What kind of work experience is required to get admission in USA for pursuing MBA?

There are no specifics here. Work experience can be varied, infact applicants from different backgrounds are accepted. It can be a bank job, programming, cashier and so on. Whatever your work is you must have demonstrated enough leadership skills, have taken initiatives etc and have contributed sign

Minimum 3 years of full-time experience. A Bachelor's degree or equivalent. GMAT GRE or pass an admissions test. International study or work experience.