單項(xiàng)選擇題

Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.

A.back current from the rudder
B.greater pressure on the right or left side of the propeller，depending on rotation
C.lower pressure on the right or left side of the propeller，depending on rotation
D.torque from the velocity and angle at which the surrounding water impinges upon the propeller blades

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單項(xiàng)選擇題

Shell plating that has curvature in two directions and must be heated and hammered to shape over specially prepared forms is called（）.

A.compound plate
B.furnaced plate
C.flat plate
D.rolled plate

單項(xiàng)選擇題

Panting frames are located in the（）.

A.after double bottoms
B.centerline tanks on tankers
C.fore and after peaks
D.forward double bottoms

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Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.

你可能感興趣的試題

Shell plating that has curvature in two directions and must be heated and hammered to shape over specially prepared forms is called（）.

Panting frames are located in the（）.

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Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.