8. 使用下列那一種冷媒之冷凍系統較不易發生冰塞？ (A) R-12 (B) R-22 (C)NH3 (D) R-134a

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.

8. 使用下列那一種冷媒之冷凍系統較不易發生冰塞？
(A) R-12
(B) R-22
(C)NH₃
(D) R-134a

相關試題

相關試卷