I ran across a "test your small engine knowledge" thing on yahoo today and thought wth and clicked on it. It is a poorly written, random question thing that some overeducated idiot put out there just to get clicks.
I think I scored 20 out of 30, because I knew the answer but didn't select the one they decided the correct answer was, or there was no right answer. the worst one of the bunch was "what does viscosity refer to?" their answer was thickness.
If you have not taken the test, DONT. you will be dumber after doing it.