OIT Operator-in-Training VIP Certification Exam

OIT — The Operator-in-Training (OIT) certification is issued by state environmental and water/wastewater licensing boards (often using exams developed by the Association of Boards of Certification, ABC) and is required for individuals actively working toward a Grade 1 or higher Water/Wastewater Treatment Plant Operator license; most state exams consist of 50–100 questions with a 70% passing threshold and a 2–3 hour time limit.