(3)雙閥座截止閥

三. 鍋爐熄火時及熄火後之安全守則為何？停用時應如何保養？

四. 輪機英文 ⑴ 請將下列英文譯成中文。 A centrifugal pump consists of a vaned impeller mounted on a shaft that rotates within a casing. The rotating motion of impeller feeds the mechanical energy into the fluid so that the flow rate with certain pressure heads are produced. Nevertheless, for each type of rotating machinery, the rotating component should be aligned with the axis of rotation longitudinal to the ship. This measure could avoid the high bearing loads that could occur during ship rolling if the machinery is mounted transversely.

(1)自動液壓控制裝置

(2)毛細管

(4)蒸發盤管

(5)濕度控制器

⑴列舉蓄壓器三個最主要的功能。（9分）

⑵依據蓄壓器內不同的油室與氣室分隔結構，分別列舉兩種蓄壓器常見的類型並分別說明其構造特色。（6分）

⑶試述蓄壓器氣室內之氣體多為何種氣體？其預載（Pre-load）壓力大約為多少？（5分）

⑴當發動機在運轉時，發生怎樣的情況下可以被稱作「Overspeed」現象？（4分）