UNIVERSAL R-410A EXAM 2024/2025
WITH 100% ACCURATE SOLUTIONS
Polyolester (POE) oils stored in plastic containers will:
-Separate
-Become more alkaline
-Become acidic
-Absorb moisture through the plastic - Precise Answer ✔✔Absorb moisture through the plastic
R-407C has:
-A foul odor
-To be charged in the vapor phase
-The ability to fractionate
-No temperature glide - Precise Answer ✔✔The ability to fractionate
A condensing unit designed for use with R-22:
-Must be replaced with a model designed for use with R-410A
-Cannot withstand the higher pressure of R-410A
-Both A and B
-None of the above - Precise Answer ✔✔Both A and B
In a refrigeration system, oil and refrigerant:
-Contain alkybenzene
, -Mix with each other
-Do not touch each other
-Are not miscible - Precise Answer ✔✔Mix with each other
Removal of refrigerant from a system can be accomplished by these two basic methods:
-Condensation and evaporation
-Dew point and bubble point
-Superheating and subcooling
-Active and passive - Precise Answer ✔✔Active and passive
Ozone depletion is caused by:
-HFCs
-Chlorine and Bromine
-R-410A refrigerants
-All of the above - Precise Answer ✔✔Chlorine and Bromine
The cylinder code for R-407C is:
-Medium Brown (Chocolate)
-Light green
-Rose
-Light blue - Precise Answer ✔✔Medium Brown (Chocolate)
The receiver bypass:
-Prevents subcooled vapor from sitting in the receiver and losing its subcooling
-Prevents superheated liquid from sitting in the receiver and losing its superheat
WITH 100% ACCURATE SOLUTIONS
Polyolester (POE) oils stored in plastic containers will:
-Separate
-Become more alkaline
-Become acidic
-Absorb moisture through the plastic - Precise Answer ✔✔Absorb moisture through the plastic
R-407C has:
-A foul odor
-To be charged in the vapor phase
-The ability to fractionate
-No temperature glide - Precise Answer ✔✔The ability to fractionate
A condensing unit designed for use with R-22:
-Must be replaced with a model designed for use with R-410A
-Cannot withstand the higher pressure of R-410A
-Both A and B
-None of the above - Precise Answer ✔✔Both A and B
In a refrigeration system, oil and refrigerant:
-Contain alkybenzene
, -Mix with each other
-Do not touch each other
-Are not miscible - Precise Answer ✔✔Mix with each other
Removal of refrigerant from a system can be accomplished by these two basic methods:
-Condensation and evaporation
-Dew point and bubble point
-Superheating and subcooling
-Active and passive - Precise Answer ✔✔Active and passive
Ozone depletion is caused by:
-HFCs
-Chlorine and Bromine
-R-410A refrigerants
-All of the above - Precise Answer ✔✔Chlorine and Bromine
The cylinder code for R-407C is:
-Medium Brown (Chocolate)
-Light green
-Rose
-Light blue - Precise Answer ✔✔Medium Brown (Chocolate)
The receiver bypass:
-Prevents subcooled vapor from sitting in the receiver and losing its subcooling
-Prevents superheated liquid from sitting in the receiver and losing its superheat
