A thin，whitish，high cloud popularly kn...

单项选择题A thin，whitish，high cloud popularly known as “mares’ tails” is（）.

A.altostratus
B.stratus
C.cumulus
D.cirrus

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1.单项选择题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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2.单项选择题A tackle is “two blocked” when the blocks are（）.

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

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3.单项选择题A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a（）.

A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current

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4.单项选择题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
C.against the wind
D.with the wind

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5.单项选择题A sufficient amount of chain must be veered when anchoring a vessel to ensure（）.

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

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6.单项选择题A strong，often violent，northerly wind occurring on the Pacific coast of Mexico，particularly during the colder months，is called（）.

A.Tehuantepecer
B.Papagayo
C.Norther
D.Pampero

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7.单项选择题A stretch where the channel changes from one side of the river to the other is called a （）.

A.bifurcation
B.transit
C.crossing
D.changeover

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8.单项选择题A storm’s track is characterized by all of the following except（）.

A.the direction the storm has come from
B.the direction in which the storm is moving
C.the speed at which the storm is moving
D.the path taken by the storm

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9.单项选择题A stand-on vessel is（）.

A.required to give way in a crossing situation
B.required to sound the first passing signal in a meeting situation
C.free to maneuver in any crossing or meeting situation as it has the right-of-way
D.required to maintain course and speed in a crossing situation but may take action to avoid collision

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10.单项选择题A stage should only be rigged（）.

A.over the bow or stern of a vessel
B.over the flat sides of a vessel
C.over the open water
D.over the dockside

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