Export to copy, maximum execution time

I have a test too long, 2,500 questions.  when I use the button Export to copy, I get this error

Fatal error: Maximum execution time of 30 seconds exceeded in /home/foropir/public_html/wp-content/plugins/watupro/controllers/import-export.php on line 27

I can modify those 30 seconds to put 100 seconds?, where?

I have a test so long because I use it as database questions.

Then another test is 50 random questions from the test database, test 100 random questions database, etc.