Safety Practices & Regulatory Compliance Flashcards
7 cards from real RSES 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 Practices & Regulatory Compliance flashcards as text
What is the safe oxygen level range for a technician working in a confined space with refrigerant present?
Answer: 19.5% to 23.5%
OSHA requires atmospheric oxygen concentration in confined spaces to be between 19.5% and 23.5%; below 19.5% is oxygen-deficient and above 23.5% is oxygen-enriched.
Under EPA Section 608, refrigerant sales of CFC and HCFC refrigerants in containers larger than 2 lbs are restricted to:
Answer: Technicians certified under Section 608
EPA 608 restricts the purchase of CFC and HCFC refrigerants in containers larger than 2 lbs to certified technicians or persons working under their direct supervision.
What is the function of a 'fusible plug' on a refrigerant cylinder?
Answer: It melts at a specific temperature to relieve pressure before cylinder rupture
A fusible plug is a pressure-relief device filled with a low-melting alloy that melts at elevated temperatures, venting the cylinder before pressure causes catastrophic failure.
Which refrigerant class poses the greatest immediate danger of chemical burns and respiratory damage at low concentrations?
Answer: Natural refrigerants — ammonia (R-717)
Ammonia (R-717) is immediately dangerous to life and health (IDLH) at 300 ppm and can cause severe burns to eyes, skin, and respiratory tract at relatively low concentrations.
A technician discovers a system has been charged with an unknown refrigerant blend. What is the safest course of action?
Answer: Recover the entire charge without mixing, label the cylinder 'unknown mixture', and have it analyzed
Unknown blends must be fully recovered into a dedicated cylinder labeled 'unknown mixture' and sent for analysis; mixing refrigerants is prohibited and creates hazardous conditions.
What does the Montreal Protocol primarily regulate?
Answer: The production and consumption of ozone-depleting substances
The Montreal Protocol is an international treaty that phases out the production and consumption of substances that deplete the stratospheric ozone layer, including CFCs and HCFCs.
When must a refrigerant leak inspection report be filed with the EPA for a comfort cooling appliance?
Answer: When a system with a charge of 50 lbs or more has a leak rate exceeding 10% per year
Under EPA 608, systems with a full charge of 50 lbs or more that exceed the applicable leak rate threshold for comfort cooling (10% annually) require leak inspection and repair records.