航海英语船舶浮性资料章节练习(2019.04.29)

单项选择题
My drafts are 28 feet（）and 29 feet aft.
A.fore
B.advance
C.before
D.beforehand
单项选择题
Deballasting a double bottom has what affect on KG?（）
A.KG is increased
B.KG is decreased
C.KG is not affected
D.KG increases at light drafts and decreases at deep drafts
单项选择题
In the absence of external forces，the center of buoyancy of an inclined vessel is vertically aligned directly below the（）.
A.center of gravity
B.amidships station
C.center of flotation
D.geometric center of the waterplane area
单项选择题
In practice，it is usual for the ship to be loaded（）to improve the vessel’s movement through the water.
A.a little deeper aft
B.a little deeper forward
C.at the same draught between fore and aft
D.a balance between two sides
单项选择题
Shifting weight aft in heavy weather will reduce the tendency to yaw，but may increase the tendency to（）.
A.be pooped
B.pitchpole
C.broach
D.squat
单项选择题
If the buoyant force on a ship’s hull is equal to the displacement tonnage，the ship will（）.
A.require ballast
B.be down by the head
C.sink
D.float
单项选择题
The center of the underwater volume of a floating vessel is the（）.
A.center of buoyancy
B.center of flotation
C.uncorrected height of the center of gravity of the vessel
D.center of gravity of the vessel corrected for free surface effects
单项选择题
Aboard a vessel，multiplying a load’s weight by the distance of the load’s center of gravity from the centerline results in the load’s（）.
A.TCG
B.transverse moment
C.righting moment
D.transverse free surface moment
单项选择题
Your vessel is damaged and is listing to port. The rolling period is short. There is sufficient freeboard so that deck edge submersion is not a problem. What corrective action should be taken FIRST in regard to the vessel’s stability?（）.
A.Press up any slack double-bottom tanks to eliminate free surface
B.Flood any empty double-bottom tanks to add weight low and down
C.Jettison topside weights to reduce KG and KB
D.Shift any off-center weights from port to starboard
单项选择题
Intact buoyancy is a term used to describe（）.
A.the volume of all intact spaces above the waterline
B.an intact space below the surface of a flooded area
C.an intact space which can be flooded without causing a ship to sink
D.the space at which all the vertical upward forces of buoyancy are considered to be concentrated