1. [单选题]When checking zinc plates in the refrigerating system condenser, you should
A. paint and insulate the plates to prevent corrosion
B. renew the plates at each inspection
C. replace the zincs if deteriorated by 50%
D. file the plates to change the negative value
2. [单选题]船舶航行交接班的问题汇总，应由何人将主要问题记入轮机日志中______。
A. 轮机长
B. 大管轮
C. 交班轮机员
D. 接班轮机员
3. [单选题]故障率曲线(failure rate curve)中，如果机械和设备的故障率曲线(failure rate curve)具有明显的( )故障期和足够大的( )故障期，上述机械和设备可采用定时维修方式延长使用寿命(increase of service life)。
A. 早期/磨损
B. 随机/磨损
C. 磨损/随机
D. 磨损/早期
4. [单选题]不应妨碍一词意味着，一船应________。
A. 尽可能采取能导致两船在安全的距离上通过的方法航行，即避免两船形成紧迫局面
B. 尽可能采取避免发生紧迫危险的方法航行
C. 采取行动以留出足够的水域供他船安全通过
D. A和C都对
5. [单选题]Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?
A. Baffle plates that have been bent during prior removal
B. Leaks m the cooler tube nest
C. Operating the engine while maintaining a high sea water outlet temperature
D. A punctured sea water strainer supplying cooling water to the heat exchanger
