K.V. Epifantsev, N.Yu. Efremov St. Petersburg State University of Aerospace Instrumentation, St. Petersburg, Russiaepifancew@gmail.com Al’manac of Modern Metrology № 2 (30) 2022, pages 117–126 Abstract. Nowadays, the demo exam is becoming a frequently used way to additionally test the knowledge of students in universities. However, due to a lack of time for preparation, and sometimes … Continue reading Features of the calibration of the contourograph and typical mistakes of students in preparation for the demo exam in the competence “Digital metrology”