How to setup an auto-submit timer.

this has 50 questions

Review and Submit button

5 timers after every 10 questions

If you want to auto-submit the form right after time runs out, you can use the following widget: https://widgets.jotform.com/widget/global_countdown 

If you need to add a widget to your form, please check this guide: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-Your-Form