Meo Class 4 Electrical Oral Questions And Answers May 2026

Why use a Megger instead of a Multimeter for insulation?

Weekly for unloaded battery starts and monthly for automatic start and hydraulic start functionality. Steering Gear Special Requirements Meo Class 4 Electrical Oral Questions And Answers

A Megger has a much higher range (typically up to 500V) necessary to detect insulation health that a standard multimeter cannot. Why use a Megger instead of a Multimeter for insulation

What are the typical trip values? Under-voltage: 30–50% of load. Reverse Power: Approximately 10% of load. Over-current: 150% of Full Load Current (FLC). Maintenance & Troubleshooting check oxygen content before entry

Safety is a critical "Function 3" topic for Class 4 candidates. Why are they provided?

Ensure proper ventilation, check oxygen content before entry, use correct PPE (rubber gloves), and strictly prohibit naked lamps or smoking due to hydrogen gas risk. How often is it tested?