Hey,
There's always a scope for improvement.

Mock tests help to understand our weak points, gives confidence while attempting the tests. You should give mock tests in every 2-3 days, you should also analyze the mock test otherwise it will be useless. There are many web portal and apps which helps you to try free mock tests. They assist you in finding your weak points and then turning the weakness into strength is your key work.

BITS Pilani releases mock test for candidates who are appearing for BITSAT examination. Here is the complete information about mock test released by BITS: https://engineering.careers360.com/articles/bitsat-mock-test

Also, you can try the mock test of various institutes:

1. Allen Career Institute

2. Embibe

3. Tcyonline

4. Askiitians

Hope for the Best!