Is 'To Double' Separable or Inseparable? - Phrasal Verb Quiz

Quiz for Verb: 'To Double'

Is the phrasal verb 'To Double' separable or inseparable in the following examples?

'Double up' - Share accommodation because there are too many people





'Double up' - Bend over at the waist





'Double over' - Bend over at the waist





'Double as' - Have a second function or purpose





'Double up as' - Have a second function or purpose





'Double back' - Go back the way you were coming