Final answer:
When noticing smoke in an office building, a security guard should first determine the origin of the smoke before taking any action. They should then pull the closest fire alarm to initiate the evacuation process and call the fire department for professional assistance.
Step-by-step explanation:
When on your patrols in an office building as a security guard, if you were to notice smoke, you should first determine the origin of the smoke before contacting anyone. This is important because identifying the source of the smoke can help assess the severity of the situation and determine the appropriate course of action. For example, if the smoke is coming from a small fire in a kitchen area, it may be possible to extinguish it using a fire extinguisher before it spreads.
If the smoke is significant and immediate action is needed, you should then pull the closest fire alarm to alert others in the building. This will initiate the evacuation process and notify the occupants to leave the building.
Once the alarm is activated, you should also call the fire department to report the situation and provide them with relevant information such as the location of the building and the source of the smoke. This will ensure that professional firefighters are dispatched to the scene to handle the situation.