Naval Architecture – MEO CLASS 4 WRITTEN PAPER

121. When making a turn (course change) on most merchant ships, the vessel will heel outwards if __________.
     1. the vessel has very little draft
     2. G is above the center of lateral resistance
     3. G is below the center of lateral resistance
     4. the vessel is deeply laden

ANS.: C

122. The effects of free surface on initial stability depend upon the dimensions of the surface of the free liquids and the __________.
     1. Volume of liquid in the tank
     2. Volume of displacement of the vessel
     3. Location of the tank in the vessel
     4. Height of the center of gravity of the vessel

ANS.: B

123. Which statement about the free surface effect is TRUE?
     1. It increases in direct proportion to the length of the tank times the breadth squared.
     2. It decreases at increased angles of heel due to pocketing when a tank is 90% full.
     3. It decreases in direct proportion to increasing specific gravity of the liquid in the tank.
     4. In practice, the correction is considered to be a virtual reduction of KG.

ANS.: B

124. GM cannot be used as an indicator of stability at all angles of inclination because __________.
     1. M is not fixed at large angles
     2. There is no M at large angles
     3. G is not fixed at large angles
     4. there is no G at large angles

ANS.: A

125. That center around which a vessel trims is called the __________.
     1. tipping center
     2. center of buoyancy
     3. center of gravity
     4. turning center

ANS.: A

126. Many vessels are provided with flume tanks, which also have a dump tank located under the flume tanks. In the event the ship is damaged, you could dump the flume tanks into the dump tank which would
     1. reduce the free surface effect and raise the KG
     2. not have any effect on free surface and raise the KG
     3. reduce the free surface effect and lower the KG
     4. not have any effect on free surface and lower the KG

ANS.: C

127. After transferring a weight forward on a vessel, the draft at the center of flotation will ______
     1. change, depending on the location of the LCG
     2. increase
     3. decrease
     4. remain constant

ANS.: D

128. The difference between the starboard and port drafts due to wind or seas is called __________.
     1. list
     2. heel
     3. trim
     4. flotation

ANS.: B