22. 下列何種接頭適用於各種大口徑管與高壓管，其優點為便於拆裝調換？ (A) 螺紋接頭 (B) 螺栓凸緣接頭 (C) 熔焊接頭 (D) 銀焊接頭

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.