Refrigerant 410A Certification Exam
Questions with Correct Verified
Answers Latest Update (2024/2025)
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A full nitrogen cylinder has a pressure approx.: - ANS ✔2500 psig
A leak detector capable of sensing _____ is needed when working with
R-410a. - ANS ✔HFC
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? - ANS ✔Technician B only
A true azeotropic blend: - ANS ✔will not fractionate
All service equipment used with R-410a - ANS ✔Must be rated for the
higher pressures
Because of its higher vapor capacity, the discharge temperature of R-
410a is _____ than R-22. - ANS ✔Lower
Refrigerant 410A Certification
, 2
Refrigerant
Before working on any electrical circuit: - ANS ✔Power should be shut
off, locked and tagged at the distribution panel
Blends that have fractionated, depending on the constituent make-up,
may become; - ANS ✔None of the above
Both suction and discharge pressure of R-410a systems are _____ than
R-22 systems. - ANS ✔40% to 70% higher
Compression ratio is calculated as: - ANS ✔Absolute discharge pressure
divided by absolute suction pressure
Compressor internal pressure relief (IPR) setting for R-410a systems
are: - ANS ✔550 psig to 625 psig
Cylinders containing R-410a that are equipped with dip tubes, - ANS
✔Allow liquid to be removed with the cylinder upright
HCFC-22 is scheduled for total phaseout in the year - ANS ✔2020
If a large leak of refrigerant occurs in an enclosed area, you should: -
ANS ✔Vacate and ventilate the area
If a R-410a system develops a leak: - ANS ✔The remaining refrigerant is
OK to use because R-410a has a low fractionation rate
Manifold high side gauge for R-410a refrigerant must range to - ANS
✔800 psig
Refrigerant 410A Certification
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