You are the one guilty of confusing people. This is the second thread where you have wrongly stated that flying schools issue visas.
Flying schools dont issue visas. Get it? Thats the job of the visa sections in the US embassies/consulates.
Even if you have been issued with the appropriate paperwork to apply for any visa, you can still be turned down by the Visa section.
By the time you get your hands on a visa you will likely have coughed up between $200 and $250 depending on the charges from the training establishment.
I take it you have not been through the process of getting a visa otherwise you would be better informed.