单项选择题

Compared to internal structural plating，the exterior hull plating on a vessel is usually（）.

A.stronger
B.thinner
C.more corrosion resistant
D.a lower grade steel

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单项选择题

Camber，in a ship，is usually measured in（）.

A.feet per feet of breadth
B.feet per feet of length
C.inches per feet of breadth
D.inches per feet of length

单项选择题

Battens are fitted in cargo holds across the frames of the vessel from the turn of the bilge upward. The purpose of these cargo battens is（）.

A.for securing a snatch block when snaking cargo into the wings of the hold
B.to prevent cargo from coming in contact with the vessel's frames or shell plating
C.to provide fittings to which cargo lashings may be secured
D.to support the dunnage floors which are laid down between tiers of cargo

单项选择题

Ballast water can only be（）in cargo tanks in exceptional cases where the particular character of the operation of an oil tanker renders it necessary to carry ballast water in excess of the quantity required，provided that such operation of the oil tanker falls under the category of exceptional cases as established by the Organization.

A.carried
B.contained
C.filled
D.stuffed