Safety Enginering & Risk management Experience in PTDF?

pls i need some 1 that wrote PTDFs safety engineering and risk management exams in the past ?
I ve noticed that people hardly have past questions & hence can help when pple ask for it.
But u ve wats even more important-ur experience.
pls hint me on the areas I shld concentrate, materials i could use to prepare.
some challenges......anytin at all would be appreciated.
I need guidance fro safety engineering and risk management.
thank u.
my email add is [email protected]
08181802996