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CES 6.1

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About this collection

The CES collection contains questions for seafarers' professional knowledge checks. Start with the main question bank, study answers one at a time, or use a random selection to check your knowledge in exam mode.

“CES — CES 6.1” contains 18,151 questions across 1 collection.

Learning

Learning mode has no timer. After answering, you see feedback and the correct options. You can return to a question and repeat a topic.

Exam

A practice exam lasts up to 60 minutes and includes up to 50 questions from the selected collection. Correct answers and results appear after completion.

Sample questions and answers

These examples come from the published collection. Choose Learning to study questions in sequence, or Exam to check your knowledge.

Many modern medium and high speed diesel engines operate at very high power ratings resulting in relatively high bearing loads. In order to accommodate these loads the bearings are required to have a high load carrying capacity. What kind of bearings are normally used for main and bottom end purposes to achieve this?

One correct answer

  • Thin steel shells with a thin white metal lining.
  • Thick white metal types with the white metal cast into the keeps to give extra fatigue strength.
  • Thin steel shells with a copper lead lining and a running in overlay.
  • Thin steel shells lined with aluminium tin alloys.✓ Correct answer
Which wave length applies to a frequency of 150 MHz?

One correct answer

  • 20 cm
  • 1000 cm
  • 50 cm
  • 200 cm✓ Correct answer
Why did they make the ladder ready on the starboard side?

One correct answer

  • Because the pilot told the helmsman to come easy to starboard.
  • Because the crew was already on stand-by fore and aft.
  • Because they expected the harbor pilot to board the ship at 0730.✓ Correct answer
  • Because the wind was strong when the ship was going full ahead.
The display of the DSC-controller on board is showing the following lines: TX call:Selectiveto: 02114200 Category: RoutineUSB:telephony DSC Tx 2189.5 kHz save>send< This DSC-message must be transmitted in the mode:

One correct answer

  • G3E
  • F1B✓ Correct answer
  • J3E
  • H3E
*How long should it take to release at least two thirds of the charge of CO2 that is provided for a ro-ro cargo space protected with a fixed carbon dioxide fire-extinguishing system?

One correct answer

  • Not more than 2 minutes
  • Not more than 10 minutes✓ Correct answer
  • Not more than 35 seconds
  • Not more than 5 minutes

Before you start

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What language are the questions in?

Questions and answer options retain the language of the original bank. You can change the interface language separately.

Can I use my result as an official document?

No. This is independent practice. A result does not replace an examination, certificate or knowledge check by an authorised organisation.