24. 離心式泵旋轉時軸承發熱的原因為何？ (A) 軸中心線不直，或潤滑不足 (B) 水封管堵塞，有空氣自迫緊處侵入 (C) 引注水太急，空氣未得完全排盡 (D) 吸水高度太高

6. Before the initial start of the engine after its installation, perform correct inspection and operational preparation and make sure there is no abnormality. Which one is incorrect? (A) Close the lubricating oil priming pump and the pressure indicator cocks of all the cylinders. (B) While turning the flywheel, make sure the lubricating oil is dropping from each part of the valve rocker arm shafts, piston pins, main bearings and swing arms. (C) Bleed the air from the lubricating oil strainer. (D) Manually lubricate the governor linkage, and make sure it moves smoothly.

24. 離心式泵旋轉時軸承發熱的原因為何？
(A) 軸中心線不直，或潤滑不足
(B) 水封管堵塞，有空氣自迫緊處侵入
(C) 引注水太急，空氣未得完全排盡
(D) 吸水高度太高

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