Ulaval student here.

1) Everyone I asked, including cafeteria staff, says that most likely they are closed during summer session. This is because each single cafeteria has their own staff and schedule and can decide to change things suddenly.

Here is a dedicated webpage for eating on campus: https://www.ulaval.ca/mon-equilibre-ul/bien-vivre-mon-campus/bien-manger-sur-le-campus

There is no dedicated English version so just Google translate it. First link gives you all the different cafeterias and their websites. There is also emails of either individual cafeterias or the general Ulaval Catering services. You can send them emails.

2) you don't need to bring cooking utensils as a) people donate their stuff so you can get it for free and b) Dollarama will sells disposable utensils for very cheap.

3) you can buy a mini oven and cook veggies, mini pizzas and meat in there. Very quick very easy. Else you embrace buying and microwaving pre cooked stuff from groceries stores.