【名词&注释】
离心泵(centrifugal pump)、叶片泵(vane pump)、给水泵(feed water pump)、圆锥体(cone)、螺旋桨轴(propeller shaft)、旋涡泵(vortex pump)、机动船(motor vessel)、不具备(does not have)
[单选题]锅炉汽压为0.5MPa，其水位比热水井水位高2m，其给水泵排压为0.55MPa，吸压为-0.05MPa，则该泵管路阻力约为( )(设1MPa≈100m水柱高)。
A. 2m
B. 3m
C. 8m
D. 10m
查看答案&解析
举一反三：
[单选题]下列泵中不采用特殊措施不具备(does not have)自吸能力的是( )。
A. 水环泵.
B. 开式旋涡泵(vortex pump)
C. 叶片泵
D. 离心泵
[单选题]Vessels having main engines arranged for air starting are to be provided with at least__.
A. one automatic drain serving both containers
B. two air starting containers of approximately equal size
C. one control air container and one starting air container
D. one additional means of starting the main engine
[单选题]一机动船(motor vessel)与一帆船在相反航向上对驶，构成碰撞危险，应________。
A. 遵守对遇条款
B. 帆船让机动船(motor vessel)
C. 机动船(motor vessel)让帆船
D. 各自向右转向
[单选题]During the dock repair,______should be measured firstly before tail shaft drawn out.
A. the sinking of tail shaft
B. the clearance of stern bearing
C. the total flexure of shaft
D. main engine crankshaft deflection
[单选题]白天，看到两个尖顶对接的圆锥体号型时，则：I、该船可能为从事拖网作业的渔船在航行中；II、该船可能为在锚泊中从事非拖网作业的渔船；III、该船一定为在航中从事捕鱼的船舶
A. I
B. I、III
C. I、II
D. I、II、III
[单选题]船规要求螺旋桨轴和艉轴的检验，一般单桨船为-( )年;双桨船为( )年。
A. 3～4/4～5
B. 1.5～3/3～5
C. 1.5～2/3～4
D. 1.5-2/4～5
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