Cement Mixer: What is "slump"?

I drive a cement mixer in Washington State. This concrete delivery uses a concrete pump truck to pour a new foundation. In this video I'll explain how to measure the consistency of concrete. Slump is the way we measure how wet, or dry, the load is in the cement mixer. ***Help me grow the channel by subscribing and sharing this video!! Got questions? Want to see something I didn't cover? Leave it in the comments and I'll try to make a video for it?