OIC-EW MARINA REVIEWER / QUIZ COMPETENCE 6 – PART 4

COMPETENCE 6 – Operate Electrical, Electronic and Control Systems

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QUIZ START

#1. How many possible states does a binary logic circuit have?

Incorrect!

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#2. If the excitation of an alternator operating in parallel is decreased below normal and the other above normal, what will be the result on the alternator with the excitation decreased below normal?

Incorrect!

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#3. If all three ground-detection lamps continue to burn at equal intensity after the test button is depressed and released, which of the listed conditions is indicated?

Incorrect!

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#4. How would you increase the frequency of an operating AC generator?

Incorrect!

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#5. How should the shunt of a DC ammeter be connected?

Incorrect!

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#6. How will a molded-case circuit breaker with a thermal trip unit react immediately after it has tripped, as a result of an overloaded motor circuit?

Incorrect!

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#7. If a short circuit in the armature of a DC motor occurs what would be the result?

Incorrect!

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#8. If the contacts of a motor starter or controller fail to drop out when the ’stop’ button is depressed, what could be the cause?

Incorrect!

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#9. If an electric motor fails to start, what should you check FIRST?

Incorrect!

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#10. How would a DC ammeter designed to directly measure current be connected?

Incorrect!

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#11. If many turns of an alternating current coil for a contactor become short circuited, what will happen to the coil?

Incorrect!

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#12. Humming or buzzing of electric contacts is a symptom of what condition?

Incorrect!

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#13. If a magnetic controller relay fails to drop out when the coil voltage is removed from the relay, what is the probable cause?

Incorrect!

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#14. How will the value of the output frequency change if the load is removed from a turbo generator having a governor speed droop setting of 3%?

Incorrect!

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#15. If field excitation is suddenly lost to an alternator operating in parallel with another alternator, what will happen to the alternator that has experienced a loss of field excitation?

Incorrect!

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#16. If an unloaded DC compound motor’s shunt field were weakened by excessive rheostat resistance or by an open circuit, how would the motor respond?

Incorrect!

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#17. If a magnetic controller contact fails to pick up when the operating coil is energized, what could be one possible cause?

Incorrect!

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#18. Hysteresis is one cause of electrical power loss associated with electricity generation equipment. What phenomenon results in hysteresis?

Incorrect!

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#19. If a DC motor runs faster than designed, with all other conditions being normal, what could be the possible cause?

Incorrect!

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#20. If the centrifugal switch or relay used for cutting out the starting winding of a split-phase induction motor fails to open once the motor is in operation, what will be the result?

Incorrect!

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Finish

There are 20 questions for the actual examination for Competence 6 for OIC-EW with a passing rate of 70%. This means that you are only allowed to make 6 mistakes.

DISCLAIMER

The questionnaires contained in this “reviewer” are extracted from the post released by MARINA on their official website and other review materials. Please note that Seaman Kowts is not affiliated with, endorsed by, or connected to the official website of MARINA. The information provided on this website is for general informational and educational purposes only and should not be relied upon as official or authoritative. If you require official information or services, please visit the official website or any relevant review center. We do not assume any responsibility or liability for any consequences resulting from the use of information or services provided on this website.

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