單項選擇題The distance between the bottom of the hull and the waterline is called （）.

A.tonnage
B.reserve buoyancy
C.draft
D.freeboard


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2.單項選擇題Which of the following statements describes one of the functions of the ballast system?（）

A.To permit flooding of any fuel oil storage tank on any class of ship
B.To use it as a secondary service system
C.To store reserve feed or potable water for extended cruises
D.To stabilize the ship by flooding certain designed tanks with seawater

3.單項選擇題The abbreviation "GM" is used to represent the （）.

A.height of the metacenter
B.fighting arm
C.righting moment
D.metacentric height

4.單項選擇題A segregated ballast system is a system where （）.

A.all ballast is processed through the oily water separator
B.ballast is taken on and discharged through a separate main deck riser
C.ballast and cargo tanks are separated by cofferdams
D.all ballast lines, tanks, and pumps are independent of those used for oil

5.單項選擇題A vessel is required to carry an Oil Record Book Part I to log entries in the book regarding the （）.

A.discharge of ballast or cleaning water from fuel tanks
B.sounding levels of all fuel tanks on a daily basis
C.grade and specific gravity of all fuel oil carded
D.fuel consumption rates on a weekly basis