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R-410A safety & Training Exam Questions and Answers 2024
- Exam (elaborations) • 6 pages • 2024
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- R245,70
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Recovery cylinders used with R-410A must have a DOT rating of: - either "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 increased volume of the sight glass. Who is correct? - Technician B only 
 
When charging a R-410A system that uses a thermostatic expansion valve, proper charge can be...
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