Without the proper amount of oil in its engine: Question Without the proper amount of oil in its engine: Answers A vehicle will have difficulty stopping. A vehicle will make quick, jerking movements while being driven. The engine may be quickly damaged. Explanation It is essential that a vehicle's engine have adequate oil pressure. An engine can be destroyed rapidly if it is run without oil. This questions appears in the following tests: Alaska Class A Knowledge Test Idaho Class B Knowledge Test Iowa Class B Knowledge Test New Hampshire Class A Knowledge Test New Mexico Class A Knowledge Test New Mexico Class A Knowledge Test Tennessee Class A Knowledge Test