HVAC: EPA 608 Certification Study Guide
Study online at https://quizlet.com/_28enbv
1. Are there drop-in No because the new refrigerants are incompatible with the oils and lubricants
replacements for used in R-12 systems.
R-12 systems? Why
or why not?
2. What type of oil is Ester based oils and they do not mix with other oils
used in R-134a and
what oils will it mix
with?
3. What type of lubri- Alkylbenzene lubricant
cant is used with
HCFCs?
4. What is differ- Ternary blends are three-part mixtures whereas azeotropic blends are blends
ence b/w ternary of two or more compounds that act like a single compound.
blend a azeotropic
blend?
5. What is the trait of It absorbs (takes on) moisture
a hygroscopic lu-
bricant?
6. What is temper- Temp. blend is the difference between the dew point and the bubble point
ature glide and
what type of blend
won't have it?
7. Dew Point Occurs when saturation temp in evaporator causes refrigerant to change from
liquid to vapor
8. Bubble Point Occurs when saturation temp in condenser changes refrigerant from vapor to
liquid
, HVAC: EPA 608 Certification Study Guide
Study online at https://quizlet.com/_28enbv
9. Will the gases in a No because different refrigerants in blend have different vapor pressures,
ternary blend leak causing them to leak at uneven rates
at the same rate?
Why or why not?
10. Refrigeration transfer of heat from one place to another
Process
11. Evaporator Absorbs heat into system from space to be cooled. Absorption of heat causes
refrigerant to boil. Upon leaving, refrigerant changed to low pressure, low
temperature vapor
12. Compressor Takes low pressure, low temp vapor and changes it to a high-temp, high-pres-
sure, superheated vapor and delivers it to the condenser
13. Condenser Rejects heat from system and changes refrigerant from high-temp, high-pres-
sure vapor into high-pressure, high-temp liquid
14. Metering Device reduces pressure of refrigerant and changes the high-pressure, high-temp
liquid into low pressure, low temp liquid.
15. Compound Gauge Typically blue and measures low pressure (psig) and vacuum (inHg).
16. High Pressure Red and measures high side (discharge) pressure. 0 to 500 psi
Gauge
17. What does a com- Vapor
pressor compress?
18. Why will refrig- Because of the vapor pressure difference between refrigerant and oil
erant migrate to
the crankcase in a
compressor?
, HVAC: EPA 608 Certification Study Guide
Study online at https://quizlet.com/_28enbv
19. What color is Red
the high pressure
gauge?
20. What color is Blue
the low pressure
gauge?
21. What needs to Triple evacuate system, install permanent filter-drier, conduct deep vacuum
happen if oil has before recharging
been contaminat-
ed by burnout?
22. What are three Rs Recover, recycle, reclaim
of refrigeration?
23. Recover to remove any refrigerant in any condition from system and store in external
container without necessarily testing or processing in any way
24. Recycle To clean refrigerant for immediate reuse by separating oil from refrigerant and
removing moisture and acidity from refrigerant by use of products like filter
driers
25. Reclaim To process refrigerant to level of new product specifications as determines by
chemical analysis
26. What standards EPA-approved equipment testing organization. Service aperture or process stub
must refrigerant
recovery equip-
ment meet and
what components
must all Type I and
Study online at https://quizlet.com/_28enbv
1. Are there drop-in No because the new refrigerants are incompatible with the oils and lubricants
replacements for used in R-12 systems.
R-12 systems? Why
or why not?
2. What type of oil is Ester based oils and they do not mix with other oils
used in R-134a and
what oils will it mix
with?
3. What type of lubri- Alkylbenzene lubricant
cant is used with
HCFCs?
4. What is differ- Ternary blends are three-part mixtures whereas azeotropic blends are blends
ence b/w ternary of two or more compounds that act like a single compound.
blend a azeotropic
blend?
5. What is the trait of It absorbs (takes on) moisture
a hygroscopic lu-
bricant?
6. What is temper- Temp. blend is the difference between the dew point and the bubble point
ature glide and
what type of blend
won't have it?
7. Dew Point Occurs when saturation temp in evaporator causes refrigerant to change from
liquid to vapor
8. Bubble Point Occurs when saturation temp in condenser changes refrigerant from vapor to
liquid
, HVAC: EPA 608 Certification Study Guide
Study online at https://quizlet.com/_28enbv
9. Will the gases in a No because different refrigerants in blend have different vapor pressures,
ternary blend leak causing them to leak at uneven rates
at the same rate?
Why or why not?
10. Refrigeration transfer of heat from one place to another
Process
11. Evaporator Absorbs heat into system from space to be cooled. Absorption of heat causes
refrigerant to boil. Upon leaving, refrigerant changed to low pressure, low
temperature vapor
12. Compressor Takes low pressure, low temp vapor and changes it to a high-temp, high-pres-
sure, superheated vapor and delivers it to the condenser
13. Condenser Rejects heat from system and changes refrigerant from high-temp, high-pres-
sure vapor into high-pressure, high-temp liquid
14. Metering Device reduces pressure of refrigerant and changes the high-pressure, high-temp
liquid into low pressure, low temp liquid.
15. Compound Gauge Typically blue and measures low pressure (psig) and vacuum (inHg).
16. High Pressure Red and measures high side (discharge) pressure. 0 to 500 psi
Gauge
17. What does a com- Vapor
pressor compress?
18. Why will refrig- Because of the vapor pressure difference between refrigerant and oil
erant migrate to
the crankcase in a
compressor?
, HVAC: EPA 608 Certification Study Guide
Study online at https://quizlet.com/_28enbv
19. What color is Red
the high pressure
gauge?
20. What color is Blue
the low pressure
gauge?
21. What needs to Triple evacuate system, install permanent filter-drier, conduct deep vacuum
happen if oil has before recharging
been contaminat-
ed by burnout?
22. What are three Rs Recover, recycle, reclaim
of refrigeration?
23. Recover to remove any refrigerant in any condition from system and store in external
container without necessarily testing or processing in any way
24. Recycle To clean refrigerant for immediate reuse by separating oil from refrigerant and
removing moisture and acidity from refrigerant by use of products like filter
driers
25. Reclaim To process refrigerant to level of new product specifications as determines by
chemical analysis
26. What standards EPA-approved equipment testing organization. Service aperture or process stub
must refrigerant
recovery equip-
ment meet and
what components
must all Type I and
