RSES Safety Procedures 5

Question 1

Which OSHA standard specifically addresses the hazard communication requirements for chemicals, including refrigerants, in the workplace?

Accepted Answer

OSHA 29 CFR 1910.1200 (Hazard Communication Standard / HazCom)

Answer

OSHA's Hazard Communication Standard (29 CFR 1910.1200) requires Safety Data Sheets (SDS), labeling, and employee training for all hazardous chemicals including refrigerants.

Question 2

When should a technician replace a refrigerant system's fusible plug?

Accepted Answer

If it has actuated (melted/vented), if it shows corrosion, or at manufacturer-recommended intervals

Answer

A fusible plug that has actuated, corroded, or reached its service life must be replaced to maintain overpressure protection; an actuated plug cannot reseal.

Question 3

A refrigeration system uses an A2L classified refrigerant such as R-32 or R-454B. What additional safety precaution is required compared to A1 refrigerants?

Accepted Answer

Ignition source controls, leak detection systems, and A2L-rated equipment are required due to mild flammability

Answer

A2L refrigerants have mild flammability (lower flammability limit > 3.5%) and require ignition source management, compatible equipment, and often leak detection per codes and equipment listings.

Question 4

What is the correct action if a technician accidentally inhales a significant concentration of non-toxic but oxygen-displacing refrigerant vapor?

Accepted Answer

Immediately move to fresh air and seek medical attention if symptoms persist

Answer

Moving to fresh air immediately restores oxygen supply; symptoms of hypoxia (dizziness, confusion) may persist and require medical evaluation to ensure full recovery.

Question 5

Prior to cutting into a refrigerant line on an unknown system, what safety step is essential to verify before starting?

Accepted Answer

Verify system pressure is at atmospheric (0 psig) and refrigerant has been fully recovered

Answer

Cutting into a pressurized or refrigerant-charged line is extremely dangerous; verifying zero pressure and complete refrigerant recovery prevents sudden refrigerant release and injury.

(RSES) Refrigeration Service Engineers Society Certification Practice Test

(RSES) Refrigeration Service Engineers Society Certification Practice Test

RSES Safety Procedures 5