Abstract: Fragments of the module of the knowledge base of the expert system containing data on measuring apparatuses and controllable geometrical parametres for the various process equipment and the employee for training and testing of knowledge of the user by separate kinds of geodetic works and chosen measuring apparatuses are described. For working out of the knowledge base of expert system the tool СLIPS environment which functionality has been expanded by means of working out of special program application CLIPS-mod was used