1. [单选题]The depth of the ship below the waterline measured vertically to the lowest part of the hull is called
  A. trim 
  B. lean 
  C. draft 
  D. tonnage 
 
2. [单选题]The operation of paralleling two alternators requires the voltages to be _____ and also in phase
  A. zero 
  B. eliminated 
  C. different 
  D. equal 
 
3. [单选题]不能列为轮机部技术资料的是______。
  A. 检修测量记录 
  B. 公用书籍 
  C. 化验报告 
  D. 试验报告 
 
4. [单选题]离心泵在实际工作中,当泵的流量大于设计流量时,两叶片间液体的相对速度(relative velocity)( )。
  A. 将增加 
  B. 将减少 
  C. 为迎水面增加,背水面减少 
  D. 为迎水面减少,背水面增加 
 
5. [单选题]自由降落式救生艇艇员登艇后,应面向()。
  A. 艇首 
  B. 艇尾 
  C. 艇舷侧