An on-delay timer relay's contacts will not change states until ...

• A. Immediately
• B. A predetermined time has elapsed
• C. When power is removed
• D. At a system reset

Answer: (B)

An on-delay timer relay changes its output after a set period has passed once the control input is energized. The coil starts timing as soon as power is applied, and the contacts remain in their initial state during that countdown. Only after the preset interval elapses do the contacts switch. This delay is what makes the timer useful for letting a process run for a specific amount of time before continuing. It isn’t immediate, it isn’t tied to removing power, and it isn’t tied to a system reset—the key behavior is that a predetermined time must pass before the state changes.