Since I've never heard of this, I reached out to a friend of mine who works in Houston for McKinsey, which I believe is your target consulting company.
Contrary to what indicated in other answers here, he said that this is a technical role that is different from the general consulting role and therefore questions will be mostly technical and on market/industry knowledge. Therefore not case interview as much.
That said, this is second hand knowledge and from only one source, so would verify it (I will follow up to this if I hear from someone else)
Hope it helps,