Yes, you may apply for change of status from a B-2 tourist visa to another nonimmigrant category provided you can prove that you had no preconceived intent to change status. If you intend to change status to F-1, M-1 or J-1 , you must state your intent while applying for the B-2 visa.
Can I study or work on US tourist visa?
No, you may not study or work on US tourist visa. The consulate, however, may permit you to participate in a short-term training or a company course, provided your sponsoring company takes care of the expenses.
Are there any travel restrictions on B-2 visa?
If you have a multiple entry visa, there are no restrictions on the number of times you may travel in and out of the U.S. on that B-2 visa. You can stay out of the U.S. as long as you want and re-enter the U.S. before your B-2 visa expires.
Can I bring my dependents on B-2 visa?
Yes, you may bring members of your or your spouses' immediate family or your relatives to stay along with you. You may also bring a domestic or personal servant on nonimmigrant status, provided you can show that:
He or she is not abandoning his or her residence in the home country
He or she has worked for you for at least one year, or has had an ongoing employment relationship with you, and has at least one year of experience as a domestic servant
Note: Each person traveling must qualify for B-2 visa and obtain his/her own visa.