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