Arc-flash is defined as a dangerous condition associated with the possible release of energy caused by an electric arc.

• A. Arc-blast
• B. Arc
• C. Short circuit
• D. Arc-flash

Answer: (D)

An arc-flash is the dangerous energy release that occurs when an electric arc forms. The statement describes a hazardous condition tied to energy being released due to an arc, which is exactly what arc-flash means. An arc is simply the conductive channel of ionized gas; arc-blast would emphasize the accompanying pressure wave but isn’t the standard term for the energy-release hazard described. A short circuit is the fault condition that can produce an arc, but it refers to abnormal current flow rather than the specific energy release hazard. So, the description aligns with arc-flash—the hazardous energy release from an electric arc.