19. 當溫度升高時，液體黏度變化為何？ (A) 降低 (B) 增大 (C) 不變 (D) 不一定

8. The followings are procedures of start the engine. Which step is incorrect? (A) Set the stop lever in the RUN position. (B) Make sure the pressure indicator cock is closed. (C) Set the operation selector switch to the ENGINE position control panel to be selected. (D) Make sure the gear pump is in the GEAR OUT position.