As the subject says, should I admit to being polygraphed before upon taking a second PG? If I don't admit to it, is there anyway that they could still find out?
Fireinthenole,
You are persistent in learning how to avoid being honest during any part of your employment process. To answer your question, yes, it is discoverable that you have taken a polygraph examination for a different department. I will not elaborate on "how" it is discoverable, most departments do not use the information from a previous polygraph to disqualify you, they conduct their own.