If the same questions were asked of the same employee group the result would be the same or similar.
Actually they might be quite different, depending on, e.g., the respondents, a time lag between surveys, and the psychometric properties of the questionnaire. However, as pointed out already it might be possible to find very similar items not only in other surveys but in academic journals, too, in which case
AFAIK one is allowed to use them freely for non-commercial purposes (as long as the source is cited correctly).
Sorry for the interjection from the other side of the globe, in doubt just disregard especially since IANAL (been in the quantitative social sciences for several years now, though, including developing and analyzing employee surveys for a consulting firm. If you feel I might be of any help, feel free to PM me).
All the best
ACF