168. As shown in figure «C» of the illustration, what type of timer is represented

The diagram illustrates the output activating only after a preset time following the input's activation, which is characteristic of an on-delay timer. This timer initiates timing upon input energization, activating the output after the preset time elapses, without delaying the output's deactivation when the input de-energizes. Other timer types, such as off-delay, on-off delay, and pulse timers, exhibit different timing behaviors not reflected in the diagram.