Revision of Fundamental of AC

Which of the following is the primary source of emergency power on most ships

• Solar panels

• Battery banks

• Diesel generators

• Wind turbines

In case of a blackout on a ship, what is the purpose of an emergency generator

• To power all non-essential systems

• To provide lighting and essential services

• To maintain air conditioning for passenger comfort

• To power the propulsion system temporarily

What is the typical location of emergency generator rooms on a ship

• Below the waterline

• At the stern

• Near the bridge

• Above deck

What is the purpose of an uninterruptible power supply (UPS) system on a ship

• To provide additional power during peak demand

• To supply power to critical loads during a brief interruption

• To reduce fuel consumption of main generators

• To regulate voltage for sensitive equipment

What safety measures are typically employed to ensure the proper functioning of emergency power systems on ships?

• Regular maintenance and testing

• Installing additional solar panels

• Using only renewable energy sources

• Disconnecting non-essential systems during emergencies

What is the primary function of a circuit breaker in a ship's power distribution system?

• To regulate voltage

• To prevent overload

• To generate electricity

• To control frequency

Which component in a circuit breaker detects an overcurrent/overload condition and triggers the tripping mechanism?

• Contacts

• Arc extinguisher

• Bimetallic Strip

• Magnetic coil

Which component in a circuit breaker detects an short circuit condition and triggers the tripping mechanism?

• Contacts

• Arc extinguisher

• Bimetallic Strip

• Magnetic coil

What is the purpose of an arc extinguisher in a circuit breaker?

• To interrupt the circuit when the current exceeds the rated value

• To extinguish the arc produced during circuit interruption

• To regulate the flow of electricity

• To increase the resistance in the circuit

Which type of circuit breaker is commonly used in high voltage ship power distribution systems due to its ability to quickly interrupt high currents?

• Air circuit breaker (ACB)

• Miniature circuit breaker (MCB)

• Oil circuit breaker (OCB)

• Vacuum circuit breaker (VCB)