Is it a good step to take a gap of 1 year for the preparation of JEE MAINS,if i have a score less than my expectations?

Self-assessment is the best thing to do before you decide to drop a year and start your preparation for JEE Main 2018.

According to you, the JEE Main score are not as per your expectations. It would be good that you devise a clear cut strategy from the word go, devise a time table, books that you have to study, the topics that are most important, important , and less important in each subject.

Make sure you have clear conceptual clarity. By now I am sure you must have been able to identify  your weak areas. Start working towards rectifying your weak areas. Identify your strength and convert your weakness into your strong times.

There is a saying that "Practice makes a man perfect " Once you have studied your course thoroughly as per the syllabus of JEE Main 2017, after that start solving previous years question papers and start taking as many mock tests as possible.

All this will enable you to achieve your goal of getting the desired JEE Main score, the branch and the stream in which you wish top take admission.

In the end I just have to say one thing, remain focussed and I am sure you will come out in flying colours.

Sure. Go Ahead and take a break. The thing is this time you have to make it count. If you fail to deliver the goods this time, too, then that is where the problem is. If you have complete faith in yourself and know that you will put in the effort with consistency for one complete year without losing sight of your objective, I suggest you give it a try. Then again you don't want to take a rash decision so talk to all your friends and family about what they suggest and then just go for it full throttle. All the best.