Aux 1 Unit 12 Q5

1 / 10

What is the primary purpose of a preferential trip in an electrical system?

B) To selectively disconnect non-essential loads to prevent an overload on the power supply and protect the generator

D) To prevent any circuit from disconnecting

C) To disconnect all circuits simultaneously

A) To increase the power output of the generator

2 / 10

In what scenario would a preferential trip typically be activated?

C) When the system is in standby mode

A) When the system is operating under normal conditions

B) When the electrical load exceeds the generator's capacity, causing an overload condition

D) When the generator is disconnected from the load

3 / 10

During an overload situation, what is the first action taken by the preferential trip mechanism?

D) Shut down the generator

B) Disconnect non-essential loads from the system to reduce the total load on the generator

A) Increase the generator's power output

C) Disconnect all loads from the system

4 / 10

Which type of circuits cannot be connected to a preferential trip?

B) Essential safety and navigational circuits that must remain operational at all times

D) Cabin heating systems

A) Non-essential lighting circuits

C) Entertainment systems

5 / 10

Which of the following is an example of a circuit that should not be connected to a preferential trip?

A) Galley appliances

B) Fire detection and alarm systems

C) Cabin lights

D) Air conditioning units

6 / 10

How does a preferential trip determine which circuits to disconnect during an overload?

D) It disconnects only the circuits that are closest to the generator

A) It randomly disconnects circuits

C) It disconnects the circuits that are drawing the most power

B) It disconnects circuits based on a predefined priority list, starting with the least essential loads

7 / 10

What could happen if the preferential trip mechanism fails to operate during an overload condition?

A) The generator's efficiency will increase

D) The generator will automatically reduce its output

C) All non-essential circuits will remain operational

B) The generator could become overloaded, potentially leading to a complete power loss or damage to the generator

8 / 10

Why is it important that propulsion control circuits are not connected to a preferential trip?

D) They can be easily restarted

A) They are non-essential circuits

B) They are essential for maneuvering the vessel and must remain operational to ensure the vessel can be controlled, especially in emergency situations

C) They consume very little power

9 / 10

Which of the following circuits should be prioritized to remain operational and therefore not be connected to a preferential trip?

A) Refrigeration systems for food storage

B) Emergency lighting and power systems

C) Entertainment systems

D) Water heating systems

10 / 10

Which of the following types of circuits are generally not affected by preferential tripping to ensure continuous operation?

D) Crew entertainment systems

A) Non-essential HVAC systems

C) Galley equipment

B) Navigational equipment such as radar and GPS

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