How Many Exams are there in NEBOSH IGC course? NEBOSH International General Certificate in Occupational Health and Safety have three exams; each exam has 100 marks. Two exams out of three exams are written which conduct through the British Council. Candidate must score 45% Marks to pass the written exam within two hours. Third exams is a practical assessment written report which must be prepared by the candidate within the chosen workplace. To pass third exams candidate must score 60% marks.