1.  R1 catches the opening at their own 7-yard line and makes a spectacular run. As they near the goalline, R1 turns and taunts the nearest pursuer. R1 scores, but before they cross the goalline, they are flagged for unsportsmanlike conduct.
a)  If the penalty is accepted, the touchdown is canceled. The penalty is enforced from the spot of the foul and team R begins a new series after enforcement.
b)  If the penalty is accepted, it may be enforced on the try or on the start of K's next possession from the 15-yard line.
c)  If the penalty is accepted, it must be enforced on the try.
d)  If the penalty is accepted, it must be enforced on the free kick after the try.

b)  Rule 10.4.1 states that the penalty for any live-ball unsportsmanlike conduct foul is administered from the succeeding spot, and rule 8.2.2.b gives the opponent of the fouling team the choice of enforcing the penalty on the try or on the subsequent possession following the try.

 

2.  3rd & 1 for team A at B's 8-yard line.  The pylon is properly placed.  A4's fumble in flight from the 5-yard line bounces off the pylon and lands in the field of play at B's 2-yard line.
a)  The ball remains live.
b)  The ball is dead; it will be first and 10 for team B from its 2-yard line.
c)  The ball is dead; it will be first and 10 for team A from its 5-yard line.
d)  The ball is dead; it will be first and 10 for team A from its 2-yard line.
e)  The ball is dead; it will be first and 10 for team B from its 15-yard line.

c)  The ball touching a properly placed pylon causes the ball to the out of bounds behind the goal line.  Rule 4.2.1.f.ii states that if "the ball is fumbled forward...it is spotted where the runner loses possession, including forward fumbles that touch the ground in the end zone or out of bounds behind the goal line."

3.  Second and 30 from team A's 30-yard line. A1's forward pass is grabbed near the sideline at team A's 40-yard line by airborne eligible A2, who jumps straight into the air. B3 then shoves A2 so they land out of bounds beyond team A's 42 yard-line.
a)  Its no catch.
b)  Its a catch if the covering official believes A2 would have landed inbounds without the contact.
c)  None of the options is correct.

b)  Rule 2.2.4 states that "if a player catches a pass and is pushed out-of-bounds, the pass is considered complete if an official judges that the player would have caught the ball in-bounds except for the pushing."

4.  The snap ends when:
a)  The ball touches the ground or is possessed by any player.
b)  The ball leaves the snapper's hand(s).
c)  The ball is moved from its place on the ground.
d)  None of the options is correct.

a)  Rule 2.11.2 defines that "the snap begins when the snapper first moves the ball legally other than an adjustment", and the "snap ends when the ball touches the ground or is possessed by any player."

5.  K1's kickoff hits the ground at team R's 25 yardline. R1 goes to one knee to field the ball.
a)  R1 may advance when they recover the ball, even though their knee is touching the ground when they gains possession.
b)  Even if R1 rises so their knee is off the ground when they gain possession, they may not advance because their knee was at one time on the ground.
c)  If the ball contacts R1, with their knee on the ground, the ball is dead the second it touches them.
d)  None of these statements is true.

d)  If the player possesses the ball with their knee on the ground, the ball becomes dead.  It does not become dead immediately if it merely touches a player whose knee is on the ground, but would become dead if it touches the ground after touching that player.  As long as the player's knee is not on the ground at the time they gain possession of the ball, they may advance.