Hello Student
The class hours and timings of Khalsa College BBA 1st yr is within 9AM to 6 PM.But like a school hours you have not to continue your class during whole of the day.You have to follow the class routine as it is scheduled for BBA 1st yr classes as the class hours alloted .To know specifically you may contact with the administrative stuff of the college at college hours on any working day.You may contact with any alumni of the college to know the  specific timing of the class hours of BBA 1st yr.
Hope this will help.