# function II v.10

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1. When the height of the metacenter has the same value as the height of the center of gravity, the metacentric height is equal to?
zero
2. The instrument that measures the density of any liquid is called a_______?
hydrometer
3. the center of buoyancy is the center of _____ of the underwater volume
gravity
4. when the center of gravity is above the metacentric height, a vessel is said
unstable equilibrium
5. to correct a vessel with unstable equilibrium, any of the following actions may be taken EXCEPT
pump out a double bottom tank
6. for a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force ______
at all times
7. when a wind force causes a vessel to heel to a static angle, the ______.
righting moment equals the wind-heeling moment
8. a quick and rapid motion of a vessel in a seaway is an indication of an ?
large GM
9. a slow and easy motion of a vessel in a seaway is an indication of a _______?
small GM
10. The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the ______?
11. the height of metacenter above the keel will vary depending on the
draft and beam
12. if the result of loading a vessel is an increase in the height of the center of gravity, there will always be an increase in the
vertical moment
13. the natural rolling period of a vessel increases when
ice accumulates above deck
14. the effects of free surface on initial stability depend upon the dimensions of the surface of the free liquids and the ?
volume of displacement of the vessel
15. the free surface effects of a partially fulled tank in a vessel increase with the
surface area of the fluid in the tank
16. although KG for some vessels in light weight condition is relatively high, the vessel is stiff because
KM is high
17. The vertical distance between G and M is used as a measure of ?
initial stability
18. Adding the transverse free surface correction to the uncorrected height of the center of gravity of a vessel yields
KGT
19. adding the longitudinal free surface correction to the uncorrected height of the center of gravity of a vessel yields?
KGL
20. subtracting the height of the center of gravity for transverse free surface effects from the height of the transverse metacenter yields?
GML
21. For a vessel with list, an increase in GMTransverse will cause the inclination to
decrease
22. for a vessel with trim, an increase with GMTransverse will cause the inclination to
decrease
23. for a vessel with transverse inclination, an increase in GMTransverse causes
list to decrease
24. for a vessel with longitudinal inclination, an increase in GMLongitudinal causes
trim to decrease
25. a cargo information does not contain _______.
duties of the person in charge during the transfer of cargo
26. The stability which exists after the unintentional flooding of a compartment on a vessel is called
damage stability
27. damage stability of a vessel is the stability ______.
after flooding
28. Topside icing that blocks freeing ports and scuppers _____.
may decrease stability by increasing free surface effect due to water on deck
29. the jettisoning of topside weight from a vessel serves what purpose?
it lowers the center of gravity
30. Repairing damage to the hull of vessel at or above the waterline reduces the threat of ?
continued progressive flooding
31. the center of buoyancy and the metacenter are in the line of action of the buoyant force
at all times
32. To asses the potential for progressive flooding aboard a damaged vessel, you must know the?
integrity of the watertight boundaries
33. progressive flooding on a vessel may be indicated by?
a continual worsening of the trim
34. displacement refers to the?
number of tons of water displaced by a vessel afloat
35. a vessel list and trims from its
center of floatation
36. A vessel is in a "listed" condition when it is _____?
inclined due to an off-center weight
37. when forces within a vessel cause a difference between the starboard and port drafts, the difference is called?
list
38. in the absence of external forces, the center of buoyancy of an inclined vessel is vertically aligned directly below the
center of gravity
39. The difference between the starboard and port drafts caused by shifting a weight transversely?
list
40. with no environmental forces acting on the vessel, the center of gravity of an inclined vessel is vertically aligned with the
metacenter
41. with no environmental forces acting on the vessel, the center of gravity of an inclined vessel is vertically aligned directly above the
center of buoyancy
42. A vessel continually list to one side and has a normal rolling period, which of the following statements is true?
the vessel has asymmetrical weight distribution
43. Before counter-flooding a vessel to correct a list, the ships officer must be sure that the list is due to ______.
off-center weight
44. if the cause of listing or trim is off-center ballast, counter flooding into empty tanks will?
decrease list or trim
list should be easily removed
46. In the absence of external forces, adding weight on one side of a floating vessel causes the vessel to?
list until the center of buoyancy is aligned vertically with the center of gravity
47. topside icing decreases vessel stability because it reduces initial stability and
is usually off-center
48. consider a vessel with an even transverse distribution of weight, which condition would cause a list?
empty double bottoms, heavy deck cargo
49. in the presence of external forces, the center of buoyancy of an inclined vessel is vertically aligned with the
metacenter
50. wind and seas ha caused a difference between drafts on the starboard and port, this difference is ___?
heel
51. a tank which is not completely full or empty is termed ______?
slack
52. A partially full tank causes a virtual rise in the height of the _____.
center of gravity
53. If you shift fuel oil so that the trim and KG of the ship remains the same but free surface correction for the fuel oi tanks are reduced, what will happen to the GM?
GM is increased
54. An increase in the free surface has the effect of raising the:
virtual height of the center of gravity
55. a vessel has ____ degrees of freedom?
six
56. the vertical component of hydrostatic pressure acting upwards is termed
Buoyancy
57. If you increase the number of slack liquid tanks, it will have the effect of raising the?
virtual height of the center of gravity
58. the bending moments acting along the longitudinal vertical planes is called?
still water bending moment
59. the foremost major watertight bulkhead is called
60. If you reduce the free surfaces, it will have the effect of lowering the
virtual height of the center of gravity
61. an imaginary line drawn perpendicular to the waterline where the edge of the rudder post meets the summer loadline is called
after perpendicular
62. a horizontal line drawn along the top edge of the keel from midship
baseline
63. tankers which carries liquid is dangerous to the stability of the vessel when it is?
slack
64. the positioning and temporary fastening together of units or fabricated parts of a ship prior to welding is called
erection
65. a void or empty space between two bulkheads or floors which prevents leakage from one to the other is called
cofferdam
66. a fitting on the end of the boom or derrick which connects it to the mast or post and permits a swivel motion is a
gooseneck
67. what is the principal danger from liquid in a half full tank on board a vessel?
loss of stability from free surface effects
68. the measure of the internal capacity of the ship is called
gross tonnage
69. the measure of the earning or useful capacity of the ship is called
net tonnage
70. A virtual rise in the center of gravity may be caused by:
using fuel from a pressed fuel oil tank
71. the international convention on tonnage measurement was convened by IMO on the year
1969
72. a vessel is experiencing strong wind on the port beam, this has the same effect on the stability as:
weight that is off center to starboard
73. Measurement fro tonnage and issue of an international tonnage certificate is the responsibility of
flag state
74. when a wind force causes a vessel to a static angle, the
righting moment equals the wind heeling moment
75. a direction at right angles to the centerline of the ship or an item of structure in the this position is called an;
transverse
76. the height of the bottom shell plating above the base line measured at the moulded beam line is called
rise of floor
77. the effect of free surface on initial stability depends upon
the dimension of liquid surface and the volume of the vessels displacement
78. if a vessel is carrying timber on the exposed deck it is considered that the deck cargoes affords ______ buoyancy?
more
79. rudders which have a small proportion of their lateral area forward of the turning axis or less than 20 percent are termed
semi-balanced rudders
80. rudders that have a larger area forward of the axis or 25-30 percent are called
balanced
81. the most important factor in calculating the free surface constant of a tank carrying liquid is:
82. rudders that have the full area aft of the axis are called
un-balanced rudders
83. a _____ forms the after bearing of the propeller shat and incorporates the watertight gland through the intact hull?
sterntube
84. propellers in which the blades are separately mounted on the boss and in which the pitch of the blades can be adjusted or reversed are called;
controllable pitch propeller
85. The curvature of the decks in the transverse direction and measured as the height of deck at center above the height of deck at side is called
camber
86. The curvature of the decks in the transverse direction and measured as the height of deck at center above the height of deck at side is called
camber
87. The stability of the vessel at small angles of inclination of up to 15 degrees, wherein the GM or metacentric height is used as a measure
initial stability
88. the vertical distance measured at the ship's side between the summer loadline or service draft and the main continuous deck is called
freeboard
89. The stability of the vessel while floating in still water, it connotes an absence of movement of water where vessel floats
statical stability
90. the measurement from the base line to the heel of the upper deck beam ath the ship's side amidships is called
moulded depth
91. the work done in inclining a vessel as in the inclining experiment is called _____.
dynamic stability
92. the tendency of the vessel to return to its original upright position when inclined by an outside face is called ______.
transverse stability
93. The length over which the midship section remains constant in area and shape is called
parallel middle body
94. the push or pull on a body in stability is tradionally called ____.
force
95. the amount of water that can enter a compartment or tank after it has been bilged is called:
permeability
96. the force representing the combined effect of two or more forces acting at a point is called _____.
resultant force
97. an empty compartment has a permeability of;
100%
98. ___ is formed by two equal forces acting on a body in opposite directions and along parallel lines
couple
99. the measure of the turning effect of the force about a point is called ______.
moment of force
100. a filled water ballast tank when ship is in salt water has a permeability of
0%
101. the imaginary moment representing the combined effect of two or more forces acting about a point is called
resultant moment
102. a grain filled cargo compartment has a permeability of about
60-65%
103. the fundamental measure of the amount quantity of matter in a body is called _____.
mass
104. the arrangement of the shell plating taken from the three dimensional model and represented on a two-dimensional drawing are referred to as;
shell expansion
105. the force exerted on the body by the earths gravitational force and is measured in terms of Newton(N) or Kilo-Newton(kN) is called _____
weight
106. in ro-ro and container ships the _____ of cargo is an important safety consideration and calls for fittings which permits rapid, easy and effective securing of cargoes
lashing
107. the ratio of the density of the substance to the density of water is called ______.
specific gravity
108. when a ship sags, ______ stresses are set up in the deck
compressive
109. when a ship sags, ____ stresses are set up in the bottom shell plating
tensile
110. when reading the statical stability curves, the _____ corresponds approximately to the angle of deck immersion
angle of maximum stability
111. all ships must have an annual survey carried out by a surveyor of a classification of society, this should preferably take place in a drydock, but the period between in-dock surveys can be extended up to;
30 months (2.5 years)
112. When reading the statical stability curves, the _____ corresponds to the angle of deck immersion unless range is greater than 90 degrees
angle of maximum list
113. this provides a method for estimating the additional draft or determining the extra load that can be taken on board when a vessel is being loaded in water of less than that of salt water