One outstanding site we have found that covers help for various disciplines of engineering is EngineeringForum.org.
Here are the current areas they focus on: Electrical engineering Mechanical Engineering Biomedical engineering Chemical engineering Structural engineering Environmental engineering Civil engineering Manufacturing engineering Aerospace engineering Automotive Engineering
Many students ask questions which are quickly answered by experienced engineers to help them decide on courses to take or if the carrier path they are taking is right for them.
Others find experienced help for their projects and help their company grow.
Some of the topics get very technical and are explained with math but this should help anyone interested in engineering grow their mind.
If you don't understand a topic, just ask someone to explain it in clearer terms and I'm sure they will take the time to help you understand any of the engineering topics being discussed