Who should perform maintenance of teaching aid devices?

• A. Teachers
• B. Janitorial staff
• C. Only qualified repair personnel
• D. Students

Answer: (C)

Maintenance of teaching aid devices must be performed by qualified repair personnel. These devices often involve electrical and mechanical systems that require specialized knowledge to inspect, repair, calibrate, and test safely. Having trained personnel ensures the equipment functions correctly, reduces the risk of electrical shock or other hazards, and keeps demonstrations accurate and safe. Teachers and students use the devices but do not perform the servicing, and janitorial staff handle cleaning rather than technical maintenance. Only someone with appropriate training and authorization should service such equipment.