單項(xiàng)選擇題A crack in the deck plating of a vessel may be temporarily prevented from increasing in length by（）.

A.cutting a square notch at each end of the crack
B.drilling a hole at each end of the crack
C.slot-welding the crack
D.welding a doubler over the crack


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3.單項(xiàng)選擇題How do the height and location of a tug’s towing bitts relate to the danger of tripping?（）

A.The further forward and closer to amidships the more readily the tug will trip
B.Placement further aft permits more effective pulling，better steering and eliminates the danger of tripping
C.Installing the bitts down low lowers the center of gravity
D.The height and position of towing bitts has no significance

4.單項(xiàng)選擇題How can the Coast Guard determine that a crew member is “able to understand any order spoken by the officers”?（）

A.Require a demonstration by the officer and the crew member
B.Require a written test
C.Require that an interpreter be provided
D.All of the above

5.單項(xiàng)選擇題Generally speaking，in the Northern Hemisphere，when winds are blowing from between SE and SW the barometric reading（）.

A.makes no change at all
B.is somewhat lower than it would be for winds from a northern quadrant
C.is uncertain and may fluctuate by increasing and decreasing
D.is somewhat higher than it would be for winds from the northern quadrant

6.單項(xiàng)選擇題From your position you observe a rotating white and green light to the north. This light is most likely（）.

A.at an airport
B.on a naval mine-countermeasures vessel
C.Block Island North Light
D.on a vessel engaged in public safety activity

7.單項(xiàng)選擇題Hanging a barge off means to（）.

A.moor a damaged barge to the bank and leave
B.remove and deliver a loaded barge from a multiple tow
C.remove a barge while locking through
D.tow an empty barge astern

8.單項(xiàng)選擇題Hot air can hold（）.

A.less moisture than cold air
B.more moisture than cold air
C.the same amount of moisture as cold air
D.moisture independent of air temperature

9.單項(xiàng)選擇題Handholds or straps on the underside of an inflatable liferaft are provided（）.

A.to right the raft if it capsizes
B.to carry the raft around on deck
C.for crewmen to hang on to
D.to hang the raft for drying

10.單項(xiàng)選擇題High pressure and low pressure alarms must be tested（）.

A.no earlier than 24 hours prior to loading
B.no later than 24 hours prior to loading
C.anytime prior to loading
D.weekly