Which of the following is NOT a characteristic of blow holes?

Blow holes are specific signs that can be found in fire investigations, particularly in scenarios involving electrical malfunctions. These holes are created by a rapid energy release during a fire, which leads to significant heat and potential charring of the materials involved. Therefore, stating that they do not indicate minor charring is accurate because blow holes are actually indicative of more severe conditions, such as significant energy release that occurs during an electrical malfunction.

When analyzing the characteristics of blow holes, it’s essential to consider their context within a fire scene. They are a byproduct of intense heat and energy and often suggest that the circuit involved may have experienced an overload or failure, resulting in the potential for further electrical issues. This aligns with the role of indicators like blow holes in forensic fire analysis, making the correct identification crucial for understanding the cause and origin of a fire.