Your horn should be used to: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question Your horn should be used to: Answers Keep other drivers away from you. Alert other drivers to your presence. Keep other drivers awake. Startle other drivers. Explanation Using your vehicle's horn is a way to tell other road users that you are nearby. However, because it could startle another driver and create danger, use your horn only when necessary. This questions appears in the following tests: Indiana Class B Knowledge Test