40.In addition to the compression ring, what type of piston ring is also in general use?(A)plate rin
32.鍋爐吹放可採取「三度吹放」，其作業步驟為何？(A)先底部排放，次為表面排放，再為表面排放 (B)先表面排放，次為底部排放，再為表面排放 (C)先表面排放，次為底部排放，再為底部排放 (D)先底部
34.What kind of spanner is the one-piece spanner with an enclosed opening that grips all the faces o
35.What is the device used to tighten and seal a hose onto a fitting such as a barb?(A)screw (B)grin
36.What is the common and handy measuring tool with the flexibility allowing for a measure of greatl
38.In the case where the turbocharger is in trouble, what type of operation shall be undertaken with
39.If the exhaust temperature exceeds the limit stated in the Records of Ship Trial, what action sha