It's all Geek to me. Gan canny pet.I thought that was where you were already. The speak another language in your parts, don't they?

I get to stay after all. (I failed miserably when I tried one of the old tests).It has been an officially acceptable name for the flag since 1908 according to the Flag Institute: LinkWe should deport the one who wrote the quiz!
The Union Jack, is by definition only when flown from the jackstay of a Naval ship. Even when flown elsewhere on a ship it is the Union Flag which is the correct answer
Although by lazy colloquialism the two are becoming synonymous such sloppiness should not be allowed in these tests