No Examiner shall inquire into any of the following areas during pre-employment or periodic employment examinations, unless the area is directly related to employment:
         (1) Religious beliefs or affiliations;
         (2) Beliefs or opinions regarding racial matters;
         (3) Political beliefs or affiliations;
         (4) Beliefs, affiliations or lawful activities
    
regarding unions or labor organizations; or
        (5) Sexual preferences or activity.