R410A Certification Exam Questions
with Correct Verified Solutions 100%
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To avoid fractionation, blended refrigerants: - ANS ✓Should be charged
in the liquid phase
When charging an operating R410a system with liquid refrigerants: -
ANS ✓Be sure it is throttled into the low side to avoid compressor damage
The closer a blend comes to being a true azeotrope: - ANS ✓The less
temperature glide it will have
Cylinders containing R410a that are equipped with dip tubes: - ANS
✓To allow liquid to be removed with the cylinder upright
Temperature glide refers to: - ANS ✓A range of condensing and
evaporating temperatures for one pressure
When calculating subcooling with R407C: - ANS ✓Use the bubble point
value only
When calculating superheat with R407C: - ANS ✓Use the dew point
value only
R410a Certification
, 2
R410a
Systems containing R410a use _____ lubricant. - ANS ✓Polyol Ester
HCFC-22 is scheduled for total phaseout in the year: - ANS ✓2020
R410a is more efficient than R22, using less energy, therefor it has a
lower _____ - ANS ✓TEWI
Manufacturers of equipment using R410a have redesigned their
compressors: - ANS ✓With increased wall thickness
All service equipment used with R410a: - ANS ✓Must be rated for
higher pressures.
The cylinder color code for R410a is: - ANS ✓Rose
A full nitrogen cylinder has a pressure of approximately: - ANS ✓2500
psig
Nitrogen cylinders should only be moved: - ANS ✓With the protective
cap, and an approved cylinder cart
Before working on any electrical circuit: - ANS ✓Power should be shut
off, locked and tagged at the distribution panel
If a large leak of refrigerant occurs in an enclosed area, you should: -
ANS ✓Vacate and ventilate the area
R410a Certification
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