First interview was with some one who really have no knowledge about plant or data center system I mean field of study I.e chemist working on construction of data centers.LoL First phone interview call 1- How does a steam boiler work 2 what kind of water treatment used 3-How to optimize these systems Completely related and unrelated questions taking into account I’m a mechanical engineer. No complains here. Nice interview. Second phone interview after like 2.5 weeks, then the guy is sick then pushed another week. Things happen I understand. Second Phone interview, this guy was on something for sure like 🙃. Be aware this is a plant engineer position in a data center: 1- How doe a GFCI outlet works 2- what a voltage leading current circuit called 3-How does a VFD works 4- if you take an amp reading on one leg of a 3 phase motor and if u combined all three wires together and clamped them what are those readings LoL who the F would combine 3 wires. 5-what’s the out put signal of PLC called 6-if u have a blown fuse what’s and u took a voltage readings across when u have power, what would that reading be. 7- what’s the control voltage out of flow meter to connect to a PLC 8- if u have a 480v 3 phase with neutral leg and u measured between what is that voltage and Why 9- can we have VSD on 120v motor