Levels III and IV. This follow-up to the Level Il guide is ideal for National Institute for Certification in Engineering Technologies (NICET) exam candidates moving to the next level or managers seeking a benchmark to assess job competence, salary levels, or training needs. Based on general and special work element descriptions for NICET Levels III and IV, this guide outlines the relevant Instrumentation Engineering Technology exams. It includes program overview, objectives, sample NICET exam-type questions with solutions, tips on exam preparation, and references for further study. Prerequisites: NICET Level II certification or equivalent knowledge of instrumentation fundamentals. Contents include Communications Troubleshooting Equipment System Operating Procedures Safety Process Diagrams Analyzers Fluids Multivariable Control and Tuning Control Valve Selection and Sizing Advanced Flow Measurement and Hardware Installation of Primary Devices, Advanced Digital Circuits Smart Transmitters Self-Tuning Controllers Planning and Scheduling Test and Maintenance Procedures and Diagnostics.