
【名词&注释】
轴功率(shaft power)、救生艇(boat)、救生筏(life raft)
                            
                                                                                         
                                                                    
                                                                     [单选题]泵的总效率是指( )。
                                                                                                
                                  A. 实际流量与理论流量之比 
  B. 实际扬程与理论扬程之比 
  C. 有效功率与轴功率之比 
  D. 传给液体的功率与输入功率之比 
 
                                    
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                                                                    举一反三:
                                                                    
                                                                         
                                    
                                     [单选题]救生艇上应以经久的明显字迹标明()
                                                                                                            
                                            A. 建造材料 
  B. 乘员定额 
  C. 机器型号 
 
                                                                    
                                    
                                     [单选题]满载救生筏体和属具备品的容器在落入水中后要求()
                                                                                                            
                                            A. 在水中能够漂浮、时间不少于30min 
  B. 在水中能够漂浮、时间不少于40min 
  C. 在水中能够漂浮、时间不少于20min 
 
                                                                    
                                    
                                     [单选题]重力式降放救生艇的吊钩脱开装置应该()
                                                                                                            
                                            A. 在无负荷和有负载情况下,应该都能够同时脱开所有的吊艇钩 
  B. 发出警示后,在无负荷情况下应该能够脱开吊艇钧 
  C. 有负载时,应该能够同时脱开所有的吊艇钧 
 
                                                                    
                                    
                                     [单选题]A diesel engine exposed to widely varying ambient temperatures should use to a lubricating oil with .
                                                                                                            
                                            A. a high viscosity index 
  B. a low viscosity index 
  C. neutralize acids 
  D. resist oxidation at high temperatures 
 
                                                                    
                                    
                                     [单选题]STCW78/95 Convention describes that _____ are laid down for the certification of engineer officers in charge of a watch in a traditionally manned engine room, or the designated engineer in a periodically unmanned engine room.
                                                                                                            
                                            A. available minimum requirements 
  B. available maximum requirements 
  C. mandatory minimum requirements 
  D. mandatory maximum requirements 
 
                                                            
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