English question, please help?

Yes, it can. But only when it's an auxiliary verb in interrogatives, like in all your examples. (All of your examples are correct, by the way.)

You'll also see 'does' contracted with other interrogative adverbs, like 'how':
How's it work? = How does it work?
Where's it come from? Where does it come from?

Remember, however, that this contraction is informal and colloquial. In formal English (for example, if you're writing a letter or an essay), you should always use 'does' in its full, non-contracted form. But in every day conversation, the contraction to 's' is fine.

Good luck.

In N Z you no doubt have a couple of expressions which aren't heard in different places, no longer even in Australia. I am southern English, however used to be in Oz for 3 years within the early Nineteen Seventies. Visited N Z round Auckland for a couple of hours at the approach dwelling from Oz by means of sea. But then, what's "English" English or British English? As some distance as I am involved the North (of England) is an extra nation for language!