If you think the questions are slightly dubious on the online quiz find somebody who has access to the full version, the questions in that are really strange. I use the Refridiag program for teaching fault finding, that is brilliant and makes the students really have to think about what they need to check and how often you can diagnose the fault without fitting gauges. I will have my laptop with me on the stand at the RAC if anybody fancies a try.

Ian