JEE Scores

Till now there is no need of the class 12th report card and when you need that till then it will be in your hand so don't worry and just focus on the JoSAA counselling.

To get an admission into Chandigarh University in mechanical engineering you should have a minimum of 60 percentage in 10+2 in a valid board. For further course details :
http://www.cuchd.in/engineering/be-mechanical-engineering.php.

Passed or appeared in 10+2 Science/equivalent with P.C.M. 45% marks in aggregate (Minimum requirement of 40% marks is applicable to reserve category candidate)
Course fee: 5 lakhs.
The JEE cut-off varies each year. You should obtain at least 75 or above.
Good luck.

As your score is too low, you cannot get admission here. You should try for other private college. There are so many college which provide good placements and education too. Good luck.

Yes, As your category is SC, so, it may be some hope to get admission in lower order NITs.

Yes, you will get the CSE in Apex Group of Institute.
But there are still very good colleges that you can get on your rank and marks basis.
If you are interested to find out the list of colleges that you can get on your rank basis then do click on the given link and watch it till the end.
https://youtu.be/hOlit6Un7l0
https://youtu.be/3YAzEP1vgvQ

SPA-Delhi only accepts JEE score and that too above 250.

Since you are from SC category, you can get a seat if you have a score of 100 and above in JEE Mains. I don't think it's good to drop a year.

No, you can't. They offer admission through NATA.

For qualifying JEE Mains (which means to be eligible for JEE Advanced) the minimum marks are as follows:
IN 2018:
Common Rank List - 74
OBC-NCL - 45
SC - 29
ST -24
IN 2017
Common Rank List-81
OBC-NCL- 49
SC - 32
ST - 27
Cutoffs for admissions in various NITs, IIITs, are available at:
https://josaa.nic.in/josaaorcrarchieve/Result/OpeningClosingRankArchieveN.aspx?Year=2017
Here you can see the cutoff's ranks for various categories.