The 'Q' was definitely not for question. The interrogative function was 'IMI' , transmitted as one symbol. The 'code' was simply a form of abbreviation since much communication was in Morse code and it helped to speed things up. Perhaps the classic illustration was one of the 'Qs' (long since forgotten) which meant something like -"Will you shine your searchlight on the clouds, occulting if possible, in order to ascertain the cloudbase and pointing in the direction of the prevailing wind or main swell direction" !!! QZR (or whatever it was) was a lot easier on the fingers
