In a category that requires question to be moderated, any new questions will be in the unapproved status and need to be approved before being published.
There are two options when approving/disapproving questions:
All: all approved and unapproved questions are displayed and visible for all users.
Approved: only the approved questions are displayed while the unapproved questions are hidden.
If you select Approved, the Moderate Question function will determine the unapproved questions to display or not.
Approve/Disapprove a question
The first way
1. Right-click the question title, then select Edit from the drop-down menu to open the Edit form.
2. Select/Deselect the Approved checkbox.
The second way
1. Click 
on the Action bar to open the Manage Questions form.
2. Click 
or 
to disapprove or approve the question respectively.