Neex Clarification about rule under Spending Momentum

Hi all. On Page 151 of the Core Book, under ‘Spending Momentum’, it reads, “Unless otherwise stated, each use of Momentum…can only be used once on any single skill test.” Can I get clarification on this? Does it mean I can only use one kind of momentum spend per roll, (Like once I spend for extra dice on a roll I cant then use extra momentum generated to obtain more infirmation), or that once I decide the amount of dice Im buying on that spend ( 1 extra die instead of 2 or 3) I cant add more?

You’re ok in that regard as the rule is more about what you apply to the roll.
So you can use Momentum to do one type of thing to help you succeed, but after the roll is complete you are free to spend momentum, such as to gather information.