What characterizes HCs as refrigerants?

Hydrocarbons (HCs) are characterized as refrigerants primarily due to their zero ozone depletion potential (ODP) and high flammability. The zero ODP indicates that these refrigerants do not contribute to the depletion of the ozone layer, making them environmentally friendly options when compared to some synthetic refrigerants.

Their high flammability is a significant characteristic, as hydrocarbons can ignite easily and require specific handling procedures in various applications to ensure safety. This flammability factor is critical for technicians to understand when working with systems that utilize HCs as refrigerants, ensuring that proper safety protocols are in place.

In contrast, other choices that mention low flammability or high toxicity do not accurately reflect the properties of HCs. Understanding the balance between their environmental benefits and safety considerations is essential for anyone working with these refrigerants.