Answer:
Preventive maintenance is the practice of performing regular checks and repairs on equipment and systems to prevent breakdowns and failures. Preventive maintenance can improve the performance, reliability, and safety of the equipment and systems, as well as reduce the costs and risks of unexpected downtime and damage. Some examples of preventive maintenance are:
Changing the oil and filters of a car engine
Cleaning and lubricating the moving parts of a machine
Replacing the batteries and testing the alarms of a smoke detector
Updating the software and antivirus of a computer
Inspecting and repairing the roof and gutters of a house
You can learn more about preventive maintenance from these sources:
[What is Preventive Maintenance?]
[Preventive Maintenance 101]
[Preventive Maintenance: Meaning, Objectives and Applications]