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competency Quiz on c10, created by mrk nthny on 06/08/2016.
mrk nthny
Quiz by mrk nthny, updated more than 1 year ago
mrk nthny
Created by mrk nthny over 7 years ago
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Resource summary

Question 1

Question
Reserve buoyancy is __________.
Answer
  • 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

Question 2

Question
A vessel is tender if cargo weight is __________.
Answer
  • 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

Question 3

Question
The purpose of the inclining experiment is to __________.
Answer
  • 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

Question 4

Question
Metacentric height is an indication of a vessel's stability __________.
Answer
  • for small angles of inclination
  • for all angles of inclination
  • for large angles of inclination
  • all of the above

Question 5

Question
Transverse stability calculations require the use of __________.
Answer
  • hydrostatic curves
  • hog or sag calculations or tables
  • general arrangement plans
  • cross-sectional views of the vessel

Question 6

Question
Which statement is true regarding the free surface effect?
Answer
  • 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.

Question 7

Question
Which will be a result of removing on-deck containers?
Answer
  • Metacentric height will increase
  • KG will increase
  • KB will increase
  • Reserve buoyancy will decrease

Question 8

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

Question 9

Question
Which is an indication of reserve buoyancy?
Answer
  • Freeboard
  • Metacentric height
  • Righting moment
  • Rolling period

Question 10

Question
Which action will affect the trim of a vessel?
Answer
  • Moving a weight forward
  • Moving high weights lower
  • Adding weight at the tipping center
  • All of the above

Question 11

Question
If a vessel is sagging, what kind of stress is placed on the sheer strake?
Answer
  • Compression
  • Tension
  • Thrust
  • Racking

Question 12

Question
What will happen when cargo is shifted from the main deck into the lower hold of a vessel?
Answer
  • The GM will increase.
  • The metacenter will move upward
  • The center of buoyancy will move upward
  • All of the above

Question 13

Question
How do you improve a vessel’s stability?
Answer
  • 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

Question 14

Question
With regards to metacentric height, which of the following statement is true?
Answer
  • 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.

Question 15

Question
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_____________.
Answer
  • center of buoyancy
  • keel
  • tipping center
  • amidships section

Question 16

Question
Which of the listed initials is used to represent the indicator of initial stability?
Answer
  • GM
  • KG
  • KM
  • GZ

Question 17

Question
The quality of initial stability is indicated by _______________.
Answer
  • GM
  • KM
  • Deck load
  • Maximum allowed KG

Question 18

Question
A stiff wind has caused a difference to occur between the port and starboard drafts. What do you call this condition?
Answer
  • Heel
  • List
  • Trim
  • Flotation

Question 19

Question
Pitching is angular motion of the vessel about which axis?
Answer
  • Transverse
  • Longitudinal
  • Vertical
  • Centerline

Question 20

Question
Yawing is the angular motion of the vessel about what axis?
Answer
  • Vertical
  • Longitudinal
  • Transverse
  • Centerline

Question 21

Question
Pitching is the rising and falling motion of the bow of a ship oscillating about what axis?
Answer
  • Transverse
  • Longitudinal
  • Vertical
  • Centerline

Question 22

Question
The value of the maximum righting arm is dependent upon the position of the center of buoyancy and the _____________.
Answer
  • vertical location of the center of gravity
  • longitudinal center of gravity
  • transverse center of gravity
  • downflooding angle

Question 23

Question
What is the stability term for the distance between the center of gravity (G) to the Metacenter (M)?
Answer
  • Metacentri height
  • Metacentric radius
  • Height of the metacenter
  • Righting arm

Question 24

Question
What is termed as horizontal fore and aft motion of a vessel while underway?
Answer
  • Surge
  • Pitch
  • Sway
  • Roll

Question 25

Question
What do you call the angular movement of a vessel about a horizontal line drawn from its bow to its stern?
Answer
  • Rolling
  • Pitching
  • Heaving
  • Swaying

Question 26

Question
How can generally improve the vessel’s stability in a hazardous situation?
Answer
  • Ballasting appropriate port or starboard deep tanks
  • Pumping double bottoms to the forepeak
  • transferring ballast athwartships
  • deballasting double bottoms

Question 27

Question
When flooding occurs in a damaged vessel, what happened to the reserve buoyancy?
Answer
  • Decrease
  • Remains the same
  • Increase
  • Shifts to the low side

Question 28

Question
While on a voyage, the vessel's master observed that the vessel touched bottom, what should he immediately do?
Answer
  • File a marine protest and underwater examination
  • Request for drydocking
  • Request for surveyor
  • Request for divers

Question 29

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

Question 30

Question
The construction of vessel made of steel should have a grade in accordance with what guidelines?
Answer
  • Rules of the classification society
  • Rules of the shipyard
  • Shipping law
  • Admiralty law

Question 31

Question
The construction of vessel made of steel should have a grade in accordance with the ____________.
Answer
  • Rules of the classification society
  • Rules of the shipyard
  • Grade steel certificate
  • Rules of S.M.E. Code

Question 32

Question
What is the purpose of swash bulkheads?
Answer
  • 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

Question 33

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

Question 34

Question
What do you call a vessel having a concentration of weight toward the top of the vessel?
Answer
  • Tender
  • Stiff
  • Stiffbuoyant
  • Neutral

Question 35

Question
Angular motion about the vertical axis of a vessel is known as ________.
Answer
  • yaw
  • surge
  • hog
  • roll

Question 36

Question
What effect will transferring fuel oil from #1P double bottom to #3P double bottom have on the trim of a vessel?
Answer
  • The forward draft will decrease.
  • The mean draft will increase.
  • The mean draft will decrease.
  • The after draft will decrease.

Question 37

Question
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?
Answer
  • 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.

Question 38

Question
What is the usual effect of moving weight from low in the vessel to above the main deck?
Answer
  • The stability is decreased.
  • The stability is increased.
  • The draft is increased.
  • The reserve buoyancy is decreased.

Question 39

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

Question 40

Question
The reserve buoyancy of a ship consists of ________________.
Answer
  • 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

Question 41

Question
What do you call a distance between the bottom of the hull and the waterline?
Answer
  • Draft
  • Tonnage
  • Reserve buoyancy
  • Freeboard

Question 42

Question
Rolling is the angular motion of the vessel about what axis?
Answer
  • Longitudinal
  • Transverse
  • Vertical
  • Centerline

Question 43

Question
What is termed as the difference between the initial trim of a vessel and the trim after a change in load has occurred?
Answer
  • Change of trim
  • Trim
  • Final trim
  • Change of draft

Question 44

Question
Reserve buoyancy is the _________________.
Answer
  • 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

Question 45

Question
When is adverse effect due to free surface become apparent?
Answer
  • 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

Question 46

Question
What is the condition of a vessel trimmed down by the bow?
Answer
  • Greater draft forward than aft
  • Zero trim
  • Low mean draft
  • Greater draft aft than forward

Question 47

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

Question 48

Question
The factor contributing to the greatest effect on the ship’s period of roll is the ____________.
Answer
  • vertical weight distribution
  • length of KB
  • virtual rise in the center of gravity
  • moment to trim 1 inch (MT 1)

Question 49

Question
Longitudinal stability indicates the tendency of a ship to resist a ________.
Answer
  • change in trim
  • change in list
  • change in mean draft
  • change in the period of roll

Question 50

Question
The angular movement of a vessel about a horizontal line drawn from its bow to its stern is _______________.
Answer
  • rolling
  • Pitching
  • heaving
  • swaying

Question 51

Question
You may improve a vessel’s stability by _______________.
Answer
  • 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

Question 52

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

Question 53

Question
The reserve buoyancy of a vessel varies directly with changed in the vessel’s_____.
Answer
  • freeboard
  • free surface
  • rolling period
  • none of the above

Question 54

Question
Pitching is angular motion of the vessel about which axis?
Answer
  • Transverse
  • Longitudinal
  • Vertical
  • Centerline

Question 55

Question
Flooding of any compartment in a ship, resulting in a serious loss of reserve buoyancy, will always ________________.
Answer
  • reduce ship stability
  • increase ship stability
  • cause a serious permanent list
  • decrease the heeling moment

Question 56

Question
Angular motion about the vertical axis of a vessel is known as ________.
Answer
  • yaw
  • surge
  • hog
  • roll

Question 57

Question
Yawing is the angular motion of the vessel about what axis?
Answer
  • Vertical
  • Longitudinal
  • Transverse
  • Centerline

Question 58

Question
The reserve buoyancy of a ship consists of ________________.
Answer
  • 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

Question 59

Question
Reserve buoyancy is the _________________.
Answer
  • 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

Question 60

Question
When flooding occurs in a damaged vessel, reserve buoyancy _____________.
Answer
  • decrease
  • remains the same
  • increase
  • shifts to the low side

Question 61

Question
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 ___________________.
Answer
  • center of buoyancy
  • keel
  • tipping center
  • amidships section

Question 62

Question
The center of volume of the immersed portion of the vessel is the _________________.
Answer
  • center of buoyancy
  • center of floatation
  • metacentric height
  • center of gravity

Question 63

Question
Which of the listed initials is used to represent the indicator of initial stability?
Answer
  • GM
  • KG
  • KM
  • GZ

Question 64

Question
The quality of initial stability is indicated by _______________.
Answer
  • GM
  • KM
  • Deck load
  • Maximum allowed KG

Question 65

Question
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 _____________.
Answer
  • metacenter
  • center of gravity
  • center of floatation
  • metacentric height

Question 66

Question
With regards to metacentric height, which of the following statement is true?
Answer
  • 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.

Question 67

Question
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 ________________.
Answer
  • metacentri height
  • metacentric radius
  • height of the metacenter
  • righting arm

Question 68

Question
The value of the maximum righting arm is dependent upon the position of the center of buoyancy and the _____________.
Answer
  • vertical location of the center of gravity
  • longitudinal center of gravity
  • transverse center of gravity
  • downflooding angle

Question 69

Question
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 _______________.
Answer
  • buoyancy
  • effort
  • flotation
  • gravity

Question 70

Question
In the absence of external forces, the center of gravity of a floating vessel is located directly above the _______________.
Answer
  • geometric center of the displaced volume
  • metacenter
  • amidships
  • center of flotation

Question 71

Question
Which abbreviation represents the height of the center of buoyancy?
Answer
  • KB
  • BK
  • CB
  • BM

Question 72

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

Question 73

Question
Stability is determined principally by the relationship of the center of gravity and the __________.
Answer
  • center of buoyancy
  • aft perpendicular
  • keel
  • center of flotation

Question 74

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

Question 75

Question
Any single ship’s compartment sustaining partial flooding with free communication to the sea will _________.
Answer
  • seriously decrease stability
  • increase reserve buoyancy
  • decrease the free surface effect
  • result in the ship’s sinking

Question 76

Question
Horizontal fore and aft motion of a vessel while underway is called ________.
Answer
  • surge
  • pitch
  • sway
  • roll

Question 77

Question
Rolling is the angular motion of the vessel about what axis?
Answer
  • Longitudinal
  • Transverse
  • Vertical
  • Centerline

Question 78

Question
Vessel bilge keels are designed primarily to __________.
Answer
  • 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

Question 79

Question
Pitching is the rising and falling motion of the bow of a ship oscillating about what axis?
Answer
  • Transverse
  • Longitudinal
  • Vertical
  • Centerline

Question 80

Question
A vessel having a concentration of weight toward the top of the vessel is said to be ___________.
Answer
  • tender
  • stiff
  • stiffbuoyant
  • neutral

Question 81

Question
What is the usual effect of moving weight from low in the vessel to above the main deck?
Answer
  • The stability is decreased.
  • The stability is increased.
  • The draft is increased.
  • The reserve buoyancy is decreased.

Question 82

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

Question 83

Question
You can generally improve the vessel’s stability in a hazardous situation by _________.
Answer
  • ballasting appropriate port or starboard deep tanks
  • pumping double bottoms to the forepeak
  • transferring ballast athwartships
  • deballasting double bottoms

Question 84

Question
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?
Answer
  • 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.

Question 85

Question
If fuel oil is burned from only the starboard tanks, the ship will _________.
Answer
  • list to port
  • go down by the head
  • list to starboard
  • trim by the stern

Question 86

Question
A vessel trimmed down by the bow has ______________.
Answer
  • a greater draft forward than aft
  • zero trim
  • a low mean draft
  • a greater draft aft than forward

Question 87

Question
A stiff wind has caused a difference to occur between the port and starboard drafts. This condition is known as _________.
Answer
  • heel
  • list
  • trim
  • flotation

Question 88

Question
What effect will transferring fuel oil from #1P double bottom to #3P double bottom have on the trim of a vessel?
Answer
  • The forward draft will decrease.
  • The mean draft will increase.
  • The mean draft will decrease.
  • The after draft will decrease.

Question 89

Question
The distance between the bottom of the hull and the waterline is called _______.
Answer
  • draft
  • tonnage
  • reserve buoyancy
  • freeboard

Question 90

Question
For an upright vessel, draft is the vertical distance between the keel and the ____________.
Answer
  • waterline
  • freeboard deck
  • Plimsoll mark
  • amidships section

Question 91

Question
You may improve a vessel’s stability by ______________.
Answer
  • 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

Question 92

Question
Reducing the free surface of a liquid within a tank has the effect of lowering the ___________.
Answer
  • virtual height of the center of gravity
  • uncorrected ‘KG’
  • metacenter
  • metacentric height

Question 93

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