Safety and Regulations Flashcards
7 cards from real 313D practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety and Regulations flashcards as text
Under EPA Section 608, which refrigerant recovery technique is required when the compressor is inoperative?
Answer: Push-pull recovery
Push-pull recovery uses both the recovery machine inlet and outlet to maximize refrigerant removal when the system compressor cannot assist.
What is the maximum allowable leak rate for a comfort cooling appliance containing 50 or more pounds of refrigerant before repair is required?
Answer: 10% per year
EPA regulations set the leak rate threshold for comfort cooling appliances at 10% of charge per year, above which the owner must repair the leak.
Which OSHA standard governs lockout/tagout procedures for HVAC technicians working on energized equipment?
Answer: 29 CFR 1910.147
29 CFR 1910.147 is the OSHA Control of Hazardous Energy (Lockout/Tagout) standard that applies to servicing and maintenance of equipment.
A technician discovers a system using R-22. Under current EPA rules, what refrigerant options exist for topping off this system?
Answer: Reclaimed R-22 or approved substitute refrigerants
As of 2020, only reclaimed or recycled R-22 may be used for servicing existing R-22 systems; virgin R-22 production has been phased out.
When working with refrigerants, safety data sheets (SDS) must be available to employees under which OSHA standard?
Answer: 29 CFR 1910.1200
OSHA's Hazard Communication Standard (29 CFR 1910.1200) requires employers to maintain SDS for all hazardous chemicals, including refrigerants.
What minimum concentration of oxygen in air is considered acceptable for safe entry into a confined space?
Answer: 19.5%
OSHA defines an oxygen-deficient atmosphere as one with less than 19.5% oxygen, making 19.5% the minimum acceptable level for safe entry.
Which document must an HVAC technician have to legally purchase refrigerants regulated under EPA Section 608?
Answer: An EPA Section 608 technician certification
EPA Section 608 requires technicians who purchase refrigerants in containers larger than 2 lbs to hold a valid Section 608 certification.