I know this is not rocket science to most of you but I am taking my grade 1 clarinet in a couple of weeks. I have to be able to tap out the pulse and say whether it is 2 or 3.
I can tap it out but haven a clue as to whether its a 2 or a 3.
Can anybody help.

The examiner will emphasise the first beat of the bar, probably much more than someone would normally, playing a piece. Listen out for that, and when you're clapping, try to emphasise it as well. Get your teacher to practise these with you, I'm sure that will help.

Godd luck for your exam!