Don't feel bad. Not your fault. It's the changing of the times. use to be almost every 'self respecting' high school had 'Auto Shop' classes. My high school's class was considered to be one of the best in all of San Francisco. But 'something happened on the way from that place'. I own and operate the oldest 'Motorcycle Tire, and Modification Center' in California - (if not ((THE)) entire country. In the last few years we have been having problems hiring 'mechanics', I refuse to use the modern term 'techs'. (I'm old school, and funny that way). I went to my old high school to see if any one there would like to work as a 'mechanic'. I didn't even have to go inside. Driving by, (through the windows) , I saw all our old automotive equipment, workbenches and 'lifts' had been replaced by desks, with computers on them. I guess it made sense, as "the times,they are - a- changin", (a 1964 Bob Dylan song) Sure I get that - but we can not find anyone, (man or woman), willing to even get their hands dirty - Let alone knowing the basics of 'internal combustion' engines. So, no - there is no such thing as a 'stupid question'. And you are not stupid, ignorant, or 'dumb'. We are only products of our our own 'life experiences'. I do not know what a 'future' world will be like, with millions of 'computer techs', but very few ACTUAL mechanics. I guess (for some) chang is not always a good thing?