If you are detained for the semester examination, then you have to apply for clearing the semester in your next year. But if you are allowed to sit for the next semester examination isn't provided clearly on the Maharastra Technical Education board website. SO it would be better, if you can contact the officials of your college and get it discussed, they will guide you regarding the procedure.

Sorry for your inconvenience!

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https://engineering.careers360.com/articles/polytechnic

I hope this answer helps. All the very best for your future endeavors!