"Grandmother is promoted to engineer by the queen."
Translation:Nenek diangkat menjadi insinyur oleh ratu.
In this case, 'diangkat menjadi' that means 'to be promoted to' is like a phrasal verb in English. When we are using the word 'diangkat' as separated word, it will mean 'to be lifted up'. 'to become' has been literally represented by the word 'to' in this English sentence. There are many kinds of word that are using '[di-verb] + menjadi'
Anyway, we can use 'dipromosikan menjadi' as well which has the same meaning.