offshoreigor...
It's been awhile since I wrote the examination myself, but one of the areas that cause many candidates trouble are the performance chart questions.
In the exam, you are provided with several (I think there were 5 or 6) charts from an AFM (CL65 on my exam) that are associated with about 10 exam questions.
A flight dispatcher has to know 'almost'
as much about the aircraft and its performance capabilities and systems as the flight crew - after all, they're the ones that generate the flight plans and dispatch releases.
Here's a partial listing of the required aircraft specific topics that an air operators flight dispatcher training program must consist of for intial/annual training:
Aeroplanes
10.1 Hydraulics
10.2 Electrics
10.3 A/C and Pressurization
10.4 Emergency Equipment
10.5 De-Icing/Anti-icing Systems
10.6 Fire Detection Systems
10.7 Fuel Systems
10.8 Weight and Balance Control Procedures
10.9 Avionics
10.10 Aeroplane Performance (including wet, dry, and contaminated runways)
10.11 Aeroplane Performance Enroute
10.12 Aeroplane Type Transition Training (per type)