Possibly in Indian English it would be considered to be correct, but in conventional British and American English, a past participle in the future tense, “will be started,” would not be used in this case.
The sentence would be said as: “My exam will [start][take place] tomorrow.”
gagamitin ko lang yang will be started kapag sa una palang sisimulan. kagaya nang projects na sisimulan. or kung sa mga bagay na de makina or electronics.