Octavius is correct. You should have got the handbook sent to you/your company when the test was booked.
It's quite a simple test really - Just multiple choice questions - a lot of it is just plain common sense. However, you need to see the handbook.
There used to be a mock test online and I am still looking for it.
I did the mock demolition test for fun once and passed with flying colours and I don't know much about demolition.
http://www.cskills.org/supportbusiness/healths afety/test/takingthetest/index.aspx