Which practice is not appropriate during a dryer exhaust cleaning?

• A. Disassembling the system without following safety procedures.
• B. Working with power connected while using insulated tools.
• C. Passing tools through an open, energized circuit.
• D. Wearing PPE and following safety procedures.

Answer: (C)

During dryer exhaust cleaning, the safe approach is to treat electrical systems as de-energized and to work only in a controlled, isolated state. Passing tools through an open, energized circuit creates a live path for current, which poses serious risks of electric shock and arc flash, and can ignite lint or cause damage if the tool or wiring faults. It also may energize other parts unexpectedly, endangering you and anyone nearby. The correct practice is to disconnect power, apply lockout/tagout, verify the circuit is de-energized, and then use proper PPE. Wearing PPE and following safety procedures is the correct approach, while disassembling without safety procedures or working with power connected using insulated tools are unsafe.