Valves

Let us know which you've thought of already, there's a poppet.
Del

Intake.

Exhaust.

Butterfly (choke), maybe.

I wish I knew there was a quiz today, I would have studied!

"please repply me when you know."

I'm still waiting for this guy I know to tell me. He's smart. Every time I have a test question that I don't know, he tells me the answer.

So, just wait here and I'll be back soon. Don't go away, OK.

I'll bring enough tin foil for both of us.