The timeout timer on tests is set to 30 minutes. If you are taking a test and are inactive for more than 30 minutes the test session will expire and you will have to start again. However, if you are inactive for 29 minutes and then answer a question the 30 minute timer starts over again.
A popup warning message will appear at 25 minutes, and if no activity occurs before 30 minutes is reached the session will time out.
Note: If the session times out the course or exam progress may not be saved.