Aux 1 Unit 16 Q5

1 / 5

Why is a reverse power relay an important safety device on the main switchboard?

C) To increase the generator's output

A) To control the direction of the ship

D) To measure the fuel consumption

B) To protect the generator from damage by tripping the circuit if it starts to draw power instead of supplying it, which could happen if the generator falls out of sync with the other generators

2 / 5

What is the purpose of an earth fault indicator on the main switchboard?

B) To detect and alert the crew to any unintended connections between the electrical system and the ship's hull or earth, which could indicate a fault or insulation failure

A) To increase the system's voltage

D) To synchronize the generators

C) To reduce the load on the system

3 / 5

What is the primary function of a circuit breaker on a vessel's main switchboard?

B) To automatically disconnect the electrical circuit in the event of an overload or short circuit, preventing damage to equipment and reducing the risk of fire

A) To increase the voltage output of the system

C) To measure the temperature of the electrical components

D) To regulate the frequency of the power supply

4 / 5

What is the function of a voltage regulator in the main switchboard of a vessel?

A) To measure the ship's speed

B) To automatically maintain a stable voltage output from the generator, preventing fluctuations that could damage sensitive electronic equipment or disrupt the electrical supply

C) To monitor the generator's fuel level

D) To reduce the power output

5 / 5

Why is an overload relay fitted to the main switchboard?

B) To detect and respond to excessive current flow that exceeds the rated capacity of the electrical equipment, thereby protecting motors and other devices from damage due to overheating

D) To monitor the voltage levels

A) To automatically shut down the generator

C) To control the speed of the motors

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