As part of the vehicle inspection test, a CDL applicant will be asked to: Question As part of the vehicle inspection test, a CDL applicant will be asked to: Answers Check the engine oil level. Replace a tire. Remove the alternator belt. Explanation The vehicle inspection test will include a check of the oil level. You must show that it is within a safe operating range. This questions appears in the following tests: Louisiana Class A Knowledge Test Minnesota Passenger Oklahoma Class B Knowledge Test Oregon Class A Knowledge Test Vermont Passenger Virginia Tank