單項選擇題A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis,how will the value of the moment of inertia of the free surface be affected?()

A.The moment of inertia would remain unchanged
B.The moment of inertia would be 1/4 its original value
C.The moment of inertia would be 1/2 the original value
D.None of the above


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A.equally sharing the load
B.jammed together
C.as far apart as possible
D.rove to the highest mechanical advantage

3.單項選擇題A survival craft being used to pick up a person who has fallen overboard from a ship should approach the person().

A.at a high rate of speed
B.under oars
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D.with the wind

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A.the vessel has enough room to swing while at anchor
B.the anchor flukes bite into the ocean bottom
C.there is a sufficient scope of chain to keep the anchor on the bottom
D.there is more chain out than there is in the chain locker