A、噪音增大
B、汽机振动
C、速度过大
D、效率低
第1题:
第2题:
船舶主机换向,从前进三到后退三约需时间为______。
A.蒸汽机船60-90s,汽轮机船90-120s,内燃机船120-180s
B.内燃机船60-90s, 蒸汽机船90-120s,汽轮机船120-180s
C.汽轮机船60-90s,蒸汽机船120-180s,内燃机船90-120s
D.蒸汽机船60-90s,内燃机船90-120s, 汽轮机船120-180s
第3题:
船舶主机换向,从前进三到后退三约需时间为:
A.蒸汽机船60-90s,汽轮机船90-120s,内燃机船120-180s
B.内燃机船60-90s, 蒸汽机船90-120s,汽轮机船120-180s
C.汽轮机船60-90s,蒸汽机船120-180s,内燃机船90-120s
D.蒸汽机船60-90s,内燃机船90-120s, 汽轮机船120-180s
第4题:
第5题:
滑销系统损坏的原因,下列叙述正确的有()。
A汽轮机组超负荷运行
B滑销材料强度不够,表面硬度太低
C滑销安装不正确,间隙太小
D凝汽器真空度过低