i think so
The clock is maintained by a certified NFL official. He or she takes cues to start and stop the clock from the referee.
No. Not in the NFL, only in college football
The NFL Play Clock is 35 seconds. The NBA Shot Clock is 24 seconds.
Yes, the officials move the chains and place the ball at the proper yard line for the next play and then the referee blows the whistle to start the clock again.
No, that rule has been in college football for a long time but has never been adopted by the NFL.
In college football, if a ball carrier gains a first down without running out of bounds, then the clock will start immediately. Running plays are often executed when a particular team wants to run down the clock if they are ahead.
No
1976
The game clock stops when a ball carrier goes out of bounds maintaining forward momentum. The game clock continues if the ball carrier's forward momentum is stopped in bounds before he goes out of bounds. For most of the game, the clock is restarted when the line judge resets the ball and whistles play to continue. The exception is in the last 2 minutes of the first half or the last 5 minutes of the second half. In those cases, the clock does not start again until the offense snaps the ball.
when they stop playing and retire
NFL - 60 minutes, 4 15-minute quarters.