單項(xiàng)選擇題As the displacement of a vessel increases, the detrimental effect of free surface（）.

A.increases
B.decreases
C.remains the same
D.may increase or decrease depending on the fineness of the vessel's form


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1.單項(xiàng)選擇題As the temperature for a given mass of air increase, the（）.

A.dew point increase
B.dew point decreases
C.relative humidity increases
D.relative humidity decreases

2.單項(xiàng)選擇題Assuming an even transverse distribution of weight in a vessel, which condition could cause a list?（）.

A.Empty double-bottoms and lower holds, and a heavy deck cargo
B.Flooding the forepeak to correct the vessel's trim
C.Having KG smaller than KM
D.Having a small positive righting arm

3.單項(xiàng)選擇題At all angles of inclination, the metacenter is（）.

A.vertically above the center of buoyancy
B.vertically above the center of gravity
C.at the intersection of the upright vertical centerline and the line of action of the buoyant force
D.at the geometric center of the underwater volume

4.單項(xiàng)選擇題At all angles of inclination, the ttrue measure of a vessel''s stability is the（）.

A.metacentric height
B.displacement
C.righting moment
D.inclining moment

5.單項(xiàng)選擇題Atmosphere laden with coal dust or grain dust caused by loading these cargoes（）.

A.require loading operations to be shut down until the atmosphere clears
B.are toxic to human life
C.are subject to spontaneous combustion
D.may be explosive in some concentrations