The SOLAS convention about “passenger ship and dried food ship damage control” prescribes that the engine room emergency bilge water suction should connect with ()
A. the main S-W pump
B. ballast pump
C. air-conditioning water pump
D. the main S-W pump or ballast pumps that have the biggest output
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电机干燥时应注意事项:加热过程中应防止局部过热。在干燥过程中,应每隔半小时测量一次绝缘电阻,其值稳定3小时后,即可认为干燥完成。测得电阻应大于()。过分潮湿的电机不推荐采用线圈通电加热法。
A. 0.5MΩ
B. 0.40MΩ
C. 0.3MΩ
D. 0.1M&Omega
对于爆炸危险场所的单相线路,应安装(),以便同时断开相线和零线。
A. 三级开关
B. 单极开关
C. 双极开关
D. 四极开关