Question Safety belts should be fastened: Answers Whenever you feel unsafe. Before the engine is started. After reaching speeds of 45 mph. Explanation Your safety belt should be fastened before the engine is started. Drivers are required by law to use their seat belts in a moving vehicle. Pass your DMV Written Test with flying colors Take me to the cheat sheet Arkansas This questions appears in the following tests: Arkansas Practice Test 7 Arkansas Practice Test 13