What is chassis dynamometer and why it is used? All Questions › Category: Automotive Electronics › What is chassis dynamometer and why it is used? 0 Vote Up Vote Down chetan shidling asked 5 years ago I need short information. 1 Answers 0 Vote Up Vote Down chetan shidling answered 5 years ago It is a test stand (chassis dynamometer) that holds a vehicle such a truck or car. It consists of instruments capable of measuring the power that is delivered at the drive wheels of the vehicle under various conditions(speed or load).