"Is this going to work?"
Translation:Ceci va-t-il marcher ?
I think he might be referring to the use of "marcher" for "to work" or "to function" as possibly being idiomatic. At least that's what I came into the comments looking to clarify.
No problems with it if so, just something I hadn't yet seen. I got the sentence construction completely correct (to my surprise) but didn't know what verb to put where "marcher" apparently goes. My Spanish background made me stick "servir" in there, but I don't think that verb is quite as versatile in French as it is in Spanish.
It doesn't have a meaning. It's necessary to insert it between "va" and "il" to stop two consecutive vowels.
"Vais-je manger ?" - "Am I going to eat?"
"Vas-tu manger ?" - Are you going to eat?"
"Va-t-il manger ?" - "Is he/it going to eat?"
"Va-t-elle manger ?" - "Is she/it going to eat?"
"Va-t-on manger ?" - "Are we going to eat?"
"Allons-nous manger ?" - "Are we going to eat?"
"Allez-vous manger ?" - "Are you going to eat?"
"Vont-ils manger ? - "Are they going to eat?"
"Vont-elles manger ?" - "Are they going to eat?"
In answer to questions about why travailer is incorrect, here travailler is more along the lines of work as in a job or a task eg. "Is this going to be performing a duty" whereas 'marcher' means more "Is this going to function (or succeed)?" In English work means both, but from what I understand in French the words aren't so interchangeable. So "Ceci va-t-il travailler" would ask if the thing was in the process of doing a job but without necessarily implying any success. The English phrase "Is this going to work?" is synonymous with "Is this going to succeed?"
I wrote "Est-ce que ceci va reussir" (I forgot the accent in "réussir") and it was marked wrong (if it was just a missing accent I would have been marked right). It said I should use "marcher" instead. I would definitely use "marcher" if I was talking about repairing a clock, but if I was talking about a plan I feel that "réussir" would work better.
"Is this clock going to function?" - "Is this going to work?" vs. "Is this plan going to succeed?" - "Is this going to work?"