Yes, you can prevent others from using or seeing the tests or questions created by you. This you can do by publishing your tests as private. For publishing your tests as private, just follow these simple steps:

 
·         In the very first step of creating a test, we give an option to publish the test as 'Private’ or ‘Public’.

·         Choose 'Private' if you want your selected members to answer this test.

·         Add questions to the test and publish it.

·         Now, invite your contacts on WizIQ or on webmail accounts to take this test by using the Share feature. Only those members who have been invited are able to answer the test.