the mobile relays are different from industrial but logic remains you should which are normally open and normally closed. wonder why they do alot of relay logic in a basic mobile installation test..
got basic and advanced in 2004 been Master since 2009. However i havent worked in the industry since 2012. Went and retook the master in 2013 when my initial expired for shits and giggles and passed. Debating recertifying next year