No. Fieldwork course CPT cannot be a standalone course in the final term.  

No, you must take this course for a letter grade.

No, you cannot.

You will receive an email reminder at the beginning of each semester, including the summer semester, with specific instructions on the application materials. You may only register for the course after you have met with a Career Adviser and received approval after review of all your appropriate paperwork.

All registered students are required to work at least 100 hours during the semester. If you are an (F1) international student, the Curricular Practical Training work authorization allows you to work up to 20 hours per week during the semester. Only during the summer,  you are allowed to work more than 20 hours a week.