I recently went on a job interview for a position of HR assistant. During the interview, the HR manager explained the duties required for the position. Just when he finished explaining, he said, "Oh, one more thing: cleaning of the kitchen should be done once a week, including the microwave and the refrigerator. The HR assistant always had this duty."
This killed the interview for me. I was stunned because this was a fairly well-known company with 50 employees at that office. Thankfully, they did not offer me the job.
My question to you is: in a job interview, what can I ask to find out if the employer expects me to do a duty that has no connection to the job that I want? I know that I was lucky last time because the employer volunteered the information.
It's not unusual for fairly low-level positions to include some miscellaneous duties like this (particularly for a job like HR assistant, since in a lot of offices HR -- rightly or wrongly -- gets a lot of random office work, like organizing the holiday party and so forth). Other entry-level-ish positions might include similar things unrelated to the core job -- such as going to the post office or ordering the office's Wednesday morning bagels or whatever other miscellanea isn't a natural fit with anyone else's job.
I suppose that to get at this, you could try saying something like, "I know jobs at this level often include additional miscellaneous work too. Can you tell me what other types of tasks might fall to this person?"
But even then, it's likely that you could still end up being asked to do something they didn't mention in the interview or job description, either because they didn't think to mention something minor or because it's something that wasn't easy to foresee popping up.
Or you might end up with no jobs you're willing to do, because this is often the nature of jobs at or near entry level. It's one of the reasons people talk about "paying their dues" before they moved up.
I don't know that it's realistic to assume you can get around that at this stage in your career (I'm assuming here that the jobs you're targeting are all at the approximate level of an HR assistant). That's not to say that every single entry-level job has this component, because of course some don't, but it's common enough that you really risk coming across as naive and entitled to employers if you make a big deal about it.
But if you're good at what you do, this problem will solve itself in a couple of years because you'll get promoted out of those jobs and into roles where your boss isn't going to want someone at your salary level cleaning the microwave.