单项选择题
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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单项选择题
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 -
单项选择题
（）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 -
单项选择题
When loading a cargo of taconite，proper sequencing of loading by hatch number is necessary to （）.
A.provide the proper trim
B.prevent negative stability from developing
C.prevent excessive longitudinal stresses
D.control list
