Which of the following is a common sense electrical appliance use tip?

The choice emphasizing the importance of keeping hands and floor surfaces dry when operating electric tools is grounded in essential safety practices. Electricity and water are a dangerous combination; moisture can enhance conductivity, significantly increasing the risk of electric shock. Operating electric tools with dry hands prevents the possibility of electrical current passing through the body, which can result in serious injury or even fatality. Additionally, a dry floor surface reduces slipping hazards while using these tools, ensuring both electrical safety and personal safety while working.

The other options present unsafe practices: nailing cords to structures can damage the insulation and create potential hazards, leaving appliances plugged in could lead to unnecessary energy consumption or accidental electrical fires, and storing electrical equipment on wet surfaces increases the risk of electrical shock and damage to the equipment. Recognizing the importance of a dry environment is essential for the safe operation of electrical appliances.