Aux 1 Unit 14 Q5

1 / 10

What impact might running a 60Hz vessel on a 50Hz supply have on the vessel’s lighting system?

A) The lights will be brighter.

D) The lights will shut off completely.

C) The lights will operate normally without any issues.

B) The lights may flicker or operate at reduced brightness due to the lower frequency, leading to potential stress on the lighting components.

2 / 10

What could happen to transformers on the vessel if they are operated on a 50Hz supply instead of the intended 60Hz supply?

C) The transformers will not be affected at all.

B) The transformers may overheat due to higher current draw and increased core losses, leading to potential damage.

D) The transformers will shut down automatically.

A) The transformers will operate more efficiently.

3 / 10

Which of the following is a critical item to check before connecting a shore power supply to a vessel?

B) The voltage compatibility between the shore supply and the vessel’s electrical system

C) The color of the shore power plug

D) The size of the vessel’s anchor

A) The length of the shore power cable

4 / 10

Why is it important to check the grounding (earth) connection before connecting to shore power?

C) To verify the cable’s color coding

D) To ensure the power is delivered at the correct time

A) To ensure the shore power cable is long enough

B) To confirm the system is safely grounded, preventing potential electric shocks or equipment damage

5 / 10

What should be verified about the shore supply capacity before connecting to the vessel?

C) The capacity is not important

A) The supply capacity is equal to the vessel's maximum demand to avoid overloading the shore supply

D) The capacity is twice the vessel's requirement

B) The capacity is lower than the vessel's requirement

6 / 10

Before connecting the shore power, what should be verified about the frequency of the shore supply?

C) It is lower than the vessel’s frequency

B) It is higher than the vessel’s frequency

D) It is not important as long as the voltage is correct

A) It matches the vessel’s required frequency (e.g., 50Hz or 60Hz)

7 / 10

Before connecting to shore power, what final check should be made?

D) Verify the weight of the shore power plug

A) Ensure the vessel's engines are running

B) Verify that all onboard systems are ready to accept shore power, and any non-essential loads are turned off during the connection process to avoid a power surge

C) Ensure the shore power cable is disconnected

8 / 10

What is a likely effect on motor-driven equipment if a 60Hz vessel is connected to a 50Hz shore power supply?

C) The motors will operate normally without any issues.

A) The motors will run faster.

D) The motors will stop working altogether.

B) The motors will run slower, potentially causing overheating and reduced efficiency.

9 / 10

Which safety device must be operational and checked before connecting to shore power?

B) The shore power circuit breaker and fuses

D) The anchor windlass

C) The vessel’s navigation lights

A) The vessel's radio system

10 / 10

What should be checked regarding the shore power cable before connecting it to the vessel?

A) The color of the cable

C) The length of the cable

B) The insulation condition of the cable, ensuring there are no signs of wear, damage, or exposure

D) The weight of the cable

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