單項選擇題

Nylon line is better suited than manila for（）.

A.Towing alongside
B.Towing astern
C.Holding knots and splices
D.Resisting damage from chemicals

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單項選擇題

Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use（）.

A.Gun tackle
B.Luff tackle
C.Two-fold tackle
D.Double-luff tackle

單項選擇題

Manila slings should not be used to load（）.

A.cotton
B.lumber
C.steel
D.tires