Some places to find a sample test for a chauffeur's license include TestPreview.com and INAllStarDrive.com, as of 2016. These practice test are available online for free.
TestPreview.com offers a practice test for a class D driver's license, which includes the chauffeur's license in most states. There are 15 multiple-choice questions that cover general knowledge. This isn't a state-specific test. It includes an answer key after all of the questions.
INAllStarDrive.com offers a driver's test that is specific to Indiana, but some of the questions are general knowledge questions that apply to most states, such as the best time to turn on headlights. There are 25 multiple-choice questions, and the test taker sees the scores after completing the practice test.