【名词&注释】
耐磨性(wear resistance)、柴油机(diesel engine)、绝缘性(insulating)、专用工具(special tool)、符合要求(meet the requirement)、增压器转子(blower rotor)
[单选题]Each piston stuffing box is provided with two sealing rings and three()
A. packings
B. piston rings
C. distributor rings
D. scraper ring
查看答案&解析
查看所有试题
学习资料:
[单选题]拆下来的增压器转子(blower rotor)一般应该(),以防止()。
A. 立放/受力不均
B. 平放/受力不均
C. 平放/变形
D. 立放/变形
[单选题]增压器发生故障后采用拆除转子的措施,不仅防止事故扩大,更重要的是保护了转子,但缺点是()。
A. 破坏了与柴油机联合装置的工作
B. 需要随机专用工具和专用盖板
C. 工作量大
D. 废气仍通过使壳体受到高温作用
[单选题]衡量轴系同轴度实测值δ总、φ总的标准,下列()的说法不正确。
A. 标准δ总δ总max、φ总max构成δ总max-φ总max三角形
B. δ总max、φ总max在三角形内的符合要求(meet the requirement)
C. δ总max、φ总max在三角形外的则超差
D. 当δ总max<φ总max,φ总<φ总max时符合要求(meet the requirement)
[单选题]桦木层压胶木是铁梨木的代用材料,具有材质致密、坚硬、耐热、绝缘性好、成材率高,缺点是()。Ⅰ.耐磨性差;Ⅱ.耐蚀性差;Ⅲ.耐水浸性差;Ⅳ.刚性差;Ⅴ.脆性大。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅴ
C. Ⅱ+Ⅴ
D. Ⅱ+Ⅳ
[单选题]对传动轴系理解正确的是()。Ⅰ.长轴系刚性好,对偏差敏感;Ⅱ.短轴系挠性好对偏差不敏感
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ+Ⅱ
D. Ⅰ,Ⅱ都不对
[单选题]转舵不准,舵角不正可能是()。
A. 舵杆折断
B. 舵叶进水
C. 舵杆变形
D. 舵承间隙过小
[单选题]The amount of lubricating oil in the drain tank should be checked by ().
A. measuring
B. sounding rod
C. metering
D. weighting
[单选题]Which of the following statements concerning fire-tube boilers is correct?()
A. Combustion gases flow through the tubes
B. Flames impinge on the tubes
C. Combustion occurs in the tubes
D. Water flows through the tube
[单选题]Which of the following devices is common to both mechanical and hydraulic governors?()
A. Direct linkage between the ball-head and fuel rack
B. A servomotor
C. A compensating device
D. Flyweight
本文链接:https://www.51bdks.net/show/jqg668.html