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competency Quiz on c10, created by mrk nthny on 06/08/2016.

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Question 1 of 93

1

Reserve buoyancy is __________.

Select one of the following:

  • the watertight portion of a vessel above the waterline

  • also called GM

  • the void portion of the ship below the waterline which is enclosed and watertight

  • affected by the number of transverse watertight bulkheads

Explanation

Question 2 of 93

1

A vessel is tender if cargo weight is __________.

Select one of the following:

  • concentrated high and the double bottoms empty

  • concentrated low and the double bottoms empty

  • evenly distributed vertically with the double bottoms full

  • concentrated and with the double bottoms full

Explanation

Question 3 of 93

1

The purpose of the inclining experiment is to __________.

Select one of the following:

  • determine the lightweight center of gravity location

  • determine the location of the metacenter

  • verify the hydrostatic data

  • verify data in the vessel's operating manual

Explanation

Question 4 of 93

1

Metacentric height is an indication of a vessel's stability __________.

Select one of the following:

  • for small angles of inclination

  • for all angles of inclination

  • for large angles of inclination

  • all of the above

Explanation

Question 5 of 93

1

Transverse stability calculations require the use of __________.

Select one of the following:

  • hydrostatic curves

  • hog or sag calculations or tables

  • general arrangement plans

  • cross-sectional views of the vessel

Explanation

Question 6 of 93

1

Which statement is true regarding the free surface effect?

Select one of the following:

  • It decreases at increased angles of heel due to pocketing when a tank is 90% full.

  • It increases in direct proportion to the length of the tank times the breadth squared.

  • It decreases in direct proportion to increasing specific gravity of the liquid in the tank.

  • In practice, the correction is considered to be a virtual reduction of KG.

Explanation

Question 7 of 93

1

Which will be a result of removing on-deck containers?

Select one of the following:

  • Metacentric height will increase

  • KG will increase

  • KB will increase

  • Reserve buoyancy will decrease

Explanation

Question 8 of 93

1

In order to minimize the effects of a tender vessel, when carrying a cargo of lumber, you should __________.

Select one of the following:

  • place the heaviest woods in the lower holds

  • maximize your deck load

  • distribute lumber so that those stowing most compactly per unit of weight are in the upper holds

  • keep the vessel's frame spaces free from lumber

Explanation

Question 9 of 93

1

Which is an indication of reserve buoyancy?

Select one of the following:

  • Freeboard

  • Metacentric height

  • Righting moment

  • Rolling period

Explanation

Question 10 of 93

1

Which action will affect the trim of a vessel?

Select one of the following:

  • Moving a weight forward

  • Moving high weights lower

  • Adding weight at the tipping center

  • All of the above

Explanation

Question 11 of 93

1

If a vessel is sagging, what kind of stress is placed on the sheer strake?

Select one of the following:

  • Compression

  • Tension

  • Thrust

  • Racking

Explanation

Question 12 of 93

1

What will happen when cargo is shifted from the main deck into the lower hold of a vessel?

Select one of the following:

  • The GM will increase.

  • The metacenter will move upward

  • The center of buoyancy will move upward

  • All of the above

Explanation

Question 13 of 93

1

How do you improve a vessel’s stability?

Select one of the following:

  • Keep ballast water tank fulll

  • Increase the free surface effect of liquid storage tanks

  • Keep fuel tanks at least half full

  • Keep at least one fuel tank empty for slops

Explanation

Question 14 of 93

1

With regards to metacentric height, which of the following statement is true?

Select one of the following:

  • It is used to indicate the quality of initial stability.

  • It is located below the center of buoyancy.

  • It is measured vertically above the center of buoyancy.

  • Its determination is the objective of the inclining experiment.

Explanation

Question 15 of 93

1

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

Select one of the following:

  • center of buoyancy

  • keel

  • tipping center

  • amidships section

Explanation

Question 16 of 93

1

Which of the listed initials is used to represent the indicator of initial stability?

Select one of the following:

  • GM

  • KG

  • KM

  • GZ

Explanation

Question 17 of 93

1

The quality of initial stability is indicated by _______________.

Select one of the following:

  • GM

  • KM

  • Deck load

  • Maximum allowed KG

Explanation

Question 18 of 93

1

A stiff wind has caused a difference to occur between the port and starboard drafts. What do you call this condition?

Select one of the following:

  • Heel

  • List

  • Trim

  • Flotation

Explanation

Question 19 of 93

1

Pitching is angular motion of the vessel about which axis?

Select one of the following:

  • Transverse

  • Longitudinal

  • Vertical

  • Centerline

Explanation

Question 20 of 93

1

Yawing is the angular motion of the vessel about what axis?

Select one of the following:

  • Vertical

  • Longitudinal

  • Transverse

  • Centerline

Explanation

Question 21 of 93

1

Pitching is the rising and falling motion of the bow of a ship oscillating about what axis?

Select one of the following:

  • Transverse

  • Longitudinal

  • Vertical

  • Centerline

Explanation

Question 22 of 93

1

The value of the maximum righting arm is dependent upon the position of the center of buoyancy and the _____________.

Select one of the following:

  • vertical location of the center of gravity

  • longitudinal center of gravity

  • transverse center of gravity

  • downflooding angle

Explanation

Question 23 of 93

1

What is the stability term for the distance between the center of gravity (G) to the Metacenter (M)?

Select one of the following:

  • Metacentri height

  • Metacentric radius

  • Height of the metacenter

  • Righting arm

Explanation

Question 24 of 93

1

What is termed as horizontal fore and aft motion of a vessel while underway?

Select one of the following:

  • Surge

  • Pitch

  • Sway

  • Roll

Explanation

Question 25 of 93

1

What do you call the angular movement of a vessel about a horizontal line drawn from its bow to its stern?

Select one of the following:

  • Rolling

  • Pitching

  • Heaving

  • Swaying

Explanation

Question 26 of 93

1

How can generally improve the vessel’s stability in a hazardous situation?

Select one of the following:

  • Ballasting appropriate port or starboard deep tanks

  • Pumping double bottoms to the forepeak

  • transferring ballast athwartships

  • deballasting double bottoms

Explanation

Question 27 of 93

1

When flooding occurs in a damaged vessel, what happened to the reserve buoyancy?

Select one of the following:

  • Decrease

  • Remains the same

  • Increase

  • Shifts to the low side

Explanation

Question 28 of 93

1

While on a voyage, the vessel's master observed that the vessel touched bottom, what should he immediately do?

Select one of the following:

  • File a marine protest and underwater examination

  • Request for drydocking

  • Request for surveyor

  • Request for divers

Explanation

Question 29 of 93

1

Many uninspected vessels require load lines to indicate the maximum ___________.

Select one of the following:

  • amidship's draft to which a vessel can be lawfully submerged

  • reserve buoyancy under any condition

  • angle of reduced freeboard for subdivision calculations

  • freeboard for the light ship displacement

Explanation

Question 30 of 93

1

The construction of vessel made of steel should have a grade in accordance with what guidelines?

Select one of the following:

  • Rules of the classification society

  • Rules of the shipyard

  • Shipping law

  • Admiralty law

Explanation

Question 31 of 93

1

The construction of vessel made of steel should have a grade in accordance with the ____________.

Select one of the following:

  • Rules of the classification society

  • Rules of the shipyard

  • Grade steel certificate

  • Rules of S.M.E. Code

Explanation

Question 32 of 93

1

What is the purpose of swash bulkheads?

Select one of the following:

  • Reduce liquid movement and surging within a tank

  • Separate cargoes in a common tank

  • Used whenever the 'gray' water drain system connection is located in a bulkhead

  • Restrict flooding within a tank

Explanation

Question 33 of 93

1

The inclining experiment conducted on a merchant ship is the method for determining the exact location of the ______________.

Select one of the following:

  • position of the ship’s center of gravity

  • ship’s displacement in seawater

  • position of the ship’s center of buoyancy

  • position of the ship’smetacenter

Explanation

Question 34 of 93

1

What do you call a vessel having a concentration of weight toward the top of the vessel?

Select one of the following:

  • Tender

  • Stiff

  • Stiffbuoyant

  • Neutral

Explanation

Question 35 of 93

1

Angular motion about the vertical axis of a vessel is known as ________.

Select one of the following:

  • yaw

  • surge

  • hog

  • roll

Explanation

Question 36 of 93

1

What effect will transferring fuel oil from #1P double bottom to #3P double bottom have on the trim of a vessel?

Select one of the following:

  • The forward draft will decrease.

  • The mean draft will increase.

  • The mean draft will decrease.

  • The after draft will decrease.

Explanation

Question 37 of 93

1

Which of the listed conditions will occur to the ship’s center of gravity if 200 tons of steel is transferred to the ship’s cargo from shore side?

Select one of the following:

  • The center of gravity will be lowered.

  • The reserve buoyancy will rise.

  • The center of gravity will remain in the same position.

  • The reserve buoyancy will remain the same.

Explanation

Question 38 of 93

1

What is the usual effect of moving weight from low in the vessel to above the main deck?

Select one of the following:

  • The stability is decreased.

  • The stability is increased.

  • The draft is increased.

  • The reserve buoyancy is decreased.

Explanation

Question 39 of 93

1

What is the usual effect of moving weight from the main deck to a position lower in the vessel?

Select one of the following:

  • The stability of the vessel is increased.

  • The trim of the vessel is increase.

  • The stability of the vessel is significantly decreased.

  • The vessel will list in proportion to the volume of the cargo shifted.

Explanation

Question 40 of 93

1

The reserve buoyancy of a ship consists of ________________.

Select one of the following:

  • the part of the enclosed and watertight portion of a vessel above the waterline

  • the void portion of the ship below the waterline which is enclosed and watertight

  • all cofferdams, double bottoms, and wing tanks that are slack

  • the percentage of the volume of a compartment which can be occupied by water if flooded

Explanation

Question 41 of 93

1

What do you call a distance between the bottom of the hull and the waterline?

Select one of the following:

  • Draft

  • Tonnage

  • Reserve buoyancy

  • Freeboard

Explanation

Question 42 of 93

1

Rolling is the angular motion of the vessel about what axis?

Select one of the following:

  • Longitudinal

  • Transverse

  • Vertical

  • Centerline

Explanation

Question 43 of 93

1

What is termed as the difference between the initial trim of a vessel and the trim after a change in load has occurred?

Select one of the following:

  • Change of trim

  • Trim

  • Final trim

  • Change of draft

Explanation

Question 44 of 93

1

Reserve buoyancy is the _________________.

Select one of the following:

  • volume of intact space above the waterline

  • unoccupied space below the waterline

  • excess of the buoyant force over gravitational force

  • difference between buoyancy in salt and fresh waters

Explanation

Question 45 of 93

1

When is adverse effect due to free surface become apparent?

Select one of the following:

  • When a portion of liquid is removed from a full tank

  • When the vessel is trimmed by the stern

  • When the vessel’s draft is decreased exposing more surface area to the wind and current

  • When the vessel’s draft is increased, thus increasing the vessel’s wetted surface area

Explanation

Question 46 of 93

1

What is the condition of a vessel trimmed down by the bow?

Select one of the following:

  • Greater draft forward than aft

  • Zero trim

  • Low mean draft

  • Greater draft aft than forward

Explanation

Question 47 of 93

1

The difference between the initial trim of a vessel and the trim after a change in load has occurred is known as _____________.

Select one of the following:

  • change of trim

  • trim

  • final trim

  • change of draft

Explanation

Question 48 of 93

1

The factor contributing to the greatest effect on the ship’s period of roll is the ____________.

Select one of the following:

  • vertical weight distribution

  • length of KB

  • virtual rise in the center of gravity

  • moment to trim 1 inch (MT 1)

Explanation

Question 49 of 93

1

Longitudinal stability indicates the tendency of a ship to resist a ________.

Select one of the following:

  • change in trim

  • change in list

  • change in mean draft

  • change in the period of roll

Explanation

Question 50 of 93

1

The angular movement of a vessel about a horizontal line drawn from its bow to its stern is _______________.

Select one of the following:

  • rolling

  • Pitching

  • heaving

  • swaying

Explanation

Question 51 of 93

1

You may improve a vessel’s stability by _______________.

Select one of the following:

  • keeping double-bottom fuel tanks topped off

  • increasing the free surface effect of liquid storage tanks

  • keeping fuel tanks at least half full

  • keeping at least one fuel tank empty for slops

Explanation

Question 52 of 93

1

Adverse effect due to free surface will become apparent when _____________.

Select one of the following:

  • a portion of liquid is removed from a full tank

  • the vessel is trimmed by the stern

  • the vessel’s draft is decreased exposing more surface area to the wind and current

  • the vessel’s draft is increased, thus increasing the vessel’s wetted surface area

Explanation

Question 53 of 93

1

The reserve buoyancy of a vessel varies directly with changed in the vessel’s_____.

Select one of the following:

  • freeboard

  • free surface

  • rolling period

  • none of the above

Explanation

Question 54 of 93

1

Pitching is angular motion of the vessel about which axis?

Select one of the following:

  • Transverse

  • Longitudinal

  • Vertical

  • Centerline

Explanation

Question 55 of 93

1

Flooding of any compartment in a ship, resulting in a serious loss of reserve buoyancy, will always ________________.

Select one of the following:

  • reduce ship stability

  • increase ship stability

  • cause a serious permanent list

  • decrease the heeling moment

Explanation

Question 56 of 93

1

Angular motion about the vertical axis of a vessel is known as ________.

Select one of the following:

  • yaw

  • surge

  • hog

  • roll

Explanation

Question 57 of 93

1

Yawing is the angular motion of the vessel about what axis?

Select one of the following:

  • Vertical

  • Longitudinal

  • Transverse

  • Centerline

Explanation

Question 58 of 93

1

The reserve buoyancy of a ship consists of ________________.

Select one of the following:

  • the part of the enclosed and watertight portion of a vessel above the waterline

  • the void portion of the ship below the waterline which is enclosed and watertight

  • all cofferdams, double bottoms, and wing tanks that are slack

  • the percentage of the volume of a compartment which can be occupied by water if flooded

Explanation

Question 59 of 93

1

Reserve buoyancy is the _________________.

Select one of the following:

  • volume of intact space above the waterline

  • unoccupied space below the waterline

  • excess of the buoyant force over gravitational force

  • difference between buoyancy in salt and fresh waters

Explanation

Question 60 of 93

1

When flooding occurs in a damaged vessel, reserve buoyancy _____________.

Select one of the following:

  • decrease

  • remains the same

  • increase

  • shifts to the low side

Explanation

Question 61 of 93

1

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

Select one of the following:

  • center of buoyancy

  • keel

  • tipping center

  • amidships section

Explanation

Question 62 of 93

1

The center of volume of the immersed portion of the vessel is the _________________.

Select one of the following:

  • center of buoyancy

  • center of floatation

  • metacentric height

  • center of gravity

Explanation

Question 63 of 93

1

Which of the listed initials is used to represent the indicator of initial stability?

Select one of the following:

  • GM

  • KG

  • KM

  • GZ

Explanation

Question 64 of 93

1

The quality of initial stability is indicated by _______________.

Select one of the following:

  • GM

  • KM

  • Deck load

  • Maximum allowed KG

Explanation

Question 65 of 93

1

In small angle stability, when external forces exist, the buoyant force is assumed to act vertically upwards through the center of buoyancy and though the _____________.

Select one of the following:

  • metacenter

  • center of gravity

  • center of floatation

  • metacentric height

Explanation

Question 66 of 93

1

With regards to metacentric height, which of the following statement is true?

Select one of the following:

  • It is used to indicate the quality of initial stability.

  • It is located below the center of buoyancy.

  • It is measured vertically above the center of buoyancy.

  • Its determination is the objective of the inclining experiment.

Explanation

Question 67 of 93

1

The stability term for the distance between the center of gravity (G) to the Metacenter (M), when small angle stability applies is known as the ________________.

Select one of the following:

  • metacentri height

  • metacentric radius

  • height of the metacenter

  • righting arm

Explanation

Question 68 of 93

1

The value of the maximum righting arm is dependent upon the position of the center of buoyancy and the _____________.

Select one of the following:

  • vertical location of the center of gravity

  • longitudinal center of gravity

  • transverse center of gravity

  • downflooding angle

Explanation

Question 69 of 93

1

The water in which a vessel floats provides vertical upward support. The point through which this support is assumed to act is known as the center of _______________.

Select one of the following:

  • buoyancy

  • effort

  • flotation

  • gravity

Explanation

Question 70 of 93

1

In the absence of external forces, the center of gravity of a floating vessel is located directly above the _______________.

Select one of the following:

  • geometric center of the displaced volume

  • metacenter

  • amidships

  • center of flotation

Explanation

Question 71 of 93

1

Which abbreviation represents the height of the center of buoyancy?

Select one of the following:

  • KB

  • BK

  • CB

  • BM

Explanation

Question 72 of 93

1

The purpose of the vessels “inclining experiment” is to _____________.

Select one of the following:

  • determine the position of the lightship center of gravity

  • determine the location of the metacenter

  • verify the hydrostatic data

  • verify data in the vessel’s operating manual

Explanation

Question 73 of 93

1

Stability is determined principally by the relationship of the center of gravity and the __________.

Select one of the following:

  • center of buoyancy

  • aft perpendicular

  • keel

  • center of flotation

Explanation

Question 74 of 93

1

The inclining experiment conducted on a merchant ship is the method for determining the exact location of the ______________.

Select one of the following:

  • position of the ship’s center of gravity

  • ship’s displacement in seawater

  • position of the ship’s center of buoyancy

  • position of the ship’smetacenter

Explanation

Question 75 of 93

1

Any single ship’s compartment sustaining partial flooding with free communication to the sea will _________.

Select one of the following:

  • seriously decrease stability

  • increase reserve buoyancy

  • decrease the free surface effect

  • result in the ship’s sinking

Explanation

Question 76 of 93

1

Horizontal fore and aft motion of a vessel while underway is called ________.

Select one of the following:

  • surge

  • pitch

  • sway

  • roll

Explanation

Question 77 of 93

1

Rolling is the angular motion of the vessel about what axis?

Select one of the following:

  • Longitudinal

  • Transverse

  • Vertical

  • Centerline

Explanation

Question 78 of 93

1

Vessel bilge keels are designed primarily to __________.

Select one of the following:

  • assist in reducing rolling

  • improve vessel steering response

  • reinforce the bilge knuckle in way of double bottom tanks

  • provide strengthening of the bilge plating through the mid-body

Explanation

Question 79 of 93

1

Pitching is the rising and falling motion of the bow of a ship oscillating about what axis?

Select one of the following:

  • Transverse

  • Longitudinal

  • Vertical

  • Centerline

Explanation

Question 80 of 93

1

A vessel having a concentration of weight toward the top of the vessel is said to be ___________.

Select one of the following:

  • tender

  • stiff

  • stiffbuoyant

  • neutral

Explanation

Question 81 of 93

1

What is the usual effect of moving weight from low in the vessel to above the main deck?

Select one of the following:

  • The stability is decreased.

  • The stability is increased.

  • The draft is increased.

  • The reserve buoyancy is decreased.

Explanation

Question 82 of 93

1

What is the usual effect of moving weight from the main deck to a position lower in the vessel?

Select one of the following:

  • The stability of the vessel is increased.

  • The trim of the vessel is increase.

  • The stability of the vessel is significantly decreased.

  • The vessel will list in proportion to the volume of the cargo shifted.

Explanation

Question 83 of 93

1

You can generally improve the vessel’s stability in a hazardous situation by _________.

Select one of the following:

  • ballasting appropriate port or starboard deep tanks

  • pumping double bottoms to the forepeak

  • transferring ballast athwartships

  • deballasting double bottoms

Explanation

Question 84 of 93

1

Which of the listed conditions will occur to the ship’s center of gravity if 200 tons of steel is transferred to the ship’s cargo from shore side?

Select one of the following:

  • The center of gravity will be lowered.

  • The reserve buoyancy will rise.

  • The center of gravity will remain in the same position.

  • The reserve buoyancy will remain the same.

Explanation

Question 85 of 93

1

If fuel oil is burned from only the starboard tanks, the ship will _________.

Select one of the following:

  • list to port

  • go down by the head

  • list to starboard

  • trim by the stern

Explanation

Question 86 of 93

1

A vessel trimmed down by the bow has ______________.

Select one of the following:

  • a greater draft forward than aft

  • zero trim

  • a low mean draft

  • a greater draft aft than forward

Explanation

Question 87 of 93

1

A stiff wind has caused a difference to occur between the port and starboard drafts. This condition is known as _________.

Select one of the following:

  • heel

  • list

  • trim

  • flotation

Explanation

Question 88 of 93

1

What effect will transferring fuel oil from #1P double bottom to #3P double bottom have on the trim of a vessel?

Select one of the following:

  • The forward draft will decrease.

  • The mean draft will increase.

  • The mean draft will decrease.

  • The after draft will decrease.

Explanation

Question 89 of 93

1

The distance between the bottom of the hull and the waterline is called _______.

Select one of the following:

  • draft

  • tonnage

  • reserve buoyancy

  • freeboard

Explanation

Question 90 of 93

1

For an upright vessel, draft is the vertical distance between the keel and the ____________.

Select one of the following:

  • waterline

  • freeboard deck

  • Plimsoll mark

  • amidships section

Explanation

Question 91 of 93

1

You may improve a vessel’s stability by ______________.

Select one of the following:

  • keeping the fuel tanks topped off

  • increasing the free surface effect

  • keeping the fuel tanks at least half full

  • keeping at least one fuel tank empty for slops

Explanation

Question 92 of 93

1

Reducing the free surface of a liquid within a tank has the effect of lowering the ___________.

Select one of the following:

  • virtual height of the center of gravity

  • uncorrected ‘KG’

  • metacenter

  • metacentric height

Explanation

Question 93 of 93

1

Many uninspected vessels require load lines to indicate the maximum ___________.

Select one of the following:

  • amidship's draft to which a vessel can be lawfully submerged

  • reserve buoyancy under any condition

  • angle of reduced freeboard for subdivision calculations

  • freeboard for the light ship displacement

Explanation

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