單項(xiàng)選擇題

A grapnel is a（）.

A.device for securing a chain topping lift
B.hook to prevent the anchor cable from slipping
C.device used to drag for a submerged cable or line
D.type of clam bucket used for discharging bulk cargo

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單項(xiàng)選擇題

A deck beam does NOT（）.

A.act as a beam to support vertical deck loads
B.lessen the longitudinal stiffness of the vessel
C.act as a tie to keep the sides of the ship in place
D.act as a web to prevent plate wrinkling due to twisting action on the vessel

單項(xiàng)選擇題

（）are to be used for dunnage if you load rice.

A.wooden planks
B.rush mats
C.steel bars
D.wooden planks and rush mats