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LOW GWP REFRIGERANT PRACTICE EXAM QUESTIONS WITH VERIFIED ANSWERS 2026

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LOW GWP REFRIGERANT PRACTICE EXAM QUESTIONS WITH VERIFIED ANSWERS 2026

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LOW GWP REFRIGERANT PRACTICE
EXAM QUESTIONS WITH VERIFIED
ANSWERS 2026




Refrigerants that have a lowercase designation, such as R-134a, indicates a(n):



Azeotrope blend.



Isomer.



Olefin.



Zeotropic blend. - correct-answer -Isomer.




Which of the following is classified as an A2L refrigerant?

,2|Page


R-290



R-441A



R-744



R-1234yf - correct-answer -R-1234yf




When using a flammable refrigerant as a trace gas for leak detection, the amount

must not exceed:



10% of the upper explosive limit (UEL) of the refrigerant..



25% of the lower flammability limit (LFL) of the refrigerant..



25% of the upper explosive limit (UEL) of the refrigerant.

, 3|Page


35% of the lower flammability limit (LFL) of the refrigerant. - correct-answer -25%

of the lower flammability limit (LFL) of the refrigerant..




Hydrogen fluoride (HF) can form when:



Any chlorine-containing refrigerant undergoes complete or incomplete

combustion or thermal decomposition.



Any chlorine-containing refrigerant undergoes fractionation.



Any fluorine-containing refrigerant undergoes complete or incomplete

combustion or thermal decomposition.



Any fluorine-containing refrigerant undergoes fractionation - correct-answer -Any

fluorine-containing refrigerant undergoes complete or incomplete combustion or

thermal decomposition.

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