CRST Safety Procedures & Environmental Regulations 5 — Questions and Answers
Question 1: Which OSHA standard specifically governs process safety management (PSM) for facilities using large quantities of ammonia refrigerant?
- OSHA 29 CFR 1910.119 (Correct answer)
- OSHA 29 CFR 1910.147
- OSHA 29 CFR 1910.132
- OSHA 29 CFR 1910.1000
Correct answer: OSHA 29 CFR 1910.119
OSHA's PSM standard (29 CFR 1910.119) applies to facilities with 10,000 pounds or more of ammonia, requiring formal safety management programs.
Question 2: What is the correct response when a refrigerant electronic leak detector alarms in a mechanical room?
- Silence the alarm and continue working to locate the leak
- Immediately evacuate personnel, ventilate, and investigate per emergency procedures (Correct answer)
- Turn off refrigeration equipment and resume normal duties
- Log the event and schedule a leak check for the next service visit
Correct answer: Immediately evacuate personnel, ventilate, and investigate per emergency procedures
An alarming leak detector requires immediate evacuation of personnel, activation of ventilation, and investigation following the facility's emergency response procedures.
Question 3: What refrigerant recovery requirement applies to small appliances (systems containing 5 pounds or less of refrigerant)?
- Full evacuation to 4 inches Hg vacuum before opening
- Recovery of at least 80% of the refrigerant using certified equipment
- No recovery required if the refrigerant is an HFC
- Recovery using self-contained recovery equipment to EPA standards (Correct answer)
Correct answer: Recovery using self-contained recovery equipment to EPA standards
Small appliances require refrigerant recovery using EPA-approved self-contained recovery equipment, though specific vacuum levels differ from larger systems.
Question 4: When performing lockout/tagout (LOTO) on a refrigeration system, which energy sources must be controlled?
- Electrical power only
- Electrical and mechanical energy only
- All energy sources including electrical, pressure, thermal, and gravitational (Correct answer)
- Refrigerant pressure only
Correct answer: All energy sources including electrical, pressure, thermal, and gravitational
OSHA's LOTO standard requires isolation and control of all hazardous energy sources, including electrical, pneumatic, hydraulic, thermal, chemical, and gravitational energy.
Question 5: What is the EPA's requirement regarding the sale of refrigerant to uncertified individuals?
- Refrigerant in any quantity may be sold to anyone
- Only refrigerant in containers of 2 pounds or less may be sold without certification verification (Correct answer)
- Refrigerant may only be sold to certified technicians regardless of container size
- Refrigerant sales are regulated by state law, not federal EPA rules
Correct answer: Only refrigerant in containers of 2 pounds or less may be sold without certification verification
EPA Section 608 allows refrigerant in containers of 2 pounds or less to be sold without certification, but containers larger than 2 pounds require buyer certification.
Question 6: A technician is replacing a compressor on an R-410A system. Which recovery equipment pressure rating is required for this refrigerant?
- Standard low-pressure recovery equipment rated to 50 psig
- High-pressure recovery equipment rated to at least 800 psig (Correct answer)
- Medium-pressure equipment rated to 300 psig
- Any recovery equipment since R-410A is non-toxic
Correct answer: High-pressure recovery equipment rated to at least 800 psig
R-410A operates at significantly higher pressures than older refrigerants, requiring recovery equipment rated for high-pressure service (typically 800 psig or higher).
Question 7: Under EPA's refrigerant management regulations, what must a technician do if a system they serviced leaks again within 30 days of repair?
- Immediately vent and decommission the system
- Notify the EPA within 24 hours
- Conduct another repair attempt and document the second repair (Correct answer)
- Refuse further service until the owner replaces the system
Correct answer: Conduct another repair attempt and document the second repair
If a repaired system leaks again within 30 days, technicians must perform another repair and maintain documentation showing continued good-faith efforts at compliance.
CRST Safety Procedures & Environmental Regulations 5
Which OSHA standard specifically governs process safety management (PSM) for facilities using large quantities of ammonia refrigerant?