You may not consume alcohol within ____ of going on duty. Do you currently have car insurance? Insurance is mandatory to drive in Virginia Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question You may not consume alcohol within ____ of going on duty. Answers One hour Two hours Four hours Explanation Commercial vehicle drivers are prohibited from consuming any intoxicating beverage, regardless of its alcohol content, within four hours of going on duty. This questions appears in the following tests: California Class A Knowledge Test California Class B Knowledge Test