Question As part of the vehicle inspection test, a CDL applicant may be asked to: Answers Check the engine oil level. Replace a tire. Remove the alternator belt. Replace spark plugs. Explanation While testing for a CDL, an applicant will be required to go through a full vehicle inspection. The vehicle inspection test will include an engine oil level check. This questions appears in the following tests: Georgia Passenger Minnesota Class B Knowledge Test Montana Class A Knowledge Test Montana Double Nevada Passenger Utah Class A Knowledge Test Wyoming Class B Knowledge Test