High-quality acts as a GPS. It tells you exactly where you are, how far you have to go, and which turns to take. Without it, you are driving blind with a generic roadmap.
Switch to Revision Guides and Flashcards . Focus on the "Action Verbs" and legal limits (e.g., noise exposure limits: 80dB action value, 87dB exposure limit). Use the Pro-forma answer sheets to simulate exam conditions. nebosh course material