In icy conditions, a retarder should be: Question In icy conditions, a retarder should be: Answers Turned on. Turned off. Only used on the rear wheels. Explanation A retarder may cause a skid when traction is poor, such as when a road is icy, and should therefore be turned off in such conditions. This questions appears in the following tests: Kentucky Class A Knowledge Test Kentucky Class B Knowledge Test Minnesota Double South Dakota Passenger Vermont Class A Knowledge Test
