20. 下列哪一物理量降低改變造成冷煤流經過膨脹閥後能夠汽化吸熱? (A) 溫度 (B) 焓值 (C) 壓力 (D) 乾度

9. The followings are procedures of air running. (1)Set the ENGINE/REMOTE operation selector switch in the ENGINE position. (Alarm panel in engine room) (2)Open the pressure indicator cocks of all the cylinders. (3)Set the start/stop lever in the STOP position. (4)Hold the START switch pressing for 2 to 3 seconds to effect air running. Which one is correct? (A) (1)→(2)→(3)→(4) (B) (1)→(4)→(3)→(2) (C) (4)→(2)→(3)→(1) (D) (4)→(2)→(1)→(3)

20. 下列哪一物理量降低改變造成冷煤流經過膨脹閥後能夠汽化吸熱?
(A) 溫度
(B) 焓值
(C) 壓力
(D) 乾度

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