單項(xiàng)選擇題Large quantities of uncovered pig iron or billets should not be carried in the upper-tween decks because（）.

A.this does not eliminate the risk of cargo shifting
B.this will increase the metacentric height of the ship
C.this will decrease the gravity height of the ship
D.this will reduce the rolling period of the ship


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2.單項(xiàng)選擇題In securing deck loads for an ocean tow，drill pipe should be（）.

A.galvanized to protect against corrosion
B.held in place with heavy materials such as spare pendant wire
C.limited to no more than five courses high
D.provided with bulwarks at both ends of their bays

3.單項(xiàng)選擇題In preparing a cargo space for receipt of a shipment of bagged cargo，which instruction for laying dunnage should be followed? （）

A.Use either 1 or 2 tiers of dunnage，spacing the pieces in each tier a foot apart，and lay pieces in the bottom tier diagonally to the ship's side
B.Use 1 tier of dunnage，laying the pieces tightly together to form a solid floor over the steel deck
C.Use 2 tiers of dunnage，spacing the pieces in the bottom tier about a foot apart and the pieces in the top tier 6 inches apart
D.Use 2 tiers of dunnage，spacing the pieces in the bottom tier about a foot apart and the pieces in the top tier together

4.單項(xiàng)選擇題In order to minimize the effects of a tender vessel，when carrying a cargo of lumber，you should（）.

A.maximize your deck load
B.distribute lumber so that those stowing most compactly per unit of weight are in the upper holds
C.place the heaviest woods in the lower holds
D.keep the vessel's frame spaces free from lumber

5.單項(xiàng)選擇題In observing rig motion while under tow，the period of roll is the time difference between（）.

A.zero inclination to full inclination on one side
B.full inclination on one side to full inclination on the other side
C.full inclination on one side to the next full inclination on the same side
D.zero inclination to the next zero inclination