單項(xiàng)選擇題Leg penetration to depths which require pullout forces greater than that which can be supplied by the buoyancy of the hull may exist in（）.

A.soft mud
B.sand
C.silt
D.soft to firm clays


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1.單項(xiàng)選擇題It is sometimes necessary to moor bow and stern to two mooring buoys in order to（）.

A.avoid any swing in a restricted space
B.shelter the ship from strong winds
C.prevent from touching with other vessels
D.make a convenience of cargo discharging

2.單項(xiàng)選擇題Installing tandem anchors on the same mooring line is referred to as（）.

A.doubling
B.pretensioning
C.piggybacking
D.paralleling

3.單項(xiàng)選擇題In a crossing situation，a vessel fishing must keep out of the way of a vessel which is（）.

A.under sail
B.towing
C.restricted in her ability to maneuver
D.engaged in pilotage duty

4.單項(xiàng)選擇題In a combination chain and wire rope mooring system，the anchor chain is deployed at the anchor end of the line to（）.

A.increase fatigue life of the system
B.reduce the time to retrieve the line
C.increase the holding power
D.reduce the catenary

5.單項(xiàng)選擇題Galvanizing would not be suitable for protecting wire rope which is used for（）.

A.cargo runners
B.mooring wires
C.shrouds
D.stays