[单选题]使用含有()的燃油添加剂,可使烟灰失去粘性,导致烟灰沉积趋势的减少。Ⅰ.氧化铜;Ⅱ.氧化铁
                                                             正确答案 :B
                    
                      
                                                                                                                                         仅Ⅱ对 
                                                                                                                                                            
                    
                                     [单选题]水润滑式艉轴工作轴颈包覆(),非工作轴颈包覆()。
                                                             正确答案 :D
                    
                      
                                                                                                                                                                                                                                                 铜套/玻璃钢 
                                                    
                    
                                     [单选题]水润滑式艉轴的()包覆铜套,以防止腐蚀。
                                                             正确答案 :A
                    
                      
                                                                                     工作轴颈 
                                                                                                                                                                                                                
                    
                                     [单选题]新制艉轴铜套的厚度应为()。
                                                             正确答案 :C
                    
                      
                                                                                                                                                                                             0.03d+7.5mm 
                                                                                                        
                    
                                     [单选题]航行时,水润滑艉轴承填料密封装置应将压盖螺栓(),停航时将压盖螺栓()。
                                                             正确答案 :B
                    
                      
                                                                                                                                         旋松/上紧 
                                                                                                                                                            
                    
                                     [单选题]After fitting back in place the gear wheels, dont forget () them.
                                                             正确答案 :A
                    
                      
                                                                                     to grease 
                                                                                                                                                                                                                
                    
                                     [单选题]Increased air () will raise scavenge efficiency and allow a greater mass of air to be compressed; more fuel may now be burned giving an increased power.
                                                             正确答案 :B
                    
                      
                                                                                                                                         density 
                                                                                                                                                            
                    
                                     [单选题]Main bearings are required to support the crankshaft at each ().
                                                             正确答案 :D
                    
                      
                                                                                                                                                                                                                                                 journal 
                                                    
                    
                                     [单选题]The high pressure in fuel injection system of the diesel engine is produced by the ().
                                                             正确答案 :A
                    
                      
                                                                                     injector pump 
                                                                                                                                                                                                                
                    
                                     [单选题]For Vee-form engines, () is shaped to given two slopping surface on which () are placed at the correct relative angle to each other.
                                                             正确答案 :C
                    
                      
                                                                                                                                                                                             the top of the column;the cylinder blocks 
                                                                                                        
                    
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