ELECTRO 3 Midterm Summative Exam

What is the primary function of the Ship's Main Switchboard (MSB)?

• To power critical systems during blackouts

• To connect the ship to port electricity only

• To synchronize multiple generators

• To distribute power from generators to all shipboard systems

Which component of the MSB is responsible for matching voltage, frequency, and phase before connecting multiple generators?

• A. Synchronizing Panel

• B. Feeder Panels

• C. Circuit Breakers

• D. Protection Devices

Which switchboard type is specifically designed to maintain power to critical systems during a blackout?

• Emergency Switchboard

• Main Switchboard

• Generator Paralleling Panel

• Shore Power Switchboard

Protection devices in the MSB serve what primary function?

• Provide overload, short-circuit, and earth fault protection

• Control generator synchronization

• Direct power to various ship systems

• Display voltage and current readings

The feeder panels in an MSB are responsible for:

• Directing power to specific ship systems

• Conducting power through the main busbars

• Synchronizing multiple generators

• Monitoring generator parameters

Circuit breakers in the MSB are analogous to:

• Traffic lights that stop overloads

• Customs gates for external power

• Weather monitoring instruments

• Runways for power distribution

The Shore Power Switchboard's primary function is to:

• Connect ship to port electricity safely

• Power emergency systems

• Monitor generator parameters

• Synchronize multiple generators

What is the primary purpose of cascade protection in shipboard electrical systems?

• To reduce the number of protection devices needed

• To shut down all circuits simultaneously during a fault

• To increase power consumption efficiency

• To isolate only the faulty circuit while maintaining operation of healthy circuits

Which term is also used to describe cascade protection?

• System isolation

• Power distribution

• Circuit breaking

• Preferential tripping

What happens if lower-level protection devices fail in a cascade system?

• Auxiliary power systems activate

• The fault remains unprotected

• Higher-level breakers will trip

• The entire system shuts down immediately