CD0232. High Voltage, Equipment and testing

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CD0232. High Voltage, Equipment and testing
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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 — CD0232. High Voltage, Equipment and testing” contains 41 questions across 1 collection.

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Sample questions and answers

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Which one of the following best describes the action to take if the polarisation index calculated from insulation readings on a piece of high voltage equipment has risen by 35% in 6 months?

One correct answer

The change should be investigated unless maintenance is known to be responsible for the rise✓ Correct answer
Pat yourself on the back for a good job done
Take the readings again, there must be a mistake
Send an e mail to the company telling them the new insulation meter is better than the old one

Which one of the following best describes the process of drawing up and implementing a switching plan when connecting or disconnecting high voltage electrical equipment?

One correct answer

Anyone can draw up the switching plan but the authorised person must approve it✓ Correct answer
The authorised person must draw up the switching plan
The authorised person must draw up the switching plan but the chief engineer must approve the plan
The competent person must approve the switching plan

Which one of the following best describes why someone on a high voltage ship may want to use a ‘multilock’?

One correct answer

Multilocks are used where more than one person wishes to ensure that a circuit breaker cannot be operated without their permission✓ Correct answer
Multilocks are used so all padlocks on circuit breakers can be opened by the same key
Multilocks are used where more than one size of circuit breaker is required to be locked using a standard size lock
Multilocks have long wires so that more than one switch can be locked off with a single lock

If isolation is not thorough, which of the following is the most dangerous stage in making a piece of high voltage electrical equipment safe to work on, according to this module?

One correct answer

Earthing✓ Correct answer
Disconnection
Reconnection
Deading

With regard to the management of high voltage electrical systems, which one of the following best describes the difference between an ‘Authorised Person’ and a ‘Senior Authorised Person’, as stated in this module?

One correct answer

An Authorised Person may have control over certain parts of the network with overall network control being held by a Senior Authorised Person✓ Correct answer
Only a certified Chief Engineer can be a Senior Authorised Person
Senior Authorised Persons need to reach the standards set out in STCW for electrical officers and Authorised Persons can be engineers
An Authorised Person can become a Senior Authorised Person after 18 months sea service

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