Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question How often must school buses be inspected? Answers Every four months Semi-annually Every three years Every five years Explanation School buses are among the vehicles that are required to undergo semi-annual safety inspections. Take a FREE Practice Test Now This questions appears in the following tests: Illinois Knowledge Test Class A ,