Question To avoid carbon monoxide poisoning, drivers should: Answers Have their exhaust system checked regularly to be sure it does not leak. Keep their engine turned off when the car is in an enclosed garage. Close vents when following closely behind another car. All of the above. Explanation Carbon monoxide fumes are odorless and deadly. Symptoms of carbon monoxide poisoning are sudden weariness, yawning, dizziness, and nausea. The only cure is an adequate supply of fresh air. Pass your DMV Written Test with flying colors Take me to the cheat sheet New Jersey This questions appears in the following tests: New Jersey Practice Test 7 New Jersey Practice Test 18