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

Quiz for Verb: 'To Crack'

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

'Crack up' - Have bad reception on a mobile phone





'Crack down on' - Use more authority than usual





'Crack up' - Burst out laughing





'Crack up' - Have a nervous breakdown





'Crack on' - Continue doing something with energy





'Crack up' - Damage a car badly