單項選擇題As to the stained plates，the fault lies（）you.

A.on
B.to
C.up
D.with


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1.單項選擇題A virtual rise in the center of gravity may be caused by（）.

A.filling a partially filled tank
B.using an on board crane to lift a freely swinging heavy object
C.emptying a partially filled tank
D.transferring ballast from the forepeak to the after peak

2.單項選擇題A vessel is equipped with twin propellers，both turning outboard with the engines half ahead. If there is no wind or current and the rudders are amidships，what will happen?（）.

A.The bow will swing to starboard
B.The bow will swing to port
C.The vessel will steer a zigzag course
D.The vessel will steer a fairly straight course

3.單項選擇題A twin-screw vessel with a single rudder is making headway. The engines are full speed ahead. There is no wind or current. Which statement is FALSE?（）.

A.If one screw is stopped，the ship will turn toward the side of the stopped screw
B.The principal force which turns the ship is set up by the wake against the forward side of the rudder
C.Turning response by use of the rudder only is greater than on a single-screw vessel
D.With the rudder amidships，the ship will steer a fairly steady course

4.單項選擇題A single-screw vessel going ahead tends to turn more rapidly to port because of propeller（）.

A.discharge current
B.suction current
C.sidewise force
D.thrust

5.單項選擇題A record of the types and strengths of steels used on a ship must be included in the（）.

A.general plans
B.builder's documentation
C.Certificate of Inspection
D.construction portfolio