Referee, umpire, timekeeper, scorekeeper. Referee usually is the one that starts the jump ball.
metal and a little copper
In American sports, the referees usually wear black and white striped shirts. In the NBA, the officials wear grey shirts.
Technically a player can choose up to the number 99, however high uniform numbers are rarer as many players opt to choose lower numbers.
Usually, in higher class games (i.e. NBA, NCAA, etc.) there are three. In tourney games, there are three. In high school games and junior high games, there are most likely two.15 total2 sometimes 1
The official number of referees in an NBA game or collegiate basketball is 3. The referees are the officers in charge of a basketball game and the final decision lies within their power.
from 0 to 99
The League pays the salaries of the referees who work games in the NFL. The NFL Officials Union and the NFL agreed to an 8 year contract in 2012. The deal, the longest ever between the league and union, was brokered after the Refs went on strike and refused to work games in the 2012 season.
$10 for sideline referees and $15 for the center referee per game. That is how much they usually get paid. This is a vague answer. How much you get paid depends on your organization. The higher age group you do the more you get paid.
Officials are usually referred to as referees, however generally there is one lead referee and one or two umpires, depending on whether there is a two or three person crew. In the NBA, the lead official is called the crew chief and the other two officials are "referees
NBA players have to wear a uniform to be recognized as to what team they belong at. It would be harder to distinguish if a team is wearing different jerseys. It is also a pride of a team to have their own uniform.
In the NBA, there are 3 referees for each game.