單項選擇題The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.

A.displacement
B.fumigation
C.discharging
D.compensation


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1.單項選擇題The correction to KG for longitudinal free surface effects for a vessel can be found by dividing the vessel’s displacement into the（）.

A.transverse free surface correction for the vessel
B.sum of the vertical moments of the vessel
C.sum of the longitudinal free surface moments of the vessel
D.longitudinal centerline of the vessel

2.單項選擇題The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the（）.

A.counterweight
B.pedestal
C.longitudinal centerline
D.point of suspension

3.單項選擇題Strengthening damaged bulkheads by using wood or steel is called（）.

A.bracing
B.battening
C.blocking
D.shoring

4.單項選擇題Stanchions prevent the entire deck load on a ship from being carried by the（）.

A.bulkheads
B.stringers
C.frames and beam brackets
D.deck longitudinals

5.單項選擇題Stable equilibrium for a vessel means that the metacenter is（）.

A.at a lower level than the baseline
B.on the longitudinal centerline
C.higher than the center of gravity
D.at amidships