單項選擇題Before loading bulk grain，bilge wells must be covered to（）.

A.add strength to the bilge well strainer
B.permit rapid flow of water to the bilge wells
C.prevent cargo sifting into the bilge wells
D.prevent oil，water，or other liquid from reaching the cargo


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1.單項選擇題Bags are usually stowed in between the bulk grain（）.

A.to ventilate the hold
B.to separate the cargo
C.to replace shifting boards
D.to facilitate stowage

2.單項選擇題Atmospheres laden with coal dust or grain dust caused by loading these cargoes（）.

A.require loading operations to be shut down until the atmosphere clears
B.are toxic to human life
C.are subject to spontaneous combustion
D.may be explosive in some concentrations

3.單項選擇題A venetian vent or rice ventilator is used in stowage of which cargo?（）.

A.Bagged cargo
B.Bulk grain
C.Bulk rice
D.Refrigerated goods

4.單項選擇題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

5.單項選擇題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