A(n) ______ timer relay starts its timer after the pushbutton input has been released.

• A. On-delay
• B. Immediate
• C. Pulse
• D. Off-delay

Answer: (D)

Timing behavior in timer relays is defined by when the countdown begins relative to the control input. An off-delay timer starts counting after the input is released, so you can energize the circuit with a pushbutton, release it, and then the timer begins its countdown. The output will stay in its previous state for the duration of that delay and only switch after the preset time has elapsed. This matches the described scenario where timing begins after the pushbutton is released.

In contrast, an on-delay timer starts counting when the input goes on (the button press), an immediate timer begins timing as soon as power or the input is applied, and a pulse timer generates a fixed-duration pulse in response to an input transition rather than simply delaying after release.