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Worksheetselectro final exam
Total questions: 5
Worksheet time: 3mins
In a ship’s electrical distribution system, what is the primary purpose of protective devices like circuit breakers, fuses, and relays? (Remembering)
To regulate electrical frequency
To protect against equipment damage and ensure crew safety
To prevent excessive power generation
2. Which protective device onboard a vessel is designed to automatically disconnect power in the event of an overcurrent fault? (Remembering)
Circuit breaker
Transformer
Motor starter
During a fuse performance test in a ship’s generator panel, what is being assessed? (Understanding)
Its ability to withstand power surges caused by load fluctuations
Its ability to safely interrupt fault currents in the circuit
Its compatibility with other electrical components
Why is it essential to conduct performance testing on relays used in the main switchboard of a vessel? (Understanding)
To ensure timely activation during faults and prevent equipment damage
To test insulation strength in high-voltage circuits
To confirm the electrical panel's cooling efficiency
Which of the following performance tests on a marine circuit breaker evaluates its ability to handle short-circuits caused by seawater ingress? (Applying)
Dielectric withstand test
Short-circuit interruption test
Thermal stability test
