Question Mirrors should be: Answers Checked only when changing lanes. Checked frequently. Checked only if there is a reason to suspect a problem. Explanation When driving, you should regularly check your mirrors, both to be aware of traffic and to check for problems on your own vehicle. Take a FREE Practice Test Now This questions appears in the following tests: Hawaii Knowledge Test Class A , Michigan Knowledge Test Class A , Iowa Knowledge Test Class B , Washington Knowledge Test Class B , Wyoming Knowledge Test Class B ,