Is it true that for a team requesting a time-out in a set after it has taken its allotted time-outs, unnecessary delay shall be charged?

When a team requests a time-out after exhausting its allotted time-outs during a set, it is considered a situation of unnecessary delay. This is because teams are only permitted a specific number of time-outs throughout a set according to the rules of volleyball. If they seek to take an additional time-out, it interrupts the flow of the game, and as a result, an official can charge the team with unnecessary delay. This penalty serves to maintain the pace and continuity of the match. Thus, the statement in the question is accurate: unnecessary delay is charged if a team requests a time-out after having already used its allowed number.