【名词&注释】
水压试验(hydrostatic test)、不平衡(unbalance)、增压器(turbocharger)、螺旋桨桨叶(propeller blades)、不允许(not allow)
[单选题]引起增压器振动的原因有()。Ⅰ.轴承损坏;Ⅱ.转子弯曲变形;Ⅲ.转子冷却不良;Ⅳ.转子不平衡;Ⅴ.油泵安装不良。
A. Ⅱ+Ⅳ+Ⅴ
B. Ⅰ+Ⅱ
C. Ⅰ+Ⅱ+Ⅴ
D. Ⅰ+Ⅱ+Ⅳ
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学习资料:
[单选题]船舶有效功率是指船舶航行时()的功率。
A. 主机所发出
B. 克服船体阻力消耗
C. 主机100%标定点
D. 最大航速时主机发出
[单选题]曲轴的臂距差对应着曲柄的变形,若臂距差小于零,则在水平平面内曲柄呈()。
A. 塌腰形
B. 拱腰形
C. 左拱形
D. 右拱形
[单选题]测量曲轴臂距差时,曲轴旋转一周,可依次测得臂距值为()。
A. L右、L上、L下、L左
B. L上、L下、L左、L右
C. L左、L右、L上、L下
D. L上、L右、L下、L左
[单选题]轴承密封装置防蚀衬套进行水压试验时()。
A. 允许渗漏
B. 不允许(not allow)渗漏
C. 允许微渗
D. 不允许(not allow)任何渗漏
[单选题]螺旋桨桨叶表面的缺陷主要有()。Ⅰ.穴蚀和腐蚀;Ⅱ.裂纹;Ⅲ.断裂;Ⅳ.污损;Ⅴ.碰撞。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ+Ⅴ
C. Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]() of the A-frames there is a strong cast iron frame called the scavenging air box.
A. At the top
B. At the bottom
C. In the top
D. In the bottom
[单选题]With the crank in position in the engine, some measurements can be taken by a special bridge gauge and ().
A. a micrometer
B. a bowl
C. a feeler gauge
D. a wrench
[单选题]In the closed cooling system, the water ().
A. is made to circulate out of the system
B. is made to circulate within the system
C. is made circulate within the system
D. is made circulate out of the system
[单选题]A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST ().
A. reduce the engine load
B. increase the cooling water flow
C. increase the lube oil pressure
D. adjust the fuel rack
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