Missouri Permit Test 2 Question During a written exam: Answers Cell phones may be placed on airplane mode. Cell phones must be turned off. Cell phones may be left on, but must be set in a face down position. Cell phones may be left on. Explanation All electronic devices must be turned off while a written exam is being taken. Answer Statistics 3.65 % of our users get this question wrong. This questions is relatively Easy. Missouri Permit Test This questions appears in the following tests: Illinois Knowledge Test Class A , Tennessee Knowledge Test Class B ,