Quizzes

[Emmanella]

When does the quizzes comes on?

 

[tedmc]

The sentence would be correct if you change "quizzes" to singular, and "comes" to "come".

 

[GoesStation]

When does the quizzes comes on?

What question are you asking? Please use different words to tell us.

 

[Charlie Bernstein]

When does the quiz come on?

Or. When do the quizzes come on?

Welcome, Emmanella!

What quiz (or quizzes)?

 

[emsr2d2]

The question is grammatical but I can't think of a context in which I would use it.

What time does the quiz start? (This would work at a pub, for example, while waiting for the pub quiz to start.)
What time is the quiz [show] on? (This would work if you were talking about a TV show.)
When is the quiz? (This would work as a general question to which the answer would be something like "Thursday evenings".)