Marina Exam Reviewer: It is a propeller which is almost invariably righthanded. When the ship is driven ahead, the propeller revolves in a clockwise direction, when viewed from astern. To go astern the rotation of the propeller is reversed. It is __________.

Marina Exam Reviewer

It is a propeller which is almost invariably righthanded. When the ship is driven ahead, the propeller revolves in a clockwise direction, when viewed from astern. To go astern the rotation of the propeller is reversed. It is __________. 

A. twin screw 
B. Single screw 
C. triple crew 
D. quadruple screw 




Answer:     B. Single screw 

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