This depends upon the game being played - in Straight Pool it is possible to score 14 points on one shot.
The highest score available in a single shot is a score of 10.
No, if your score is zero and you play a foul shot your opponent gains points.
The only way is if you pot 12 reds at once. Anything else would be a foul shot.
It is possible to get a higher score than 147 but that is the highest break possible. A foul shot from your opponent in which you are awarded points is technically not part of your break.
You cannot; the highest you can score is a 3-pointer.
Quite simply a shot.
The highest break in a snooker match is 155. To get this break your opposition must foul and leave a "free ball" or her shot immediately before the break began. The player can then pot the free ball worth 1 point, follow it with a black worth 7, and then complete a standard 147 break by potting 15 reds, 15 blacks and all the colours. So their initial 8 points of the break and the 147 of the rest of the break gives 155.
Scoring is not an issue in pool, therefore there is no "highest" break. In that particular form of billiards, the break is the action of taking the first shot and splitting up the racked bals. You may be confused with snooker: in this, the highest break possible is 147 points (all reds with blacks, then all colours).
15 - if you hit the white and it pots all 15 reds. Any other shot would be a foul.