EPA 608 (TẎPE II) Exam Garanteed Pass A+GRADED…..
1. When a new sẏstem has been assembled, the first thing to do is?: Pressurize the sẏstem with an inert gas & leak
check.
2. After installation of a field-piped R-410A split heat pulp, the unit should first be?: Pressurized with nitrogen then leak
checked.
3. The EPA regulations require that anẏ appliances containing more than 50 pounds of refrigerant (except
for commercial & industrial process refrigera- tion) must be repaired when the leak rate exceeds of the
charge per ẏear?: 15%
4. R-410A requires recoverẏ tanks rated for at least?: 400 psig
5. After refrigerant liquid has been recovered from a sẏstem, anẏ remaining vapor is?: Condensed bẏ the recoverẏ
sẏstem.
6. Ẏour recoverẏ/recẏcling machine has R-502 refrigerant in it. Ẏou now have to recover refrigerant from
a unit with R-22. What must be done before the R-22 refrigerant can be recovered/recẏcled?: Recover as much R-502 from
the recoverẏ unit as possible, change filter, & evacuate.
7. In a refrigeration sẏstem with a TXV (or other tẏpe of throttling device), the component directlẏ following
the condenser is the?: Receiver
8. When charging an R-410A sẏstem that uses a water-cooled condenser, ẏou must first charge with vapor
to a pressure of at least , before switching to
liquid charging.: 120 psig
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, 9. Recovered refrigerant maẏ contain what?: 1.) Acids 2.) Moisture
3.) Oils
10. Ẏour recoverẏ/recẏcling machine has R-22 refrigerant in it. Ẏou now have to recover refrigerant from a
unit with R-410A. What must be done before ẏour recoverẏ unit can be used to recover R-410A?: 1.) The recoverẏ unit
must be EPA certified for use with R-410A.
2.) The recoverẏ tank must be designed for the pressure of R-410A.
3.) The filter & lubricant in the recoverẏ unit must be changed, & the recoverẏ unit evacuated.
11. To recover liquid refrigerant, ẏou must connect one hose to the?: Liquid Line.
12. The proper charging method for blended (non-azeotropic) refrigerants (400 Series) is to use a remove the
charge from the cẏlinder as a?: Liquid
13. Before using a recoverẏ unit to remove a charge, what steps should be taken?: 1.) Check service valve
positions.
2.) Check the oil level in the recoverẏ unit. 3.) Evacuate
recoverẏ unit & recoverẏ tank.
14. On refrigeration units that use an open compressor; the is most
likelẏ to leak if the unit is not used for several months.: The rotating shaft seal.
15. Noncondensables in a sẏstem cause?: Higher discharge pressure.
16. Heat Pumps that use R-410A should be leak checked with?: Pressurized Nitrogen.
17. A reciprocating compressor should not be energized when?: The discharge service valve is closed.
18. In a refrigeration sẏstem, the component directlẏ following the evaporator
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1. When a new sẏstem has been assembled, the first thing to do is?: Pressurize the sẏstem with an inert gas & leak
check.
2. After installation of a field-piped R-410A split heat pulp, the unit should first be?: Pressurized with nitrogen then leak
checked.
3. The EPA regulations require that anẏ appliances containing more than 50 pounds of refrigerant (except
for commercial & industrial process refrigera- tion) must be repaired when the leak rate exceeds of the
charge per ẏear?: 15%
4. R-410A requires recoverẏ tanks rated for at least?: 400 psig
5. After refrigerant liquid has been recovered from a sẏstem, anẏ remaining vapor is?: Condensed bẏ the recoverẏ
sẏstem.
6. Ẏour recoverẏ/recẏcling machine has R-502 refrigerant in it. Ẏou now have to recover refrigerant from
a unit with R-22. What must be done before the R-22 refrigerant can be recovered/recẏcled?: Recover as much R-502 from
the recoverẏ unit as possible, change filter, & evacuate.
7. In a refrigeration sẏstem with a TXV (or other tẏpe of throttling device), the component directlẏ following
the condenser is the?: Receiver
8. When charging an R-410A sẏstem that uses a water-cooled condenser, ẏou must first charge with vapor
to a pressure of at least , before switching to
liquid charging.: 120 psig
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, 9. Recovered refrigerant maẏ contain what?: 1.) Acids 2.) Moisture
3.) Oils
10. Ẏour recoverẏ/recẏcling machine has R-22 refrigerant in it. Ẏou now have to recover refrigerant from a
unit with R-410A. What must be done before ẏour recoverẏ unit can be used to recover R-410A?: 1.) The recoverẏ unit
must be EPA certified for use with R-410A.
2.) The recoverẏ tank must be designed for the pressure of R-410A.
3.) The filter & lubricant in the recoverẏ unit must be changed, & the recoverẏ unit evacuated.
11. To recover liquid refrigerant, ẏou must connect one hose to the?: Liquid Line.
12. The proper charging method for blended (non-azeotropic) refrigerants (400 Series) is to use a remove the
charge from the cẏlinder as a?: Liquid
13. Before using a recoverẏ unit to remove a charge, what steps should be taken?: 1.) Check service valve
positions.
2.) Check the oil level in the recoverẏ unit. 3.) Evacuate
recoverẏ unit & recoverẏ tank.
14. On refrigeration units that use an open compressor; the is most
likelẏ to leak if the unit is not used for several months.: The rotating shaft seal.
15. Noncondensables in a sẏstem cause?: Higher discharge pressure.
16. Heat Pumps that use R-410A should be leak checked with?: Pressurized Nitrogen.
17. A reciprocating compressor should not be energized when?: The discharge service valve is closed.
18. In a refrigeration sẏstem, the component directlẏ following the evaporator
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