Refrigerant 410A Certification Exam:
Questions and Answers 2025|2026
Verified Graded A+ Already Passed!
Which of the following is true of R-407c? - correct answer-It is a good
choice of retrofitting an R-22 air conditioning system
Manifold high side gauge for R-410a refrigerant must range to - correct
answer-800 psig
Manifold low side gauge for R-410a refrigerant must range to - correct
answer-250 psig with 500 psig to 550 psig retard
Service hose used with R-410a equipment must be rated to - correct
answer-800 psig
, To remove moisture from polyol ester (POE lubricant. - correct answer-
Change filter/drier and evacuate to 500 microns
A leak detector capable of sensing _____ is needed when working with
R-410a. - correct answer-HFC
If a R-410a sytem develops a leak: - correct answer-The remaining
refrigerant is OK to use because R-410a has a low fractionation rate
Recovery cylinders used with R-410a must have a DOT rating of: -
correct answer-DOT 4BA 400 or DOT 4BW 400
A system using r-410a refrigerant has bubbles in the sight glass.
Technician A says that the system must be low on refrigerant.
Technician B says that the bubbles could be caused by the blended
refrigerant flashing in the increasing volume of the sight glass. Who is
correct? - correct answer-Technician B only
Questions and Answers 2025|2026
Verified Graded A+ Already Passed!
Which of the following is true of R-407c? - correct answer-It is a good
choice of retrofitting an R-22 air conditioning system
Manifold high side gauge for R-410a refrigerant must range to - correct
answer-800 psig
Manifold low side gauge for R-410a refrigerant must range to - correct
answer-250 psig with 500 psig to 550 psig retard
Service hose used with R-410a equipment must be rated to - correct
answer-800 psig
, To remove moisture from polyol ester (POE lubricant. - correct answer-
Change filter/drier and evacuate to 500 microns
A leak detector capable of sensing _____ is needed when working with
R-410a. - correct answer-HFC
If a R-410a sytem develops a leak: - correct answer-The remaining
refrigerant is OK to use because R-410a has a low fractionation rate
Recovery cylinders used with R-410a must have a DOT rating of: -
correct answer-DOT 4BA 400 or DOT 4BW 400
A system using r-410a refrigerant has bubbles in the sight glass.
Technician A says that the system must be low on refrigerant.
Technician B says that the bubbles could be caused by the blended
refrigerant flashing in the increasing volume of the sight glass. Who is
correct? - correct answer-Technician B only
