Depending on the iPerceptions plan to which you are currently subscribed, you will be able to create a number of different custom questions for your survey. "Custom" questions are considered the ones that you create by using the "Add Question" menu provided.
Please find below the number of custom questions that you can create based on the iPerceptions plan to which you are currently subscribed:
iPerceptions Free: 2
iPerceptions Plus: 5
iPerceptions Premium: 10
iPerceptions Professional: Unlimited
Click here to learn more about adding a new question to your survey