All created Questionnaires for Screening purposes can be shared with the Candidates via email.
Visit the Candidates module.
Open the Candidate profile with which you wish to share the Questionnaire. Under Send Request option, choose Questionnaire.
On clicking the Questionnaire option, it will open an email template, containing an option to choose from your stored Questionnaires.
You will also be able to see the email in the Sent folder of your email account.