30. 當往復泵出現排出壓力變動大時，需要採取下列何者動作？ (A) 向吸入空氣室補氣 (B) 向排出空氣室補氣 (C) 開大旁通閥，減小壓差 (D) 適當放掉空氣室的部分空氣

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.