Question To avoid carbon monoxide poisoning, drivers should: Answers Have their exhaust system checked regularly to be sure it does not leak. Keep their car turned off when it is enclosed in a 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 Texas This questions appears in the following tests: Texas Practice Test 26 Texas Practice Test 18