The following rules apply:
At oral exams with a duration of max. two hours, the internal examiner takes care of water/coffee/tea for herself/himself and the external examiner.
At oral exams with a duration of more than two hours, the study supporter responsible orders water/coffee/tea for the internal and external examiner from the canteen in the S building, and the internal examiner picks it up before the exam. The water will be in bottles.
If the exam has a duration of several hours and/or takes place during lunchtime, the study supporter responsible orders lunch from the canteen in the S building, and the internal and external examiner pick it up in the canteen, and lunch can then be eaten in the exam room, the canteen in the S building or in our lunch-room Valhalla. The internal examiner takes care of returning the pots and possible tableware to the canteen/cleaning tables.
As to exam signs to put on the door at oral exams, study supporters can provide either a file for you to print or a sign can be picked up at their office in Buliding S, fourth floor.