With repeatable tables, you cannot change how many rows will appear by default from the Edit page, but you can use JavaScript to achieve the desired effect. On the CSS and JavaScript page, take note of the ID attribute for the table's add button.

Then you can add some JavaScript to simulate clicks on this button:

$(document).ready(function () {
for (i = 0; i < 2; i++) // to add more rows, set i < a bigger number
{
  $('#q2').trigger('click');
}
});

This is a good place to start, but you might want to play with it and add more code to make sure the behavior is what you anticipate (for example, ensuring the script doesn't keep adding rows through various user tasks).