Although I do not know anything about the Speech program at Texas Tech, I recently appeared for an interview via Skype for a grad. SLP program and I got to admit, the questions were very simple and straightforward.
More specifically,
1. Why Speech Language Pathology? (because I'm changing streams)
2. Why XXX College/University?
3. Why the grad. SLP program at XXX College/University? (kinda ties with the previous question)
4. How do you see yourself fit into the program followed up with how do you manage stress?
5. Any questions from my side.
Despite what you may hear from other folks or even posts on this forum about being confident and putting your game face on and what not lol, I think it helps to just be yourself and treat the interview like any other productive conversation.
If you have a story to tell or would want the committee to know something which you haven't mentioned in your SOP, take the time to do so!
Are you a guy entering SLP? If so, that's great! We don't have too many of us in this profession.
Best of Luck!!