I have an interview with a company for a electrical maintenance position they said there will be a written test that they allow an hour for. It will probably have to do with machine schematics and plc i think. any advice.

study up on "motor control troubleshooting, power factor correction, and the 'Ohms Law Wheel', especially the formulas for wattage and current". this stuff seems to be a major portion of many of the tests given these days. also, i've seen questions concerning "polarization index, surge testing, meggers", and even "take-up" allowances, when bending stub 90's!

good luck!....