1. 艉軸管前軸封裝置內循環器（Circulator）之主要功能為何？ (A) 改善前端軸封環之潤滑 (B) 改善艉端軸封環之潤滑 (C) 改善艉端管之潤滑 (D) 改善艉軸管滑油冷卻效果

11. A ship’s propulsion plant should be rated such that the desired ship speed can be attained with additional power capabilities held in reserve to allow for a degradation of performance with time. In this regard, what factor summarized below is not considered? (A) The fouling and roughening of hull. (B) The global warming effects. (C) The reductions in the performance of prime mover. (D) The roughening of the working sections of propeller.

1. 艉軸管前軸封裝置內循環器（Circulator）之主要功能為何？
(A) 改善前端軸封環之潤滑
(B) 改善艉端軸封環之潤滑
(C) 改善艉端管之潤滑
(D) 改善艉軸管滑油冷卻效果

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