7. 下列何者不包括在鍋爐發生爐膛燃氣爆炸之原因? (A) 供油電磁閥關閉不緊 (B) 掃氣不徹底 (C) 點火失敗重新點火時未重新掃氣 (D) 過剩空氣係數太小

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.

7. 下列何者不包括在鍋爐發生爐膛燃氣爆炸之原因?
(A) 供油電磁閥關閉不緊
(B) 掃氣不徹底
(C) 點火失敗重新點火時未重新掃氣
(D) 過剩空氣係數太小

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