Gross tonnage indicates the vessel’s（）.

单项选择题Grinding to eliminate shallow surface defects should be done（）.

A.parallel to the longitudinal direction of the chain
B.perpendicular to the direction of the anchor chain
C.diagonally across the link of the anchor chain
D.around the circumference of the chain link

单项选择题Fuel oil tank vents are fitted with a screen which will stop（）.

A.oil from flowing out of the tank vent
B.air from entering the tank vent
C.vapors from leaving the tank vent
D.flames on deck from entering the tank vent

单项选择题Freeboard is measured from the upper edge of the（）.

A.bulkwark
B.deck line
C.gunwale bar
D.sheer strake

单项选择题Forecastle deck is located in the ship’s（）.

A.bow stem
B.stern
C.portside
D.starboard side

单项选择题Electric cargo winches have an overload safety device which normally cuts the current to the winch motor（）.

A.after torque causes line pull to exceed the rated capacity of the winch
B.before the line pull reaches the rated capacity of the winch
C.when the line pull reaches the breaking strength of the fall
D.before the safe working load of the fall is reached