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OIC-NW MARINA REVIEWER / QUIZ COMPETENCE 13 – PART 3

22 March, 2023
REVIEWER

COMPETENCE 13 – Maintain seaworthiness of the ship

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QUIZ START

#1. A vessel list and trims from its:

Center of floatation

Center of gravity

Center of buoyancy

Center of underwater volume

Incorrect!

#2. A vessel with a large GM will:

have a small amplitude of roll in heavy weather

tend to ship water on deck in heavy weather

be subject to severe racking stresses

be less likely to have cargo shift

Incorrect!

#3. A vessel trimmed down by the bow has:

zero trim

a greater draft forward than aft

a low mean draft

a greater draft aft than forward

Incorrect!

#4. A virtual rise in the center of gravity of a vessel may be caused by:

using an on board crane to lift a freely swinging heavy object

filling a partially filled tank

emptying a partially filled tank

transferring pipe from the setback area to

Incorrect!

#5. A vessel is inclined at an angle of loll. In the absence of external forces, the righting arm (GZ) is:

positive

negative

zero

vertical

Incorrect!

#6. A vessel is subjected to ‘hogging’ when it:

has its main deck under compressive stress

has its bottom plating under tensile stress

is supported on a wave whose crests are at the bow and stern

is supported on a wave whose crest is amidships

Incorrect!

#7. A vessel is “listed” due to the following conditions?

inclined due to an off- center weight

have negative GM

trimmed by the head

inclined due to effect of the wind

Incorrect!

#8. A vessel’s KG is determined by:

dividing the total vertical moment summation by displacement

dividing the total longitudinal moment summation by displacement

multiplying the MT1 by the longitudinal moments

subtracting LCF from LCB

Incorrect!

#9. A vessel which is subjected to “hogging”:

has its main deck under compressive stress

has its main deck plating under tensile stress

has its bottom plate under tensile stress

has its bottom plating under ductile stress

Incorrect!

#10. A vessel with large metacentric height will:

be less likely to have cargo shift

tend to shift water on deck in heavy weather

be subject to severe racking stress

have small amplitude of roll in heavy weather

Incorrect!

#11. A vessel with a small GM will:

be more subject to synchronous rolling

have a short rolling period

provide an uncomfortable ride for personnel

have a smaller amplitude of roll in heavy weather

Incorrect!

#12. A vessel which is subjected to “sagging”:

is supported on a wave whose crest is amidship

has its main deck in tensile stress

has its bottom plating under tensile stress

is said to be under a form of transverse bending

Incorrect!

#13. A vessel subject to sagging has what condition?

Bottom plating under tensile stress

Main deck under tensile stress

Transverse bending

Superstructure under tensile stress

Incorrect!

#14. A virtual rise in the center of gravity of a vessel may be caused by:

filling a partially filled tank

transferring pipe from the setback area to the pipe rack

using fuel from a pressed fuel tank

emptying a partially filled tank

Incorrect!

#15. A vessel should normally behave as if all of its weight is acting downward through the center of gravity and all of its support is acting upward through the:

keel

center of buoyancy

tipping center

amidships section

Incorrect!

There are 15 questions for the actual examination for Competence 13 for OIC-NW with a passing rate of 70%. This means that you are only allowed to make 4 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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Results

#1. A vessel list and trims from its:

#2. A vessel with a large GM will:

#3. A vessel trimmed down by the bow has:

#4. A virtual rise in the center of gravity of a vessel may be caused by:

#5. A vessel is inclined at an angle of loll. In the absence of external forces, the righting arm (GZ) is:

#6. A vessel is subjected to ‘hogging’ when it:

#7. A vessel is “listed” due to the following conditions?

#8. A vessel’s KG is determined by:

#9. A vessel which is subjected to “hogging”:

#10. A vessel with large metacentric height will:

#11. A vessel with a small GM will:

#12. A vessel which is subjected to “sagging”:

#13. A vessel subject to sagging has what condition?

#14. A virtual rise in the center of gravity of a vessel may be caused by:

#15. A vessel should normally behave as if all of its weight is acting downward through the center of gravity and all of its support is acting upward through the:

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OIC-NW MARINA REVIEWER / QUIZ COMPETENCE 1 – PART 1

OIC-EW MARINA REVIEWER / QUIZ COMPETENCE 11 – PART 9

OIC-EW MARINA REVIEWER / QUIZ COMPETENCE 3 – PART 5