Question for Canadian mechanics

Hi there,

I was working as a mechanical helper (as a graduate of Motive Power Technician earning Level One and Level Two Automotive Service Technician in-school apprenticeship training) for over 3 years working on a fleet of various diesel trucks and pick ups.

I worked on brakes, suspension, etc... under the guidance of both licensed 310s and 310t mechanics. During my time there, I thought of asking to be officially an apprentice and getting my hours checked proving i have done the jobs in the apprenticeship book. I wasn't sure if i wanted to pursue the mechanic trade. I wanted to just paid.

Now, i haven't been in the trade for 2 years now but, do hang around a friends shop helping out. I do want to go back to the trade acquiring 310t license working on fleet trucks again.

Can a person that worked as a mechanic helper who did not get signed up as an apprentice but, knows theory and experience backed by the shop challenge the exam? Or should i just go back to school?

Thanks!