Which of the following conditions can lead to dangerous electrical arcs?

Moisture on electrical components can indeed lead to dangerous electrical arcs. When moisture is present, it can form a conductive path on surfaces that are not intended to conduct electricity, allowing current to travel through unintended routes. This can create short circuits and lead to electrical arcing, which occurs when electricity jumps across gaps in a circuit. This phenomenon can produce high temperatures and even cause fires or equipment damage. Ensuring that electrical components are kept dry and free from moisture is critical to maintaining safety and preventing electrical hazards.