To safeguard essential machinery (like steering gear) by automatically disconnecting non-essential services (like AC or galley power) during a partial overload.
Accept the alarm and isolate breakers one by one to locate the source. Common causes include damaged conductor insulation, dampness, or accumulated dirt. What tasks are performed?
What safety measures are mandatory?
Cleaning air filters, removing dust from the rotor, checking the air gap (typically 1.5 to 2 mm) with a feeler gauge, and inspecting slip rings and carbon brushes. Safety & Regulations
MEO Class 4 Electrical Oral exams primarily test a candidate's practical knowledge of shipboard electrical systems, safety protocols, and troubleshooting procedures. This guide compiles essential questions and answers derived from official Maritime and Mercantile Department (MMD) interview formats. Core Electrical Systems Meo Class 4 Electrical Oral Questions And Answers
Ensure the coupling isn't misaligned and the pump isn't obstructed. Earth Fault Alarms: What is your immediate action?
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 To safeguard essential machinery (like steering gear) by
Practical scenarios often focus on what to do when things go wrong in the engine room. What are your primary checks?
