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 A broken exhaust system: Answers Can allow poisonous fumes into the cab. Does not cause problems. Should not cause concern. Helps the vehicle run better. Explanation A broken exhaust system is extremely hazardous because it can permit poisonous fumes to enter the vehicle's cab or sleeper berth. Take a FREE Practice Test Now This questions appears in the following tests: Utah Knowledge Test Class A , New Hampshire Knowledge Test Class B ,