What sign indicates a malfunctioning receptacle?

• A. Cool to the touch
• B. Consistent brightness when powered
• C. Burning smell or discoloration
• D. Firmly holds all plugs

Answer: (C)

A burning smell or discoloration is a significant indicator of a malfunctioning receptacle. This sign suggests that there may be overheating within the electrical components, which could lead to potential failures or even fire hazards. Over time, wear and tear or poor connections can cause excessive heat output, resulting in insulation melting or components burning, which can be detected through a noticeable odor or discoloration around the receptacle. Recognizing these signs early can prevent serious electrical hazards and ensure the safety of the electrical system in a residential setting.

The other options do not suggest a malfunction. For example, a receptacle that is cool to the touch indicates that it is likely functioning as intended, and consistent brightness when powered suggests proper electrical flow. A receptacle that firmly holds all plugs indicates good mechanical integrity, which is also a sign of normal operation. Therefore, the presence of a burning smell or discoloration stands out as a crucial warning sign of an electrical issue.