Which scenario best describes a situation where a fire extinguisher would be necessary?

The scenario that describes a situation where a fire extinguisher would be necessary involves detecting smoke and minimal flames in a wastebasket. This situation presents an immediate fire hazard that could escalate if not addressed quickly. Fire extinguishers are designed to control or extinguish small fires, and prompt action is crucial in preventing the fire from spreading and causing more significant damage or injury.

In the context of workplace safety, using a fire extinguisher can be essential for safeguarding both personnel and property. The presence of minimal flames indicates that the fire is still manageable; therefore, having a fire extinguisher available and being trained to use it can effectively resolve this emergency.

Other scenarios presented do not involve any fire risk or urgency that would require the use of a fire extinguisher. Finding a gadget not working or an employee leaving for lunch does not pose any fire-related danger. Similarly, a minor malfunction with no one present indicates a lack of immediate risk, allowing for further evaluation or maintenance at a later time without the need for fire extinguishing equipment.