Those quizes are fun but they do lose credibility for the questions that give answer options for aircraft that are the same externally or have differentiating features that are out of shot -the comments about the MD80 series and some 707 and Dc 8 models being good examples-also is there any way to tell a 747-100 from a 200 if the both have PW engines.
On the other hand some of the quizzes helpfully have a picture with the answer written on it -trident 1 trident 2 for example.
On a totally unrelated matter has any of us 'mature enthusiasts' watched Sky Channel 81 , Talking Pictures I think it is called. Has some classic and some cringeworthy British films from way back . There was a film last week about the Korean war with a bunch of very well known British faces fighting off the evil Chicoms or NKA in 'A Hill in Korea' with the aid of some bombing and straffing by US Navy Grumman Panthers (Straight wing jets) however no one on the production team seemed to know what a jet fighter sounded like and so they made it up and added a most bizarre noise like an empty food blender on high speed as they whizzed in to attack. Anyway there are several aviation related films which appear on it and might be of interest to those whose memories go back towards the days of black and white-apologies for the drift.
PB