During the inspection, what should be checked regarding the vehicle's horn?

The requirement that the horn must be operable and loud enough to be heard is crucial for vehicle safety. The horn serves as a vital communication tool on the road, alerting other drivers, pedestrians, and cyclists of a vehicle's presence or intention to take action. If the horn is inoperable or too quiet, it may not effectively signal to others, increasing the risk of accidents.

Additionally, vehicle inspection standards are designed to ensure all safety features function properly. A horn that is not operational fails to meet the requirements for vehicle safety inspection. Hence, the emphasis is on both functionality and audibility to enhance safety for all road users.