【名词&注释】
往复泵(reciprocating pump)、活塞杆(piston rod)、惰性气体(inert gas)、理论上(theory)
[单选题]检验前必须对舱内进行(),以满足人员进舱要求。
A. 清洗
B. 冲入惰性气体
C. 通风除气
查看答案&解析查看所有试题
学习资料:
[单选题]________ there much cargo in the warehouse?
A. Are
B. Is
C. Be
D. Will be
[单选题]Fusible plugs are installed in fire-tube boilers to _____.
A. provide a means of draining the boiler
B. warn the engineer of low water level
C. cool the crown sheet at high firing rates
D. open the burners electrical firing circuits
[单选题]双缸四作用往复泵漏装一个泵阀,如不计活塞杆体积,理论上(theory)流量将( )。
A. 减少1/2
B. 减少1/4
C. 减少1/8
D. 为0
[单选题]以下说法中正确的是________①当任意一船在前方发现他船前后桅灯成一直线,“对遇局面”规则开始适用②当任意一船在前方发现他船两盏红、绿舷灯时,“对遇局面”规则开始适用。
A. ①对
B. ②对
C. ①②都对
D. ①②都不对
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