39. 下列有關往復式泵特性的敘述，何項不正確？ (A) 可建立較高的壓力揚程 (B) 排出量理論上不一定，會隨壓力而改變 (C) 有較強的自吸能力 (D) 排出量呈脈動壓狀

8. One kind of tools which are in common use for daily maintenance works on the ship is a simple tool designed to insert and tighten, or to loosen and remove, screws. The tool comprises an approximately cylindrical handle to be held by the worker, and an axial shaft fixed to the handle, the tip of which is shaped to fit a particular type of screw. The handle and shaft allow the tool to apply torque. What tool is above description? (A) Hammer (B) Screwdriver (C) Pliers (D) Drill

39. 下列有關往復式泵特性的敘述，何項不正確？
(A) 可建立較高的壓力揚程
(B) 排出量理論上不一定，會隨壓力而改變
(C) 有較強的自吸能力
(D) 排出量呈脈動壓狀

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