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CD0233. High Voltage, Management on Ships

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About this collection

The Seagull CBT bank is organised into modules covering safety, shipboard operations, maintenance and other topics. Original module names and codes are retained to help you find the topic you need.

“Seagull CBT — CD0233. High Voltage, Management on Ships” contains 40 questions across 1 collection.

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Sample questions and answers

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In relation to high voltage electrical equipment, which one of the following best describes the meaning of ‘dead’?

One correct answer

  • At or about zero voltage and disconnected from all sources of electrical energy✓ Correct answer
  • Disconnected from all power supplies
  • Isolated from its power supply
  • Not capable of movement
Which one of the following best describes who should hold the keys for the circuit breaker locks while maintenance is carried out on high voltage equipment if 4 people are to carry out the work?

One correct answer

  • The person given overall responsibility for carrying out the work should keep all the keys✓ Correct answer
  • Whoever locks the breaker should keep the key for it
  • The Authorised Person should keep all the keys
  • The engine room watchkeeper should keep all the keys
In relation to high voltage electrical networks, which one of the following best describes the most likely place to find a circuit main earth?

One correct answer

  • At a high voltage circuit breaker or isolator✓ Correct answer
  • Where the switchboard is bolted down
  • At intervals of no more than 40m throughout the network
  • At every large motor
Which one of the following best describes what is defined as ‘High Voltage’ with reference to ships’ electrical systems?

One correct answer

  • AC electricity above 1000 Volts✓ Correct answer
  • AC electricity above 3 kiloVolts
  • DC electricity above 1000 Volts
  • AC electricity above 3000 Volts
In relation to electrical equipment, which one of the following best describes the relationship between current levels and overheating in a conductor?

One correct answer

  • Current causes a heating effect of I²R Watts✓ Correct answer
  • Current causes a heating effect of VI Watts
  • High currents can cause high magnetic fields and hysteresis heating
  • Current levels do not affect heating

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