Is it permitted to perform an emergency brake for any reason other than to prevent a road accident?

Yes, for brake-testing, provided that it does not disturb or endanger any other road user.

Yes, in a paved road only, at a distance of 200 meters from buildings.

Yes, after signaling a distress sign to the vehicle behind you.

Yes, in a dirt road only, at a distance of 200 meters from buildings.