Re: Confusion in terminology, 'Yes/No Questions'
It's not really a grammar explanation, but when I was being trained to interview people about their travel, we were simply told to avoid "closed questions" (those with a Yes/No answer) and only ask "open questions" (where Yes/No were not possible answers).
Those are the terms I've generally used to my students.
Here is an example of a poorly worded interview:
Did you travel here on your own today?
Did you travel here by plane?
Did you board the plane in Paris?
Did you pay for your ticket yourself?
Have you come here to work?
Here's how it should look:
Who did you travel with today?
No-one, I came here on my own.
How did you get here?
I came by plane.
Where did you board the aircraft.
In Rome. We stopped in Paris for an hour but I didn't get off the plane.
Who paid for your ticket?
I paid for it out of my savings.
What are you going to do in the UK?
I've come here on holiday and I'm going to visit my uncle.
Will you do anything else?
I might work in a bar for a couple of hours a night.
As far as English teaching is concerned, and as you can see, closed questions might be OK for beginners, simply to show understanding, but in order to progress with sentence constructions, open questions should be used as often as possible.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.