you are allowed as many as you like as long as the ball hits the net and lands in the square.
There isn't a limit on lets in table tennis. There are also no penalties for lets in table tennis. A player can let as many times as he wants.
2 bounces are allowed in any wheelchair tennis match
Yes... each time the ball hits the net, on serve, and hits the other side, it is a let.
urm.........not really sure
None. If you foul serve, you lose the point.
Yes, the tennis ball is only allowed to bounce once.