What are the four basic timing functions available on solid-state timers?

The response identifying the four basic timing functions available on solid-state timers as on-delay, off-delay, one-shot, and recycle is correct because these functions cover the fundamental operations that solid-state timers are designed to perform in various control applications.

On-delay timing allows a delay before the output is energized after the trigger is applied. Off-delay timing is the opposite; it allows an output to stay energized for a predetermined time after the trigger is removed. One-shot timing generates a single pulse of a defined duration in response to a trigger signal, effectively sending a brief signal regardless of how long the trigger is active. Lastly, recycle timing allows the timer to repeat a cycle of on and off states at specified intervals, which is crucial in applications where regular cycling is necessary for proper operation.

While the other choices contain terms like synchronous and dashpot, these terms do not accurately represent the basic functional categories commonly associated with solid-state timers. Synchronous typically refers to operations based on a clock signal, and dashpot is more related to mechanical timing devices rather than the digital context of solid-state technology. Therefore, the inclusion of recycle alongside the other primary timing functions makes this choice the most representative of solid-state timer capabilities.