Cast of 'Station 19' Answers A Fire Safety Quiz | Station 19 

I know I wasn't the only one that noticed that! It's that device that beeps if firefighter is down too long. I remembered it from the episode when ripley died so now I was super confused too at that answer?

@@katjak3376 yeah.. it stands for Personal Alert Safety System

My initial thought was for the PASS safety device as well... but they're referring to the mnemonic for how to use a fire extinguisher.

The question was referring to the method of using a fire extinguishers.r

I think the PASS stands for Pull, Aim, Squeeze, Sweep for a Fire Exstinguisher, think about it, pull the pin out of the lock, aim where you want to douse the fire, squeese the nozzle to activate the foam or liquid from the extinguisher and sweep to get the fire out efffectly and efficiently.