion Valve
100%Verified Solutions|
What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will
also work with CFC's and HCFC's. - ANSWER Polyolester
HCFC's have very low atmospheric concentrations measured in parts per?
- ANSWER Trillion
All cooling systems containing more than 50 lbs. of refrigerant
must be repaired when the annual leak rate exceeds___? -
ANSWER 15%
Mineral Oils are used with? - ANSWER All CFC's
Alkebenzene is used alone or as an additive for? - ANSWER
HCFC's (Will also work with CFC's)
POE - ANSWER Polyolester
What is the definition of a Type I Appliance? - 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? - 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? - ANSWER Low pressure
equipment like low pressure chillers.
All refrigerants are assumed to be a single chemical if they are numbered
what? - ANSWER 1-399 and 600 and above.
What is an Azeotrope? - 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? - ANSWER 500 to 599
What is fractionation? - ANSWER When the refrigerant leaks, it leaks out
in different rates due to the different pressures.
What is Temperature Glide? - 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? - ANSWER Self-
Contained and System-Dependent.
System-Dependent devices may only be used on appliances containing
how much refrigerant? - ANSWER 15 Lbs of refrigerant or less
What MUST be placed on a refrigerant cylinder being returned for
reclaiming. - ANSWER A refrigerant label.
,After completing the transfer of liquid refrigerant between a recovery unit
and a refrigeration system, you should guard against what? - ANSWER
Trapping liquid refrigerant between the service valves.
When pressurizing a system with nitrogen, you should always? -
ANSWER Charge through a pressure regulator.
What are the three "R's"? - ANSWER Recover, Recycle, and Reclaim.
In relation to the three "R's" what is Recover? - 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? - 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? - ANSWER It cannot be resold but it
can be re-used.
In relation to the three "R's" what is Reclaim? - ANSWER To process
refrigerant to a level equal to new (virgin) product specifications as
determined by chemical analysis.
Can Reclaimed refrigerant be resold? - 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? - ANSWER Chlorine Monoxide (CLO)
, What are 5 Type I appliances? - ANSWER 1.Household refrigerators
2.Household freezers
3.Room air conditioners
4.Water Coolers
5.Drinking fountains
What are 6 Type II appliances? - ANSWER 1.Walk-in coolers
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? - ANSWER Low pressure
chiller.
When is "Dew Point" used? - ANSWER When calculating Superheat.
When is "Bubble Point" used? - ANSWER When calculating Sub-cooling.
What does the EPA require on all Type I equipment that uses Class I or
Class II refrigerants. - ANSWER EPA requires a service aperature
(process stub).
TXV - ANSWER Thermostatic Expansion Valve
