Sending a questionnaire most of the times require a bunch of other documents or certificates to be sent along.
You can attach as many files as necessary, regardless if they live in the platform or your desktop.
From the Email Questionnaire window, press Add File:
A new window with the available certificates and documents will let you select which ones you wish to attach to the emailed questionnaire . Select by ticking off and press Attach at the bottom.
In case the required document does not exist in the Certificate and Documents module, click on Add new Document and browse on your desktop to locate the required file.